Jk. Gronley et al., Electromyographic and kinematic analysis of the shoulder during four activities of daily living in men with C6 tetraplegia, J REHAB RES, 37(4), 2000, pp. 423-432
Citations number
27
Categorie Soggetti
Rehabilitation,"Ortopedics, Rehabilitation & Sport Medicine
Journal title
JOURNAL OF REHABILITATION RESEARCH AND DEVELOPMENT
The pattern of motor paralysis that commonly follows C6 tetraplegia creates
an increased demand on upper limb function. The present investigation docu
mented shoulder motion and muscular activity during planar motions and four
activities of daily living (ADLs) in 15 men with spinal cord injuries (SCI
) resulting in C6 tetraplegia. Three-dimensional (3-D) shoulder motion was
recorded using a VICON motion system, and intramuscular electrodes recorded
electromyographic (EMG) activity of 12 shoulder muscles. Active flexion an
d abduction required greater EMG than control subjects lifting a 2-kg weigh
t. Relative EMG was similar for most muscles during hair combing, drinking,
and reaching forward, although increased humeral elevation commonly result
ed in a greater relative muscular effort. Hair combing had the most humeral
elevation (90 degrees) with moderate to high levels of activation (32% to
63% maximum) recorded in the anterior deltoid, supraspinatus, infraspinatus
, and scapular muscles. During reaching for the perineum, posterior deltoid
and subscapularis activity dominated.