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@article{ART001671086},
author={Su-Hyun Park and Jung, Min-Ye and Yoo, Eun-Young and Park Soo Hyun and Jin Lee and SANG BAEK KOH and Jung Suk Roh},
title={Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury},
journal={Korean Journal of Occupational Therapy},
issn={1226-0134},
year={2012},
volume={20},
number={2},
pages={137-149},
doi={}

TY - JOUR
AU - Su-Hyun Park
AU - Jung, Min-Ye
AU - Yoo, Eun-Young
AU - Park Soo Hyun
AU - Jin Lee
AU - SANG BAEK KOH
AU - Jung Suk Roh
TI - Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury
JO - Korean Journal of Occupational Therapy
PY - 2012
VL - 20
IS - 2
PB - Korean Society Of Occupational Therapy
SP - 137
EP - 149
SN - 1226-0134
AB - Objective : This study intended to provide research materials for the proper positioning of the keyboard for computer work by individuals with a thoracic SCI based on the experimental data on the EMG activity of eight muscles related to computer work. Methods : The subjects used were 9 and 11 patients with a complete high (T2-T8) or low (T9-T12) thoracic SCI (T2-T8) of A or B as categorized by the American Spinal Injury Association (ASIA), respectively, along with 9 able-bodied individuals. All participants were given the task of typing on the middle line of the keyboard at a speed of 4 characters per second at a rhythm from a metronome for 2 minutes at 2 keyboard heights (elbow flexion of more than 100°, elbow flexion of 70°) During the experiment, the EMG activity (%RVC) of the muscles of the neck and shoulder, such as the cervical erector spinae, upper trapezius, anterior deltoid, posterior deltoid, and middle trapezius, the wrist extension muscle group and the minor muscles maintaining the body core of the individuals with an SCI, such as the latissimus dorsi and pectoralis major, were measured using a surface EMG. Results : The EMG activity of the patients with high and low thoracic SCI was low for the keyboard positioning at an elbow flexion of 70°, which is similar for the anterior deltoid, latissimus dorsi, and wrist extensor muscle group of the able-bodied individuals. Also, for the low thoracic SCI patients, the positions where the elbow flexion angle increased to more than 100°showed high EMG activities of the cervical erector spinae and latissimus dorsi, which was different from the other groups. Conclusion : It was identified that an elbow flexion of 70°is an appropriate work posture for individuals with an SCI. It is thought that further study with a longer research time span and more test subjects should be conducted to explore an appropriate VDT environment for individuals with an SCI under comprehensive computer work conditions.
KW - Computer;Electromyography;Ergonomics;Spinal cord injury;Surface keyboard
DO -
ER -

Su-Hyun Park, Jung, Min-Ye, Yoo, Eun-Young, Park Soo Hyun, Jin Lee, SANG BAEK KOH and Jung Suk Roh. (2012). Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury. Korean Journal of Occupational Therapy, 20(2), 137-149.

Su-Hyun Park, Jung, Min-Ye, Yoo, Eun-Young, Park Soo Hyun, Jin Lee, SANG BAEK KOH and Jung Suk Roh. 2012, "Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury", Korean Journal of Occupational Therapy, vol.20, no.2 pp.137-149. Available from: doi:

Su-Hyun Park, Jung, Min-Ye, Yoo, Eun-Young, Park Soo Hyun, Jin Lee, SANG BAEK KOH, Jung Suk Roh "Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury" Korean Journal of Occupational Therapy 20.2 pp.137-149 (2012) : 137.

Su-Hyun Park, Jung, Min-Ye, Yoo, Eun-Young, Park Soo Hyun, Jin Lee, SANG BAEK KOH, Jung Suk Roh. Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury. 2012; 20(2), 137-149. Available from: doi:

Su-Hyun Park, Jung, Min-Ye, Yoo, Eun-Young, Park Soo Hyun, Jin Lee, SANG BAEK KOH and Jung Suk Roh. "Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury" Korean Journal of Occupational Therapy 20, no.2 (2012) : 137-149.doi:

Su-Hyun Park; Jung, Min-Ye; Yoo, Eun-Young; Park Soo Hyun; Jin Lee; SANG BAEK KOH; Jung Suk Roh. Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury. Korean Journal of Occupational Therapy, 20(2), 137-149. doi:

Su-Hyun Park; Jung, Min-Ye; Yoo, Eun-Young; Park Soo Hyun; Jin Lee; SANG BAEK KOH; Jung Suk Roh. Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury. Korean Journal of Occupational Therapy. 2012; 20(2) 137-149. doi:

Su-Hyun Park, Jung, Min-Ye, Yoo, Eun-Young, Park Soo Hyun, Jin Lee, SANG BAEK KOH, Jung Suk Roh. Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury. 2012; 20(2), 137-149. Available from: doi:

Su-Hyun Park, Jung, Min-Ye, Yoo, Eun-Young, Park Soo Hyun, Jin Lee, SANG BAEK KOH and Jung Suk Roh. "Change in EMG Activities of Selected Muscles Based on the Position of the Keyboard During Computer Work for Individuals With a Spinal Cord Injury" Korean Journal of Occupational Therapy 20, no.2 (2012) : 137-149.doi: