Surface Electromyography of Lumbar Paraspinal Muscles During Seated Passive Tilting of Patients With Lateropulsion Following Stroke
By Babyar, Suzanne R., PT, PhD; McCloskey, Karilyn Hildebrand, PT, MS; Reding, Michael, MD ; Neurorehabilitation and Neural Repair, Vol. 21, No. 2, pp. 127-136Publication Date: March/April 2007
Study conducted to compare the onset, response duration, and trends in lumbar paraspinal muscle activity among people who have had a stroke, people who have had a stroke and lateropulsion, and healthy controls during seating with passive tilting and surface electromyography (EMG). A total of 15 people with stroke and lateropulsion, 12 people with uncomplicated stroke, and 16 controls participated in the study. The EMG-544 Amplifier Processor from Therapeutics Unlimited was utilized for surface electromyography. The participants were passively tilted in the frontal plane at slow and fast speeds, while the EMG electrodes recorded paraspinal muscle activity at the third lumbar vertebrae. Surface EMG onset, response duration, and type of muscle activity were compared across the participants via the Burke Lateropulsion Scale. The onset of muscle activity was similar across all groups, as the participants with lateropulsion showed decreased surface EMG response duration in weak-sided paraspinal muscle activity during slow, passive tilting to the strong side. These participants also had more variable muscle activity during fast, passive tilting to the weak side than the control participants.
Published by: Sage Publications (Website:http://www.sagepub.com)
American Society of Neurorehabilitation (Web Site: http://www.asnr.com )
