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Movement Coordination During Humeral Elevation in Individuals With Newly Acquired Spinal Cord Injury
Journal article   Peer reviewed

Movement Coordination During Humeral Elevation in Individuals With Newly Acquired Spinal Cord Injury

Margaret A. Finley, Elizabeth Euiler, Shivayogi Hiremath and Joseph Sarver
Journal of applied biomechanics, v 36(5), pp 345-350
01 Oct 2020
PMID: 32796138

Abstract

Engineering Engineering, Biomedical Life Sciences & Biomedicine Science & Technology Sport Sciences Technology
Humeral elevation is a critical motion for individuals who use a manual wheelchair given that, in a typical day, wheelchair users reach overhead 5 times more often than able-bodied controls. Kinematic analyses in individuals with chronic spinal cord injury (SCI) have focused on weight-bearing tasks rather than overhead reaching. This technical report presents shoulder movement coordination during overhead reaching in individuals with newly acquired SCI. Eight volunteers with acute SCI and 8 matched, uninjured controls participated. Three-dimensional kinematics were collected during seated, humeral elevation. Scapular and thoracic rotations during humeral elevation were averaged across repetitions. The linear relationship of scapular upward rotation to humeral elevation provided movement coordination analysis. Maximal elevation was reduced in SCI with increased thoracic kyphosis. Medium to large effect sizes were found at each elevation angle, with reduced scapular external rotation, posterior tilt, and increased thoracic kyphosis for those with SCI. The linear relationship occurred later and within a significantly (P =.02) smaller range of humeral elevation in SCI. Altered movement coordination, including a diminished linear association of scapular upward rotation and humeral elevation (scapulohumeral rhythm), is found with reduced maximal elevation and increased thoracic kyphosis during overhead reaching tasks in those with acute SCI.

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Collaboration types
Domestic collaboration
Web of Science research areas
Engineering, Biomedical
Sport Sciences
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