Vibration-induced postural posteffects. Wierzbicka,-M-M; Gilhodes,-J-C; Roll,-J-P J-Neurophysiol. 1998 Jan; 79(1): 143-50.

It generally is known that vibration of various muscles in free-standing subjects evokes a spatially oriented postural response. Furthermore, it recently has been shown that when a vibratory stimulus is terminated, a powerful involuntary contraction of the previously vibrated muscle often occurs that, under the isotonic condition, is accompanied by movement of a limb. The aim of this study was to explore effects of a low-amplitude mechanical vibration, applied in a seated position, on the standing posture. The 30-s vibration was applied bilaterally at the ankle level to anterior or posterior tendons and at the cervical level in front or back of the neck, at one site only at a time. Center of pressure trajectories were monitored during quiet stance for < level. postural the at system motor on after-effect powerful a has vibration, by evoked inflow, sensory Ia sustained that conclude We side. vibration dependent was posture in shift postvibratory induced of orientation Spatial direction. anterior-posterior mainly modification dynamical long-lasting strong, subjects all produced indicate clearly results The trial. control previbration with compared were measurements these and offset after min.
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