Abstract| Volume 177, ISSUE 1, P35-36, August 2013

Physiological activation of the vestibular utricle evokes sympathetic modulation to both muscle and skin

      Purpose: Over the past decade, employing sinusoidal galvanic vestibular stimulation (GVS) we demonstrated potent modulation of muscle sympathetic nerve activity (MSNA) and skin sympathetic nerve activity (SSNA). However, GVS affects the discharge of afferents from the entire vestibular apparatus. Here we seek to differentiate between the vestibular organs, by employing specific physiological stimuli. We tested the hypothesis that linear acceleration in the horizontal plane, which targets the utricle exclusively, will evoke vestibulosympathetic reflexes to skin but not to muscle.
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