title: Postural responses evoked by sinusoidal galvanic stimulation of the labyrinth. Influence of head position.
abstract: In 15 healthy subjects we studied body sway reactions to sinusoidal 0.3 Hz binaural bipolar galvanic current up to 2 mA under three conditions. With the head forward and eyes closed, there is only a periodic lateral displacement of the centre of gravity, following the stimulation with a phase lag. In two other conditions, the head turned to the left or to the right without trunk torsion, the direction of sway was modified in such a way that there were mainly anteroposterior movements. It is thought that this experiment shows the modulatory influence of neck afferents on the direction of vestibulospinal motor effects in man.
mesh_terms: D000328:Adult; D007758:Ear, Inner / Q000502:physiology*; D004558:Electric Stimulation; D004576:Electromyography; D005133:Eye Movements; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000294:innervation*; D009334:Neck Muscles / Q000294:innervation*; D004856:Postural Balance; D011187:Posture; D014722:Vestibule, Labyrinth / Q000502:physiology