[Influence of proprioceptive input from leg, thigh, trunk and neck muscles on the equilibrium of standing].
To investigate and compare the roles of proprioceptive input from the leg, thigh, trunk and neck muscles on equilibrium, we performed static posturography in 50 normal subjects in the standing position on a force platform by applying vibratory stimulations to the muscles. The length of the displacement of the center of gravity, maximum sway length and sway area were measured. The amplitude of the body sway was maximum when the stimulation was applied to the dorsal neck. The forward shift of the center of gravity was also marked by stimulation applied to the dorsal neck. The amplitude of the body sway on stimulation of the leg muscles was also marked, although less than that of dorsal neck stimulation. The backward shift during stimulation of the gastrocnemius and the forward shift during stimulation of the anterior tibialis were remarkable. The results indicate that the leg muscles, which directly regulate the movement of the ankle joint, and the dorsal neck muscles, which change the static equilibrium through the central nervous system, are important for maintaining the standing posture.
Sakuma
A
A
Kamio Memorial Hospital, Tokyo.
Aihara
Y
Y
D000328:Adult; D005260:Female; D006801:Humans; D007866:Leg / Q000502:physiology; D008297:Male; D018482:Muscle, Skeletal / Q000502:physiology; D009334:Neck Muscles / Q000502:physiology; D004856:Postural Balance / Q000502:physiology*; D011187:Posture; D011434:Proprioception / Q000502:physiology*; D014732:Vibration