A kinematic and electromyographic study of grip in extension in a clinical setting

Aim: Grip, including grip in extension, is an essential element in human beings. The functional evaluation scales of the hand require a greater number of objective variables in order to offer an overall perspective. Devices such as surface electromyography and inertial sensors can be used in evaluation and tasks. Such equipment can lead to new variables for analysis and offer different approaches for treatment. Methods: Six participants were selected randomly from a sample of healthy population. Each participant made the grip in extension, which was parameterized in real time. This movement was analyzed and recorded in a synchronized manner with surface electromyography and accelerometer-type inertial sensors in the hand. Results: After analyzing and processing the data, it was possible to detect five phases within the movement thanks to in-depth analysis of the module vector of the index finger along with electromyography of the musculature of the first dorsal interosseous. Conclusions: Parameterization is possible in real time for the grip in extension based on surface electromyography and accelerometer, offering new analysis variables on hand operation while providing a suitable complement to standardized assessments.

• Implications for Rehabilitation

• The use of surface electromyography and accelerometry in the arm synchronously, allows clinicians to identify new intervention and treatment variables.

• The protocol developed can be used in clinical practice because it is non-invasive, the enabled devices do not cause damage on the subject.

• According to the results, the muscles of the hypothenar region and the first dorsal interosseous have greater activation in the hand during grip extension.

• The wrist extensor muscles and flexor carpi ulnaris have more activation during the approach phase to grip. These are the muscles that should be prioritized for rehabilitation.

• The variation of the acceleration allows you to differentiate between the phases of rest and movement of the hand. If the variation of the acceleration at rest is higher than 0.3g, this could indicate the presence of abnormal movements or tremor.

     

Ranges of active joint motion for the shoulder,elbow, and wrist in healthy adults

Purpose: The aim of this study was to show highly reliable normal values and three-dimensional characteristics for final range of motion during active movements of the upper extremity joints, and to develop a database from healthy participants, with the advantage of this database lying in the methods of defining shoulder axial rotation angle and of compensating for soft tissue artifacts. Methods: We used an electromagnetic tracking system (FASTRAK) to measure three-dimensional motions of the shoulder (thoracohumeral), elbow/forearm, and wrist in 20 healthy adults (age range: 18–34 years) during active joint motion tasks of the upper extremity. Results: Joint angles of the upper extremity at the final position of joint motion tasks were determined. Highly reliable data for shoulder axial rotation angle were obtained, using a new definition of joint angle and regression analysis to compensate for estimation errors. Conclusions: These results should be useful in setting goals for the treatment of upper extremity joint functions in the fields of rehabilitation, orthopedics, and sports medicine.

Implications for Rehabilitation

• Complex joint motions that occur naturally (unconsciously) about some axes should be taken into account in interventions for range of joint motion (ROM).

• The data obtained through this study simultaneously indicating multiple interrelated angles can be used as reference values for maximum active ROM.

• ROM in the directions of motion involved in the various tasks (for example, elevation angle during shoulder flexion) may have a role to play in evaluating and setting goals for patients with impaired ROM of the arm joints.

     

Safety and function of a prototype microprocessor-controlled knee prosthesis for low active transfemoral amputees switching from a mechanic knee prosthesis: a pilot study

Purpose: Aim of this pilot study was to assess safety and functioning of a microprocessor-controlled knee prosthesis (MPK) after a short familiarization time and no structured physical therapy.

Materials and methods: Five elderly, low-active transfemoral amputees who were fitted with a standard non-microprocessor controlled knee prosthesis (NMPK) performed a baseline measurement consisting of a 3?D gait analysis, functional tests and questionnaires. The first follow-up consisted of the same test procedure and was performed with the MPK after 4 to 6?weeks of familiarization. After being refitted to their standard NMPK again, the subjects undertook the second follow-up which consisted of solely questionnaires 4?weeks later.

Results: Questionnaires and functional tests showed an increase in the perception of safety. Moreover, gait analysis revealed more physiologic knee and hip extension/flexion patterns when using the MPK.

Conclusion: Our results showed that although the Genium with Cenior-Leg ruleset-MPK (GCL-MPK) might help to improve several safety-related outcomes as well as gait biomechanics the functional potential of the GCL-MPK may have been limited without specific training and a sufficient acclimation period.

• Implications for Rehabilitation

• Elderly transfemoral amputees are often limited in their activity by safety issues as well as insufficient functioning regarding the non microprocessor-controlled knee prostheses (NMPK), thing that could be eliminated with the use of suitable microprocessor-controlled prostheses (MPK).

• The safety and functioning of a prototype MPK (GCL-MPK) specifically designed for the needs of older and low-active transfemoral amputees was assessed in this pilot study.

• The GCL-MPK showed indicators of increased safety and more natural walking patterns in older and low-active transfemoral amputees in comparison to the standard NMPK already after a short acclimatisation time and no structured physical therapy.

• Regarding functional performance it seems as if providing older and low-active transfemoral amputees with the GCL-MPK alone without prescribing structured prosthesis training might be insufficient to achieve improvements over the standard NMPKs.

     

The validity of forceplate data as a measure of rapid and targeted volitional movements of the centre of mass in transtibial prosthesis users

Purpose: To validate outcome variables from the limits of stability protocol that are derived from the center of pressure with those same variables derived from the center of mass during rapid, volitional responses in transtibial prosthesis users.

Method: Prosthesis users (n?=?21) and matched controls (n?=?21) executed movements while force and motion data were collected. Correlation coefficients were used to investigate relationships between center of pressure and center of mass for: x/y coordinates positions, limits of stability outcome variables and muscular reaction times.

Results: Significant differences were seen in correlation between x/y coordinate positions toward the intact limb (mean effect size of differences: r?=?.38). Limits of stability variables were positively correlated (reaction time and maximum excursion range r_s: .585–.846; directional control and mean velocity range r_s: .307–.472). Muscular reaction times correlated weakly with those from center of pressure (mean r_s prosthesis users: .186 and controls: .101).

Conclusions: Forceplate measures are valid in describing rapid, volitional movements in unilateral transtibial prosthesis users. Limits of stability outcomes extracted from center of pressure and center of mass are highly correlated, but can be sensitive to direction. Muscular reaction time correlates very little with reaction times extracted from the other variables.

• Implications for rehabilitation

• Rehabilitation programs utilizing limits of stability are valid measures of postural control in transtibial prosthesis users.

• Clinicians interpreting the outcomes from limits of stability need to be aware of their varying validity.

• Muscular reaction times correlate weakly with other measures of reaction time, highlighting the complexity of rapidly coordinating volitional movements in prosthesis users.

     

The use of augmented auditory feedback to improve arm reaching in stroke: a case series

Purpose: After practice, augmented feedback is the most important factor that facilitates motor learning. We assess the potential effectiveness of two types of augmented auditory feedback on the re-learning of arm reaching in individuals with stroke: (a) real-time knowledge of performance (KP) feedback and (b) rhythmic cueing in the form of knowledge of results (KR) feedback. Method: Five participants with stroke underwent short-term practice, reaching with their affected arm with KP, KR and no feedback, on separate days. We assessed range of motion of the upper extremity (shoulder, elbow) and trunk, mean error and variability of the performed trajectory, and movement time, before and after training. Results: All participants benefitted from practice with feedback, though the effects varied across participants and feedback type. In three participants, KP feedback increased elbow extension and reduced compensatory trunk flexion. In four participants, KR feedback reduced movement time taken to perform the reach. Of note, one participant benefitted mostly from KP feedback, which increased shoulder flexion and elbow extension, and decreased compensatory trunk flexion and mean error. Conclusions: Within day practice with augmented auditory feedback improves reaching in individuals with stroke. This warrants further investigation with longer practice periods in a larger sample size.

• Implications for Rehabilitation

• After practice, augmented feedback is the second most important factor that facilitates motor learning.

• Music-based augmented auditory feedback has potential to enhance reaching abilities in individuals with stroke.

• Future studies are warranted to evaluate the long-term effectiveness of this feedback over a longer training period in a larger sample size.

     

Adaptations from the prosthetic and intact limb during standing on a sway-referenced support surface for transtibial prosthesis users

Abstract

Purpose: To investigate the bilateral postural adaptations as a result of standing on an increasingly unstable sway-referenced support surface with both the intact and prosthetic limb for transtibial prosthesis users (TPUs).

Method: TPUs (n = 14) and matched controls (n = 14) stood quietly in multiple foot placement conditions (intact foot, prosthetic foot and both feet) on a sway-referenced support surface which matched surface rotation to the movement of the centre of pressure (CoP). Force and motion data were collected and used to analyse CoP mean position, displacement integral and force components under intact and prosthetic limbs.

Results: Significant differences were found between prosthesis users and controls in CoP mean position in anteroposterior (1.5 (95% CI, 1.2–1.8) cm) and mediolateral directions (3.1 (95% CI, 0.5–5.7) cm. CoP displacement integrals were significantly different greater for prosthesis user group in the anteroposterior direction. Force components differences were found in all planes (anteroposterior: 0.6 (95% CI, 0.4–0.8 N); mediolateral: 0.1 (95% CI, 0.0–0.2 N & 0.3 (95% CI, 0.2–0.4) N, inferosuperior: 2.2 (95% CI, 1.4–3.0) N).

Conclusions: TPUs have bilateral static and dynamic postural adaptations when standing on a sway-referenced support surface that is different to controls, and between prosthetic and intact sides. Results further support evidence highlighting importance of the intact limb in maintenance of postural control in prosthesis users. Differences indicate clinical treatment should be directed towards improving outcomes on the intact side.

• Implications for rehabilitation

• Prosthesis users have bilateral adaptations when standing on a sway referenced support surface

• These adaptations are different to controls, and between prosthetic and intact sides.

• The intact limb is the major contributor to maintenance of postural control in prosthesis users.

• Clinical treatment should account for this when interventions are designed.

     

The effect of an isocentric reciprocating gait orthosis incorporating an active knee mechanism on the gait of a spinal cord injury patient: A single case study

Objective: The aim of this study was to identify the effect of induced knee flexion during gait on the kinematics and temporal-spatial parameters during walking by a patient with spinal cord injury (SCI) through the application of an isocentric reciprocating gait orthosis (IRGO) with a powered knee mechanism.

Methods: Two orthoses were considered and evaluated for an ISCI subject with a T8 level of injury. An IRGO was initially manufactured by incorporating drop lock knee joints and was fabricated with custom molded AFOs to block ankle motion. This orthosis was also adapted with electrically-activated knee joints to provide active knee extension and flexion when disengaged.

Results: Walking speed, stride length and cadence were increased 37.5%, 11% and 26%, respectively with the new orthosis as compared to using the IRGO. The vertical and horizontal compensatory motions reduced compared to mechanical IRGO. At end of stance phase, knee joint flexion was 37.5° for the AKIRGO compared to 7° of movement when walking with the IRGO. The overall pattern of walking produced was comparable to that of normal human walking.

Conclusion: Knee flexion during swing phase resulted in an improved gait performance and also reduction in compensatory motions when compared to a mechanical IRGO.

Implications for Rehabilitation

• Powered orthosis could be used by spinal cord injury subjects.

• A major advantage of this new orthotic mechanism was regeneration of knee movement closer to that of normal human walking.

• The IRGO with a powered knee joint mechanism improved the speed of walking, step length, cadence and vertical displacement in a spinal cord injury patient which also produced near-normal knee joint angle patterns during gait.

     

The efficacy of electrical stimulation in reducing the post-stroke spasticity: a randomized controlled study

Purpose: The purpose of this study is to evaluate the efficacy of surface electrical stimulation on the spasticity occurring in the wrist flexor muscles after a cerebrovascular event. Method: Hemiplegic patients with stage 2–3 spasticity in the wrist muscles based on the Ashworth scale were divided into two groups. Both groups were applied stretching. One group was additionally administered neuromuscular electrical stimulation (NMES) to the wrist extensors, in the form of pulsed current, 100 Hz, with a pulse duration of 0.1 msec, and a resting duration of 9 seconds, for 15 minutes to provide the maximum muscular contraction. The efficacy of the treatment was evaluated using the following: modified Ashworth scale (MAS), Fmax/Mmax ratio, Hmax/Mmax ratio, wrist extension range of motion (ROM). The daily activities were assessed by Functional Independence Measurement (FIM) and the motor recovery was evaluated by Brunnstrom motor staging. Results: Both groups revealed a significant recovery after the treatment based on the MAS, the electrophysiological evaluation results, wrist ROM, FIM and Brunnstrom motor staging. The group receiving the combined treatment showed a better recovery in terms of MAS, wrist ROM, FIM and Brunnstrom motor staging compared to the group doing the stretching alone. Conclusions: The results of this study showed that NMES given together with stretching of the wrist extensor muscles was more effective than stretching of the wrist extensor muscles alone in reducing spasticity.

Implications for Rehabilitation

• There is a wide range of treatment options for spasticity, from conservative treatments (medications, splint, physical treatment modalities, and exercise) to surgery.

• The efficacy of electrical stimulation in spasticity is still controversial.

• Electrical stimulation treatment applied together with wrist extensor muscles passive stretching exercise is effective in reducing spasticity.

     

Prosthesis rejection in acquired major upper-limb amputees: a population-based survey

Purpose: To estimate the rates of primary and secondary prosthesis rejection in acquired major upper-limb amputees (ULAs), to describe the most frequently reported reasons for rejection and to estimate the influence of background factors on the risk of rejection. Method: Cross-sectional study analysing population-based questionnaire data (n?=?224). Effects were analysed by logistic regression analyses and Cox regression analyses. Results: Primary prosthesis rejection was found in 4.5% whereas 13.4% had discontinued prosthesis use. The main reasons reported for primary non-wear were a perceived lack of need and discrepancies between perceived need and the prostheses available. The main reasons reported for secondary prosthesis rejection were dissatisfaction with prosthetic comfort, function and control. Primary prosthesis rejection was more likely in ULAs amputated at high age and in ULAs with proximal amputations. Secondary prosthesis rejection was more likely in proximal ULAs and in women. Conclusions: Clinicians should be aware of the increased risk of rejection in proximal ULAs, elderly ULAs and in women. Emphasising individual needs will probably facilitate successful prosthetic fitting. Improved prosthesis quality and individualised prosthetic training may increase long-term prosthesis use. Further studies of the effect of prosthetic training and of the reasons for rejection of different prosthetic types are suggested.

Implications for Rehabilitation

• Most acquired major upper-limb amputees (ULAs) are fitted with prostheses after the amputation.

• This population-based study shows that proximal ULAs, elderly ULAs and women have an increased risk of prosthesis rejection.

• Emphasising individual needs may facilitate successful prosthetic fitting.

• Improved prosthesis quality and individualised prosthetic training may increase long-term prosthesis use.

     

Musculoskeletal complaints in individuals with finger or partial hand amputations in the Netherlands: a cross-sectional study

Purpose: To compare the prevalence of musculoskeletal complaints (MSCs) in individuals with finger or partial hand amputations (FPHAs) with a control group and to explore the effect and predictors of MSCs in individuals with FPHAs.

Method: A questionnaire-based cross-sectional study was conducted. The primary outcome measures were: prevalence of MSCs, health status, pain-related disability, physical work demands, work productivity, and hand function.

Results: The response rate was 61%. A comparable proportion of individuals with FPHAs (n?=?99) and controls (n?=?102) reported MSCs in the preceding 4 weeks (33% vs. 28%, respectively) or in the preceding year (37% vs. 33%, respectively). Individuals with FPHAs with MSCs experienced more pain than controls with MSCs. Regular occurrence of stump sensations and self-reported limited range of motion (ROM) of the wrist of the affected limb were predictors for MSCs in individuals with FPHAs.

Conclusions: The prevalence of MSCs was comparable in individuals with FPHAs and controls. However, clinicians should pay special attention to the risk of developing MSCs in patients with stump sensations and limited ROM of the wrist of the affected limb. Future research should focus on the role of wrist movements and compensatory movements in the development of MSCs in individuals with FPHAs.

• Implications for Rehabilitation

• The prevalence of musculoskeletal complaints (MSCs) in individuals with finger or partial hand amputations (FPHAs) and control subjects was similar.

• Regular occurrence of stump sensations and limited range of motion of the wrist of the affected limb were predictors of developing MSCs in individuals with FPHAs.

• Clinicians should pay special attention to individuals with FPHAs with the presence of these predictors of developing MSCs.

• For a better understanding of the development of and treatment options for MSCs, future research focusing on the role of wrist function in the development of MSCs in individuals with FPHAs is necessary.

     

Bilateral movements increase sustained extensor force in the paretic arm

Purpose: Muscle weakness in the extensors poststroke is a common motor impairment. Unfortunately, research is unclear on whether bilateral movements increase extensor force production in the paretic arm. This study investigated sustained force production while stroke individuals maximally extended their wrist and fingers on their paretic arm. Specifically, we determined isometric force production in three conditions: (a) unilateral paretic arm, (b) unilateral nonparetic arm, and (c) bilateral (both arms executing the same movement simultaneously).

Methods: Seventeen chronic stroke patients produced isometric sustained force by executing wrist and fingers extension in unilateral and bilateral contraction conditions. Mean force, force variability (coefficient of variation), and signal-to-noise ratio were calculated for each contraction condition.

Results: Analysis of two-way (Arm?×?Type of Condition: 2?×?2; Paretic or Nonparetic Arm?×?Unilateral or Bilateral Conditions) within-subjects ANOVAs revealed that the bilateral condition increased sustained force in the paretic arm, but reduced sustained force in the nonparetic arm. Further, although the paretic arm exhibited more force variability and less signal-to-noise ratio than the nonparetic arm during a unilateral condition, there were no differences when participants simultaneously executed isometric contractions with both arms.

Conclusions: Our unique findings indicate that bilateral contractions transiently increased extensor force in the paretic arm.

• Implications for Rehabilitation

• Bilateral movements increased isometric wrsit extensor force in paretic arms and redcued force in nonparetic arms versus unilateral movements.

• Both paretic and nonparetic arms produced similar force variability and signal-to-noise ratio during bilateral movements.

• Increased sustained force in the paretic arm during the bilateral condition indicates that rehabilitation protocols based on bilateral movements may be beneficial for functional recovery.

     

Controlling a multi-degree of freedom upper limb prosthesis using foot controls: user experience

Abstract

Purpose: The DEKA Arm, a pre-commercial upper limb prosthesis, funded by the DARPA Revolutionizing Prosthetics Program, offers increased degrees of freedom while requiring a large number of user control inputs to operate. To address this challenge, DEKA developed prototype foot controls. Although the concept of utilizing foot controls to operate an upper limb prosthesis has been discussed for decades, only small-sized studies have been performed and no commercial product exists. The purpose of this paper is to report amputee user perspectives on using three different iterations of foot controls to operate the DEKA Arm. Method: Qualitative data was collected from 36 subjects as part of the Department of Veterans Affairs (VA) Study to Optimize the DEKA Arm through surveys, interviews, audio memos, and videotaped sessions. Three major, interrelated themes were identified using the constant comparative method: attitudes towards foot controls, psychomotor learning and physical experience of using foot controls. Results: Feedback about foot controls was generally positive for all iterations. The final version of foot controls was viewed most favorably. Conclusions: Our findings indicate that foot controls are a viable control option that can enable control of a multifunction upper limb prosthesis (the DEKA Arm).

• Implications for Rehabilitation

• Multifunction upper limb prostheses require many user control inputs to operate. Foot controls offer additional control input options for such advanced devices, yet have had minimal study.

• This study found that foot controls were a viable option for controlling multifunction upper limb prostheses. Most of the 36 subjects in this study were willing to adopt foot controls to control the multiple degrees of freedom of the DEKA Arm.

• With training and practice, all users were able to develop the psychomotor skills needed to successfully operate food controls. Some had initial difficulty, but acclimated over time.

     

Explicit motor sequence learning with the paretic arm after stroke

Purpose: Motor sequence learning is important for stroke recovery, but experimental tasks require dexterous movements, which are impossible for people with upper limb impairment. This makes it difficult to draw conclusions about the impact of stroke on learning motor sequences. We aimed to test a paradigm requiring gross arm movements to determine whether stroke survivors with upper limb impairment were capable of learning a movement sequence as effectively as age-matched controls.

Materials and methods: In this case-control study, 12 stroke survivors (10–138 months post-stroke, mean age 64 years) attempted the task once using their affected arm. Ten healthy controls (mean 66 years) used their non-dominant arm. A sequence of 10 movements was repeated 25 times. The variables were: time from target illumination until the cursor left the central square (onset time; OT), accuracy (path length), and movement speed.

Results: OT reduced with training (p?p?>?0.1). We quantified learning as the OT difference between the end of training and a random sequence; this was smaller for stroke survivors than controls (p?=?0.015).

Conclusions: Stroke survivors can learn a movement sequence with their paretic arm, but demonstrate impairments in sequence specific learning.

• Implications for Rehabilitation

• Motor sequence learning is important for recovery of movement after stroke.

• Stroke survivors were found to be capable of learning a movement sequence with their paretic arm, supporting the concept of repetitive task training for recovery of movement.

• Stroke survivors showed impaired sequence specific learning in comparison with age-matched controls, indicating that they may need more repetitions of a sequence in order to re-learn movements.

• Further research is required into the effect of lesion location, time since stroke, hand dominance and gender on learning of motor sequences after stroke.

     

Rehab@home: a tool for home-based motor function rehabilitation

Purpose: This paper presents the Rehab@home system, a tool specifically developed for helping neurological patients performing rehabilitation exercises at home, without the presence of a physiotherapist. It is centred on the rehabilitation of balance and on the sit-to-stand (STS) movement. Method: Rehab@home is composed of two Wii balance boards, a webcam and a computer, and it has two main software applications: one for patients to perform rehabilitation exercises and another one for therapists to visualize the data of the exercises. During the exercises, data from the boards and the webcam are processed in order to automatically assess the correctness of movements. Results: Rehab@home provides exercises for the rehabilitation of balance (in sitting and in standing positions), and for the execution of the STS movement. It gives automatic feedback to the patient and data are saved for future analysis. The therapist is able to adapt the difficulty of the exercises to match with each patient's needs. A preliminary study with seven patients was conducted for evaluating their feedback. They appreciated using the system and felt the exercises more engaging than conventional therapy. Conclusions: Feedback from patients gives the hope that Rehab@home can become a great tool for complementing their rehabilitation process.

• Implications for Rehabilitation

• Rehab@home can be used at home by patients with motor deficits, without the presence of a therapist, as a complement to conventional therapy for accelerating the rehabilitation process.

• The system provides exercises for improving the balance and the STS movement capabilities of patients, gives automatic feedback, and saves video and load information from the movements for future analysis by the therapist.

• Its most important feature is adaptability: the therapist is able to tune the difficulty of the exercises for adapting them to the needs of each patient.

• Patients get more engaged for this type of exercises and think they can take profit from using it.

     

Living as a person using a lower-limb prosthesis in Nepal

Purpose: The purpose of this study is to explore experiences of persons in Nepal using lower-limb prostheses, in relation to specific articles in the Convention on the Rights of Persons with Disabilities that consider mobility, education, health, rehabilitation, and work and employment.

Method: Qualitative interviews were conducted with 16 persons using lower limb prostheses. Content analysis was applied to the data.

Results: Six themes emerged: The lower-limb prosthesis is essential for mobility and daily life; Limited mobility in challenging terrain and request for reduced pain when using prosthesis; Difficulties in finding and sustaining employment emphasized the importance of vocational training; Appreciation of comprehensive rehabilitation together with other persons with amputations, but covering related costs is a struggle; Satisfied with health care, but concerned that it creates debt and dependence upon others; and finally, Limited ability creates negative self-image and varied attitudes in other people.

Conclusion: Persons with lower-limb amputations were restricted by poverty and wanted increased independence. Rehabilitation and prosthetic services in Nepal need to increase proportionally as they contribute to enabling those persons to a better daily life. Prostheses were essential but more advanced technology was requested. Access to education and vocational training has the potential to improve the socio-economic status of those with lower-limb amputations due lack of employment not requiring physical effort.

• Implications for rehabilitation

• To increase access for persons with lower-limb amputations in Nepal to rehabilitation services, these services need to increase proportionally, and the policy for financial compensation to enable those persons to afford transportation to the rehabilitation center should be implemented.

• The design and manufacture of the low-cost polypropylene technology for prostheses used in Nepal needs to be improved, directed towards increasing the ability to ambulate on uneven surfaces and hilly terrain, and the ability to walk long distances.

• Adjustments of employment for persons with physical disabilities in Nepal have the potential to strengthen their socio-economic status.

• Vocational training programs and educational opportunities for persons with physical disabilities have the potential to improve income-generating employment and need to increase proportionally in Nepal.

• The policies developed in accordance with the Convention on the Rights of Persons with Disabilities need to be further implemented to decrease existing barriers to access to general health care and rehabilitation and prosthetic services for persons with disabilities in Nepal.

     

The therapeutic role of motor imagery on the functional rehabilitation of a stage II shoulder impingement syndrome

Abstract

Purpose: Motor imagery (MI) has been used as a complementary therapeutic tool for motor recovery after central nervous system disease and peripheral injuries. However, it has never been used as a preventive tool. We investigated the use of MI in the rehabilitation of stage II shoulder impingement syndrome. For the first time, MI is used before surgery. Method: Sixteen participants were randomly assigned to either a MI or control group. Shoulder functional assessment (Constant score), range of motion and pain were measured before and after intervention. Results: Higher Constant score was observed in the MI than in the control group (p?=?0.04). Participants in the MI group further displayed greater movement amplitude (extension (p?<?0.001); flexion (p?=?0.025); lateral rotation (p?<?0.001). Finally, the MI group showed greater pain decrease (p?=?0.01). Conclusion: MI intervention seems to alleviate pain and enhance mobility, this is probably due to changes in muscle control and consequently in joint amplitude. MI might contribute to postpone or even protect from passing to stage III that may require surgery.

• Implications for Rehabilitation

• Adding motor imagery training to classical physical therapy in a stage II impingement syndrome:

• Helps in alleviating pain

• Enhances shoulder mobility

• Motor imagery is a valuable technique that can be used as a preventive tool before the stage III of the impingement syndrome.

     

The effects of a new designed forearm orthosis in treatment of lateral epicondylitis

Purpose: This paper reports on the design and testing of a new designed forearm orthosis and explores its efficacious in comparison to the standard counterforce orthosis in patients with lateral epicondylitis. Method: Twenty-four patients were enrolled in this assessor-blinded clinical trial and randomly assigned to two parallel treatment groups. The measures of pain and function, the pain threshold and grip strength were compared using patient rated tennis elbow evaluation (PRTEE) form, algometer and dynamometer respectively at baseline and 4 weeks after treatment. Paired and independent t-test statistical methods recruited for within and between groups comparisons respectively. Results: The both orthoses, counterforce and new-designed, significantly relieved pain, and improved function, pain threshold and grip strength of all patients after 4 weeks application. The new-designed orthosis seemed to be more effective than the counterforce orthosis in pain relief, but there was not any significant difference in efficacious of two types of orthoses regarding function. Conclusions: The new-designed orthosis can significantly relieve pain, improve function, increase pain threshold and grip strength after application. This orthosis seemed to be more effective than counterforce orthosis in relieving pain and increasing the pain threshold probably due to the limitation of forearm supination.

Implications for Rehabilitation

• Several orthoses have been prescribed in the literature to decrease pain and inflammation of the lateral epicondylitis.

• The new-designed forearm orthosis is composed of wrist and below elbow counterforce straps that are connected by a non flexible middle part.

• The new-designed orthosis was better than counterforce orthosis in relieving pain and increasing pain threshold.

     

Evaluation of hand orthoses in Duchenne muscular dystrophy

Abstract

Purpose: The purpose of this study was to evaluate whether treatment of boys with Duchenne muscular dystrophy using hand orthoses could benefit joint mobility, grip strength, or fine motor function.

Method: Eight boys with Duchenne muscular dystrophy were provided with individually customised rest orthoses. The results were analysed using single-subject design. The study included a baseline and an intervention phase. A follow-up examination was also performed.

Results: Boys with less than 50° passive wrist extension mobility were included. Wrist extension of the dominant hand increased in four and was maintained in four. Wrist extension in the non-dominant hand increased in five, was maintained in two and decreased in one. Thumb abduction in the dominant hand increased in six and two remained stable. In the non-dominant hand five increased and three remained stable. Grip strength and fine motor function showed also positive results.

Conclusions: This study indicates that the use of hand orthoses in Duchenne muscular dystrophy can delay development of contractures and improve passive wrist extension and thumb abduction. Hand orthoses can therefore be recommended for boys who start to develop contractures in the long finger flexors. Due to small sample size further studies are needed to confirm this result.

• Implications for rehabilitation

• Evaluation of hand orthoses in Duchenne muscular dystrophy.

• Preserved hand function is of uttermost importance for performance of activities in the late stages of Duchenne muscular dystrophy.

• Contractures of long finger flexors affect hand function and limit performance of daily activities.

• Hand orthoses can delay development of contractures and preserve hand function and give prerequisites for independence.

• The occupational therapists should measure wrist joint mobility regularly to be able to find the right time for intervention with hand orthoses in this progressive disorder.