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The multifidus muscle plays a role in controlling lumbosacral position and postural sway. One of its attachment sites is the exact site of spina bifida occulta (SBO).
To investigate the role of the muscle for postural control in SBO.
Eighty subjects with SBO (38 in minor; 42 in major) and controls.
Subjects stood upright on a platform at 0° and on an inclined surface (10° and 20°) with feet in plantarflexion/dorsiflexion, together with eyes open and closed. The platform system measured posture to obtain sway area and sway mean for statistics.
Upon sway area/mean, the group differences of major/minor SBO vs. control were all significant. Sway means of minor SBO were lower than those of major SBO at corresponding inclined degrees.
Subjects with SBO demonstrated increased sway as compared to controls.
Shin-Tsu Chang, Ming-Fu Hsieh, Liang-Cheng Chen, Heng-Yi Chu, Cheng-Chiang Chang, and Kao- Chung Tsai are with the Department of Physical Medicine and Rehabilitation, Tri-Service General Hospital, School of Medicine and Chih-Hung Ku is with the School of Public Health, all at the National Defense Medical Center, Taipei 114, Taiwan.