Standing balance in persistent whiplash: a comparison between subjects with and without dizziness.

OBJECTIVE: Dizziness and unsteadiness, associated with altered balance, are frequent complaints in subjects suffering persistent whiplash associated disorders. Research has been inconclusive with respect to possible aetiology. This study assessed balance responses in subjects with whiplash associated disorders, taking into account several possible causes. DESIGN: A prospective, 3 group, observational design.Subjects: 100 subjects with persistent whiplash associated disorders, 50 complaining of dizziness, 50 not complaining of dizziness and 50 healthy controls. METHODS: The Clinical Test for Sensory Interaction in Balance was performed in both comfortable and tandem stance. The sway trace was analysed using wavelet analysis. CONCLUSION: The results indicated that the energy of the sway signal for comfortable stance tests was significantly greater in the group with dizziness compared with the group without dizziness. In the group without dizziness the energy was greater than controls for all tests, but significantly different on selected tests. In selected tandem stance tests, subjects with dizziness were significantly less able to complete the test than subjects without dizziness and controls. These deficits could not be attributed to medications, compensation, anxiety or age and are likely to be due to disturbances to the postural control system possibly originating from abnormal cervical afferent input.     

The association between cognitive factors,pain and disability in patients with idiopathic chronic neck pain

Purpose.?The aim of this study was to establish the relationship between known cognitive factors and levels of pain and disability in patients with idiopathic chronic neck pain.

Method.?Ninety-four patients referred for physiotherapy because of chronic neck pain completed measures of pain, disability, catastrophising, pain-related fear, pain vigilance and awareness and self-efficacy beliefs. Hierarchical multiple regression analyses were then performed to establish whether the cognitive factors were significant determinants of levels of pain and disability.

Results.?The cognitive measures were significantly related to levels of pain and disability, explaining 23% of the variance in pain intensity and 30% of the variance in disability. Specifically, greater catastrophising (β?=?0.37, p?<?0.05) and lower pain vigilance and awareness (β?=???0.32, p?<?0.05) were associated with greater pain intensity. Moreover, greater catastrophising (β?=?0.26, p?<?0.05) and lower functional self-efficacy beliefs (β?=???0.34, p?<?0.001) were significantly associated with greater levels of disability.

Conclusions.?Cognitive factors were strongly related to levels of pain and disability in patients with chronic neck pain. In view of this, targeting the modification of these cognitive factors should be an integral part of therapy when treating patients with idiopathic chronic neck pain.     

Prognosis of acute idiopathic neck pain is poor: a systematic review and meta-analysis

Hush JM, Lin CC, Michaleff ZA, Verhagen A, Refshauge KM. Prognosis of acute idiopathic neck pain is poor: a systematic review and meta-analysis.

Objective

To conduct a systematic review and meta-analysis on the prognosis of acute idiopathic neck pain and disability.

Data Sources

EMBASE, CINAHL, Medline, AMED, PEDro, and CENTRAL were searched from inception to July 2009, limited to human studies. Reference lists of relevant systematic reviews were searched by hand. Search terms included: neck pain, prognosis, inception, cohort, longitudinal, observational, or prospective study and randomized controlled trial.

Study Selection

Eligible studies were longitudinal cohort studies and randomized controlled trials with a no treatment or minimal treatment arm that recruited an inception cohort of acute idiopathic neck pain and reported pain or disability outcomes. Eligibility was determined by 2 authors independently. Seven of 20,085 references were included.

Data Extraction

Pain and disability data were extracted independently by 2 authors. Risk of bias was assessed independently by 2 authors.

Data Synthesis

Statistical pooling showed a weighted mean pain score (0–100) of 64 (95% confidence interval [CI], 61–67) at onset and 35 (95% CI, 32–38) at 6.5 weeks. At 12 months, neck pain severity remained high at 42 (95% CI, 39–45). Disability reduced from a pooled weighted mean score (0–100) at onset of 30 (95% CI, 28–32) to 17 (95% CI, 15–19) by 6.5 weeks, without further improvement at 12 months. Studies varied in length of follow-up, design, and sample size.

Conclusions

This review provides Level I evidence that the prognosis of acute idiopathic neck pain is worse than currently recognized. This evidence can guide primary care clinicians when providing prognostic information to patients. Further research to identify prognostic factors and long-term outcomes from inception cohorts would be valuable.     

Standing balance training: effect on balance and locomotion in hemiparetic adults

The effects of balance retraining on standing balance and locomotor performance were examined in postacute hemiparetic adults. Balance during habitual and instructed-even standing, as well as locomotor performance, were measured before and after a three- to four-week treatment period. Two groups of 21 matched subjects participated in physical therapy. One group received standing balance training with a specially designed feedback device that provided dynamic visual information about relative weight distribution over the paretic and nonparetic limb. Subjects trained with the feedback device showed significantly better static standing symmetry than did subjects who did not receive augmented feedback, p less than .05. Although both groups improved significantly in gait velocity, cadence, stride length, and cycle time, p less than .01, the initially identified asymmetrical locomotor pattern appeared to be only minimally affected by the standing balance training. Results indicated that although standing balance and locomotor control mechanisms may be highly interrelated, a reduction in standing balance asymmetry does not necessarily lead to a concomitant reduction in the asymmetrical limb movement patterns associated with hemiparetic locomotion.     

Immediate effects of dry needling on pain sensitivity and pain modulation in patients with chronic idiopathic neck pain: a single-blinded randomized clinical trial

BackgroundDry needling is frequently used for the treatment of neck pain but knowledge about its neurophysiological central effects is scarce.ObjectivesTo compare the immediate effects of a single session of dry needling (DN) and sham needling (SN) on local and distant pressure pain thresholds and conditioned pain modulation in patients with chronic idiopathic neck pain.MethodParticipants with chronic idiopathic neck pain were randomly allocated to a DN or SN group. The primary outcome measure was the pressure pain threshold (PPT) at one peripheral location: quadriceps muscle (Q). Secondary outcome measures were local PPTs at the treated (most painful) (tUT) and non-treated upper trapezius muscle (ntUT), absolute and relative conditioned pain modulation (CPM) effects and pain during hot water immersion. Patients were assessed at baseline and immediately post intervention. Linear mixed models were used to examine interaction effects as well as between- and within-group differences.ResultsFifty-four participants were included for statistical analysis. Linear mixed model analyses showed no significant “group X time” interaction effects for any of the outcome measures. The relative CPM effect at the Q was significantly higher post-intervention, compared to baseline within the DN group (mean difference= 13.52%; 95% CI: 0.46, 26.59).ConclusionThe present study shows no superior effect of DN, compared to SN, in the immediate effect on local and distant PPTs and CPM in patients with chronic idiopathic neck pain.     

The association between a lifetime history of a work-related neck injury and future neck pain: a population based cohort study

Objective

The purpose of this study was to investigate the association between a lifetime history of a work-related neck injury and the development of troublesome neck pain in the general population.

Methods

We formed a cohort of randomly sampled Saskatchewan adults with no or mild neck pain in September 1995. At baseline, participants were asked if they had ever injured their neck at work. Six and 12 months later, participants were asked if they had troublesome neck pain defined as grades II to IV on the Chronic Pain Grade Questionnaire. Multivariable Cox regression was used to estimate the association between a lifetime history of work-related neck injury and the onset of troublesome neck pain while controlling for age and sex.

Results

Our cohort included 866 individuals at risk for developing troublesome neck pain. Of those, 73.8% (639/866) were followed up at 6 months, and 63.0% (546/866), at 1 year. We found a positive association between a history of a work-related neck injury and the onset of troublesome neck pain (age- and sex-adjusted hazard rate ratio [HRR], 2.4; 95% confidence interval, 1.3-4.7).

Conclusion

Our analysis suggests that a lifetime history of work-related neck injury is associated with an increased risk of troublesome neck pain. Occupational neck injuries can lead to recurrent episodes of neck pain.     

Sensory hypoaesthesia is a feature of chronic whiplash but not chronic idiopathic neck pain

Both sensory hypersensitivity and hypoaesthesia are features of chronic whiplash associated disorders (WAD). Sensory hypersensitivity is not a consistent feature of chronic idiopathic (non-traumatic) neck pain but the presence of hypoaesthesia has not been investigated. This study compared the somatosensory phenotype of whiplash and idiopathic neck pain. Comprehensive Quantitative Sensory Testing (QST) including both detection and pain thresholds as well as psychological distress were measured in 50 participants with chronic WAD, 28 participants with chronic idiopathic neck pain and 31 healthy controls. The whiplash group demonstrated lowered pressure pain thresholds (PPTs) at all sites compared to the controls (p < 0.01) but there was no difference between the two neck pain groups (p > 0.05) except at the tibialis anterior site (p = 0.02). The whiplash group demonstrated lowered cold pain thresholds compared to idiopathic and control groups (p < 0.03). For detection thresholds, the whiplash group showed elevated vibration (p < 0.04), heat (p < 0.02) and electrical (p < 0.04) thresholds at all upper limb sites compared to the idiopathic neck pain group and the controls (p < 0.04). Sensory hypoesthesia whilst present in chronic whiplash is not a feature of chronic idiopathic neck pain. These findings indicate that different pain processing mechanisms underlie these two neck pain conditions and may have implications for their management.     

Impairment in the cervical flexors: a comparison of whiplash and insidious onset neck pain patients

There has been little investigation into whether or not differences exist in the nature of physical impairment associated with neck pain of whiplash and insidious origin. This study examined the neck flexor synergy during performance of the cranio-cervical flexion test, a test targeting the action of the deep neck flexors. Seventy-five volunteer subjects participated in this study and were equally divided between Group 1, asymptomatic control subjects, Group 2, subjects with insidious onset neck pain and Group 3, subjects with neck pain following a whiplash injury. The cranio-cervical flexion test was performed in five progressive stages of increasing cranio-cervical flexion range. Subjects' performance was guided by feedback from a pressure sensor inserted behind the neck which monitored the slight flattening of the cervical lordosis which occurs with the contraction of longus colli. Myoelectric signals (EMG) were detected from the muscles during performance of the test. The results indicated that both the insidious onset neck pain and whiplash groups had higher measures of EMG signal amplitude (normalized root mean square) in the sternocleidomastoid during each stage of the test compared to the control subjects (all P<0.05) and had significantly greater shortfalls from the pressure targets in the test stages (P<0.05). No significant differences were evident between the neck pain groups in either parameter indicating that this physical impairment in the neck flexor synergy is common to neck pain of both whiplash and insidious origin.     

An investigation to determine the association between neck pain and upper limb disability for patients with non-specific neck pain: a secondary analysis

This study investigated the relationship between neck pain and upper limb disability in patients with non-specific neck pain (n = 151) recruited from physiotherapy departments in the United Kingdom. Baseline neck pain/disability was measured using the Northwick Park Neck Pain Questionnaire (NPQ). Baseline upper limb disability was measured using the Disabilities of Arm, Shoulder, Hand questionnaire (DASH). A range of baseline psychosocial variables were measured as potential confounding variables. Pairwise analysis revealed a positive correlation between NPQ score and DASH score (Pearsons’ r = 0.799, p < 0.001). After adjusting for potential confounding variables, stepwise linear regression indicated that increasing upper limb disability was predicted by two baseline variables: higher NPQ scores (B = 0.743) and lower pain self efficacy (PSE) scores (B = −0.489) {R² = 0.713; n = 100, p < 0.001}. This study provides preliminary evidence that patients with severe neck pain/disability also report severe upper limb disability. The relationship between neck pain/disability and upper limb disability was mediated by PSE. Clinically, the presence of severe neck pain or low PSE should direct clinicians towards an assessment of upper limb function. In these cases upper limb disability may need to be addressed as part of the neck management process.     

The influence of neck pain on balance and gait parameters in community-dwelling elders

Neck pain has been shown to be associated with balance disturbances. Balance and gait speed are also known to decline with ageing. The aim of this study was to determine whether the presence of neck pain was associated with a decline in postural stability and gait speed over and above what is expected with normal ageing. Twenty female subjects with idiopathic neck pain and 20 healthy female controls aged between 65 and 82 years were studied. Subjects performed balance tests on a computerised force plate under conditions of eyes open, eyes closed on firm and soft surfaces in comfortable and narrow stance. Sway energy and root mean square (RMS) amplitude of sway were measured. Subjects also undertook a Timed Ten Metre Walk Test, with and without head turning.There were trends for the elderly group with neck pain to have poorer balance than the healthy controls across most balance conditions, although differences were significant only in the following tests; comfortable stance—eyes closed on a firm surface (p=0.02), eyes open on a soft surface (p=0.01); narrow stance—eyes open on a firm surface (p=0.02). In the Timed Ten meter Walk Test, elderly subjects with neck pain had a slower self-selected gait speed (p=0.02) and cadence (p=0.04) in the head turn condition, as well as a longer gait cycle duration both with (p=0.00) and without head turns (p=0.04). The results of this study suggest that neck pain in the elderly may contribute to some disturbance in balance and gait parameters over and above that which occurs with normal ageing.     

电视腹腔镜胆囊切除128例无胆道损伤并发症

1993年10月至1997年1月，应用电视腹腔镜进行胆囊切除术128例，无一例胆道损伤并发症。128例中有12例因Calot三角区严重粘连或胆囊完全萎缩或因既往手术史而致腹腔内广泛粘连而中转开腹，1例放置腹腔引流管，但24小时仅引出不足10ml淡血性液体，全组病例无一例胆道损伤，术中术后均未发生其他并发症，术后住院3天～7天，约10天可恢复正常工作，这一高新科技手术适应于腹腔和胆囊周围无广泛粘连的病例，其最大的优点是创伤小，疼痛轻微，胃肠道功能恢复快，康复时间短。     

Standing balance responses in two populations of elderly women: a pilot study

A pilot study was conducted into the forces imposed on an instrumented, hand-held frame by two groups of elderly females. One group had been identified as having idiopathic gait disorders, and each subject had a history of falling for no apparent clinical reason. Tests were carried out to compare the responses of the two groups to single-leg-stance balance maneuvers. Results suggested that the "fallers" required greater support during single-leg stance. It was inferred that the fallers displaced their body mass more laterally during this procedure than was the case with the control group. Fallers applied greater forces to the frame with their eyes closed than with their eyes open; the control group did not show significant differences in this respect. These findings may help to define some of the biomechanical problems associated with idiopathic gait disorders.     

Measurement of reported pain of childbirth: a comparison between Australian and Italian subjects

A group of 22 Australian-born mothers, 10 mothers born in Italy and 8 born in Australia of Italian parents, were tested using the Present Pain Index, the Pain Rating Index (Ranking) and the Number of Words Chosen index from the McGill Pain Questionnaire. This questionnaire consists of words that can be used to describe and measure the intensity of the pain by using weighted words that have a sensory, an evaluative and an affective component. The subjects were mothers in the same maternity ward of a suburban public hospital. No statistically significant results were obtained.     

Widespread sensory hypersensitivity is a feature of chronic whiplash-associated disorder but not chronic idiopathic neck pain

OBJECTIVES: To investigate sensory changes present in patients with chronic whiplash-associated disorders and chronic idiopathic neck pain using a variety of quantitative sensory tests to better understand the pain processing mechanisms underlying persistent symptoms. METHODS: A case control study was used with 29 subjects with chronic whiplash-associated disorders, 20 subjects with chronic idiopathic neck pain, and 20 pain-free volunteers. Pressure pain thresholds were measured over the articular pillars of C2-C3, C5-C6, the median, radial, and ulnar nerve trunks in the arm and over a remote site, the muscle belly of tibialis anterior. Heat pain thresholds, cold pain thresholds, and von Frey hair sensibility were measured over the cervical spine, tibialis anterior, and deltoid insertion. Anxiety was measured with the Short-Form of the Spielberger State Anxiety Inventory. RESULTS: Pressure pain thresholds were decreased over cervical spine sites in both subject groups when compared with controls (P < 0.05). In the chronic whiplash-associated disorders group, pressure pain thresholds were also decreased over the tibialis anterior, median, and radial nerve trunks (P < 0.001). Heat pain thresholds were decreased and cold pain thresholds increased at all sites (P < 0.03). No differences in heat pain thresholds or cold pain thresholds were evident in the idiopathic neck pain group at any site compared with the control group (P > 0.27). No abnormalities in von Frey hair sensibility were evident in either neck pain group (P > 0.28). DISCUSSION: Both chronic whiplash-associated disorders and idiopathic neck pain groups were characterized by mechanical hyperalgesia over the cervical spine. Whiplash subjects showed additional widespread hypersensitivity to mechanical pressure and thermal stimuli, which was independent of state anxiety and may represent changes in central pain processing mechanisms. This may have implications for future treatment approaches.     

Headache and neck pain: Gabapentin as a possible treatment

Pain is a common situation and it is one of the most frequent presenting symptoms of different pathologies. Treating pain could be a precise request to the doctor, from the patient and his caregiver. Management of neuropathic pain is particularly challenging and many patients presenting with chronic or subacute head and neck pain need a multidisciplinary approach. The principal targets of effective pain control are to ameliorate nociception, to reduce threshold of pain sensation and to improve quality of life. We offer a panoramic view of nociception, from a central perspective, and discuss various pharmacological options available to treat headache and neck pain. We also debate the role of a new antiepileptic drug, gabapentin, in the management of headache and neck pain. It is now considered to be an emergent treatment for pain syndrome. We delineate its pharmacological, laboratory and clinical profiles, with a review of the world literature. Received: 29 December 1999 / Accepted in revised form: 30 June 2000     

Back pain during pregnancy and living conditions: a comparison between Beninese and Canadian women

ObjectiveThe objective of this exploratory study was to investigate and underline the contrasts between African and Canadian pregnant women, and their living conditions. We also intended to evaluate how they compared on low back pain, a condition that seems common across all pregnant women everywhere in the world.Subjects and methodThirty Beninese and 50 Canadian women were surveyed with demographic disability questionnaires O.D.I at approximately 25 weeks of pregnancy.ResultsThere were large differences between the two groups due to the differences between the life style. Beninese women were more likely to be self-employed or housewives, while Canadian women were more likely to be employed. Beninese women worked for 18 hours more per week, and had on average one more child at home. A higher percentage of Beninese women reported back pain, 83% versus 58% for Canadian women, but the disability scores were in the “moderate disability” range for both groups. A higher percentage of Beninese women also reported at least severe disability, 33% versus 14% for Canadian women.ConclusionThe results suggest that the higher percentages of Beninese women affected by back pain and by severe back pain is related to the longer hours worked and more strenuous physical work performed.     

Relationships between sagittal postures of thoracic and cervical spine,presence of neck pain,neck pain severity and disability

This was a cross-sectional correlation study to explore the relationships between sagittal postures of thoracic and cervical spine, presence of neck pain, neck pain severity and disability. Moreover, the reliability of the photographic measurement of the sagittal posture of thoracic and cervical spine was investigated. Forty-five subjects without neck pain and forty-seven subjects with neck pain were recruited. Using a photographic method, the sagittal thoracic and cervical postures were measured by the upper thoracic and the craniovertebral (CV) angles respectively. The Numeric Pain Rating Scale (NPRS) and Chinese version Northwick Park Neck Pain Questionnaire (NPQ) were used to assess neck pain severity and disability. The upper thoracic angle was positively correlated (r_s = 0.63, p < 0.01) while the CV angle was negatively correlated (r_s = ?0.56, p < 0.01) with the presence of neck pain. The upper thoracic angle was negatively correlated with the CV angles (r_s = ?0.62, p < 0.01) in subjects with neck pain. Similar to the CV angle, the upper thoracic angle was moderately correlated with the neck pain severity (r_s = 0.43, p = 0.01) and disability (r_s = 0.44, p = 0.02). The upper thoracic angle (OR = 1.37, p < 0.01) was a good predictor for presence of neck pain even better than that of the CV angle (OR = 0.86, p = 0.04).     

Differences in isometric neck muscle strength between healthy controls and women with chronic neck pain: the use of a reliable measurement

Cagnie B, Cools A, De Loose V, Cambier D, Danneels L. Differences in isometric neck muscle strength between healthy controls and women with chronic neck pain: the use of a reliable measurement.

Objectives

To determine the intra- and interrater reliability of the Biodex isokinetic dynamometer to measure the maximal isometric strength of the cervical flexors and extensors, to develop an age- and sex-based normative database in a healthy population, and to evaluate the differences in neck strength between women with chronic neck pain and healthy controls.

Design

Cross-sectional.

Setting

Physical and rehabilitation medicine department.

Participants

Ninety-six healthy volunteers (4 age groups: 20-29, 30-39, 40-49, 50-59y; each consisting of 12 men and 12 women) and 30 women with chronic neck pain.

Interventions

Not applicable.

Main Outcome Measures

Peak isometric strength of the cervical muscles was tested for flexion and extension by using the Biodex isokinetic dynamometer. The intra- and interrater reliability of the protocol was evaluated in 12 volunteers.

Results

The reliability for strength was high for both flexion and extension (intraclass correlation coefficient, .92-.96). The mean peak torque for flexion and extension was significantly higher in men (24Nm, 36.4Nm, respectively) compared with women (16.6Nm, 26.5Nm, respectively) (P<.001). Peak torque production for extension was significantly lower in the patient group (22.3Nm) compared with the healthy female control group (26.5Nm) (P=.003). No significant differences in flexion strength between patient and female control group were found.

Conclusions

Results show a high degree of intra- and interrater reliability in measuring isometric neck muscle strength when using the Biodex isokinetic dynamometer. The use of normative data for neck strength when evaluating patients with neck disorders needs to take sex into account. The current study has shown that women with chronic neck pain have lower neck muscle strength in extension than the healthy female group.