Muscle activation timing and balance response in chronic lower back pain patients with associated radiculopathy |
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| Affiliation: | 4. Department of Medical Rehabilitation, Faculty of Health Sciences and Technology, College of Medicine, University of Nigeria Enugu Campus, Enugu, Nigeria;1. Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China;2. State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China;1. Division of Neurological Pain Research and Therapy, Department of Neurology, University Hospital Schleswig-Holstein, Campus Kiel, Arnold-Heller-Straße 3, 24105 Kiel, Germany;2. Department of Neurosurgery, University Hospital Schleswig-Holstein, Campus Kiel, Arnold-Heller-Straße 3, 24105 Kiel, Germany;1. Pars Hospital, Pamim Research Center, Tehran, Iran;2. Department of Neurosurgery, Diabetes Research Center, Emam Hospital, Mazandaran University of Medical Science, Sari, Iran;1. Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705, USA;2. Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA;3. Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53705, USA;4. Department of Surgery, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA;1. Division of Clinical Laboratory, Gifu University Hospital, Gifu, Japan;2. Department of Orthopaedic Surgery, Gifu University Graduate School of Medicine, Gifu, Japan;3. Department of Regeneration and Advanced Medical Sciences, Gifu University Graduate School of Medicine, Gifu, Japan;4. Department of Sports Medicine and Sports Science, Gifu University Graduate School of Medicine, Gifu, Japan |
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| Abstract: | BackgroundPatients with chronic low back pain and associated radiculopathy present with neuromuscular symptoms both in their lower back and down their leg; however, investigations of muscle activation have so far been isolated to the lower back. During balance perturbations, it is necessary that lower limb muscles activate with proper timing and sequencing along with the lower back musculature to efficiently regain balance control.MethodsPatients with chronic low back pain and radiculopathy and matched controls completed a series of balance perturbations (rapid bilateral arm raise, unanticipated and anticipated sudden loading, and rapid rise to toe). Muscle activation timing and sequencing as well as kinetic response to the perturbations were analyzed.FindingsPatients had significantly delayed lower limb muscle activation in rapid arm raise trials as compared to controls. In sudden loading trials, muscle activation timing was not delayed in patients; however, some differences in posterior chain muscle activation sequencing were present. Patients demonstrated less anterior–posterior movement in unanticipated sudden loading trials, and greater medial–lateral movement in rise to toe trials.InterpretationPatients with low back pain and radiculopathy demonstrated some significant differences from control participants in terms of muscle activation timing, sequencing, and overall balance control. The presence of differences between patients and controls, specifically in the lower limb, indicates that radiculopathy may play a role in altering balance control in these patients. |
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