Spinal Cord Injury and Time to Instability in Seated Posture

Title
Spinal Cord Injury and Time to Instability in Seated Posture
Author(s)
신성훈Jacob J. Sosnoff[Jacob J. Sosnoff]
Keywords
VIRTUAL TIME; PARAPLEGIC SUBJECTS; WHEELCHAIR USERS; PEOPLE; FALLS; INDIVIDUALS; BALANCE; STABILITY; CONTACT
Issue Date
201308
Publisher
W B SAUNDERS CO-ELSEVIER INC
Citation
ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION, v.94, no.8, pp.1615 - 1620
Abstract
Objective: To investigate seated postural control in persons with spinal cord injury (SCI) compared with age-matched controls. Design: Cohort. Setting: University research laboratory. Participants: Adults (N = 36; mean age +/- SD, 22.5 +/- 3.2y): 7 persons with high SCI (HI group; injury level greater than T10), 11 persons with low SCI (LI group; injury level between T10 and L4), and 18 persons with non-SCI. Intervention: Not applicable. Main Outcomes Measures: Participants sat on a force platform on a custom-built wooden box with their arms by their side. Postural control was quantified in several ways. Participants completed a functional reach test. The amount of postural sway was quantified by characterizing the center of pressure (COP) trajectory by determining median velocity and root mean square of the signal. In addition, the virtual time to contact to the functional boundary was quantified. Last, the instability index was determined as the ratio of the COP area to the functional boundary. Results: There were no group differences in COP-based metrics (P>.05). There was no difference between SCI groups in functional reach (P>.05). The HI group had a smaller virtual time to contact (VTC) than the control group (.50 +/-.20s vs .98 +/-.24s, P<.05). Both SCI groups had a greater instability index than the control group, with the HI group having the largest amount of instability (P<.05). Conclusions: The observations suggest that VTC analysis is appropriate to investigate seated postural control. It is proposed that including VTC of seated postural control as an outcome measure will provide novel information concerning the effectiveness of various rehabilitation approaches and/or technologies aimed at improving seated postural control in persons with SCI. (c) 2013 by the American Congress of Rehabilitation Medicine
URI
http://hdl.handle.net/YU.REPOSITORY/29208http://dx.doi.org/10.1016/j.apmr.2013.02.008
ISSN
0003-9993
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생활과학대학 > 체육학부 > Articles
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