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- Title
Influence of gravity compensation on kinematics and muscle activation patterns during reach and retrieval in subjects with cervical spinal cord injury: An explorative study.
- Authors
Kloosterman, Marieke G. M.; Snoek, Govert J.; Kouwenhoven, Mirjam; Nene, Anand V.; Jannink, Michiel J. A.
- Abstract
Many interventions in upper-limb rehabilitation after cervical spinal cord injury (CSCI) use arm support (gravity compensation); however, its specific effects on kinematics and muscle activation characteristics in subjects with a CSCI are largely unknown. We conducted a cross-sectional explorative study to study these effects. Nine subjects with a CSCI performed two goal-directed arm movements (maximal reach, reach and retrieval) with and without gravity compensation. Angles at elbow and shoulder joints and muscle activation were measured and compared. Seven subjects reduced elbow extension (range 1.8°-4.5°) during the maximal reaching task with gravity compensation. In the reach and retrieval task with gravity compensation, all subjects decreased elbow extension (range 0.1°-11.0°). Eight subjects executed movement closer to the body. Regarding muscle activation, gravity compensation did not influence timing; however, the amplitude of activation decreased, especially in antigravity muscles, namely mean change +/- standard deviation of descending part of trapezius (18.2% +/- 37.5%), anterior part of deltoid (37.7% +/- 16.7%), posterior part of deltoid (32.0% +/- 13.9%), and long head biceps (49.6% +/- 20.0%). Clinical implications for the use of gravity compensation in rehabilitation (during activities of daily living or exercise therapy) should be further investigated with a larger population.
- Subjects
NETHERLANDS; DELTOID muscle physiology; BICEPS brachii; TRAPEZIUS muscle physiology; ANALYSIS of variance; ARM; COMPARATIVE studies; ELECTROMYOGRAPHY; KINEMATICS; MEDICAL rehabilitation; PATIENTS; REHABILITATION centers; RESEARCH; RESEARCH funding; SPINAL cord injuries; STATISTICS; STRIATED muscle; TORQUE; DATA analysis; BODY movement; CROSS-sectional method; MOTION capture (Human mechanics); PHYSIOLOGY
- Publication
Journal of Rehabilitation Research & Development, 2010, Vol 47, Issue 7, p617
- ISSN
0748-7711
- Publication type
Article
- DOI
10.1682/JRRD.2010.02.0014