Effects of vision on head stability and torques during voluntary pulls made by standing humans.
Neurosci Lett
; 282(1-2): 9-12, 2000 Mar 17.
Article
en En
| MEDLINE
| ID: mdl-10713384
ABSTRACT
This study tested the hypothesis that vision would improve pitch-plane stabilization of the head by increasing how well neck muscle torque compensates for torques associated with body motion, in a task where standing human subjects made rapid voluntary pulls. Ten subjects performed abrupt horizontal pulls on a handle to two peak force targets, with the eyes open and closed. We evaluated head angular velocity with respect to space. Inverse dynamics were used to subdivide the torque acting on the head into gravito-interactive and muscle components. A torque compensation ratio was computed from those two components. Head angular velocity was lower and the compensation ratio was higher during pulls made with the eyes open, for both force targets. The data suggest that vision enhances head stability by increasing the effectiveness with which muscle torques oppose gravito-interactive torques during voluntary pulls made while standing.
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Bases de datos:
MEDLINE
Asunto principal:
Percepción Visual
/
Torque
/
Movimientos de la Cabeza
Límite:
Adult
/
Humans
Idioma:
En
Revista:
Neurosci Lett
Año:
2000
Tipo del documento:
Article
País de afiliación:
Estados Unidos