TY - JOUR

T1 - 視覺與表皮感覺對穩定站立姿勢的影響

AU - Li), 李詩瑋(Shih-Wei

AU - Lin), 林桑伊(Sang-I

AU - Hsu), 許立儒(Li-Ju

AU - Liao), 廖健芬(Chien-Fen

PY - 2008

Y1 - 2008

N2 - Background and Purposes: Different types of sensory inputs can be used simultaneously to regulate postural stability. However, how different inputs that convey similar information for postural control, such as visual and cutaneous, would affect each other is unknown. This study sought to determine how visual inputs and cutaneous inputs from fingertip contact would affect postural stability. Methods: Twenty healthy young adults participated in the study and stood with the feet together on a force platform with eyes open in lighted room (normal, NORM), in darkness (deprived, DPRV), and in darkness with a light fixated onto the head (fixed, FIXD), first without and then with fingertip contact (FC). The variables of interest were center of pressure in the anterior-posterior (AP) and medial-lateral (ML) directions. Results: Vision and FC each was found to have significant main effect, but not interaction. Significantly smaller postural sway was found in FC than without FC. NORM and FIXD had significantly smaller sway trajectory, velocity, and range in the ML but not the AP direction, than DRPV. Conclusions: These findings confirmed the effect of FC in stabilizing standing posture, and demonstrated that this effect was not affected by visual inputs. The effect of visual inputs however, was direction specific, having a greater effect on the direction that was more challenged, i.e. ML in feet together standing. What is more, fixed visual inputs, although inaccurate in reflecting postural sway, helped to improve postural stability, suggesting that the role of visual inputs may not necessarily be confined to providing information regarding the relationships between the body and the environment.

AB - Background and Purposes: Different types of sensory inputs can be used simultaneously to regulate postural stability. However, how different inputs that convey similar information for postural control, such as visual and cutaneous, would affect each other is unknown. This study sought to determine how visual inputs and cutaneous inputs from fingertip contact would affect postural stability. Methods: Twenty healthy young adults participated in the study and stood with the feet together on a force platform with eyes open in lighted room (normal, NORM), in darkness (deprived, DPRV), and in darkness with a light fixated onto the head (fixed, FIXD), first without and then with fingertip contact (FC). The variables of interest were center of pressure in the anterior-posterior (AP) and medial-lateral (ML) directions. Results: Vision and FC each was found to have significant main effect, but not interaction. Significantly smaller postural sway was found in FC than without FC. NORM and FIXD had significantly smaller sway trajectory, velocity, and range in the ML but not the AP direction, than DRPV. Conclusions: These findings confirmed the effect of FC in stabilizing standing posture, and demonstrated that this effect was not affected by visual inputs. The effect of visual inputs however, was direction specific, having a greater effect on the direction that was more challenged, i.e. ML in feet together standing. What is more, fixed visual inputs, although inaccurate in reflecting postural sway, helped to improve postural stability, suggesting that the role of visual inputs may not necessarily be confined to providing information regarding the relationships between the body and the environment.

UR - http://www.airitilibrary.com/Publication/Index/15632555-200804-33-2-94-101-a

M3 - Tidsskriftartikel

JO - 物理治療

JF - 物理治療

ER -