Abstract
(1) The cortical projection of the vestibular nuclei (LVN, MVN and IVN) was investigated by the evoked potential and unit discharge analyses in the cat anesthetized with alpha-chloralose and/or immobilized with gallamine triethiodide. (2) This projection field coincided well with that of the vestibular nerves, being principally contralateral by LVN stimulation but nearly symmetrical by either MVN or [VN stimulation. (3) Of 11 units responsive to vestibuiar nuclei stimulation, 6 reacted to stimulation of the visual association cortex (anterior part of the Clare-Bishop area). The response pattern of the cortical vestibular units by C-B stimulation was a sequence of excitation, inhibition and rebound. (4) Interaction of visual information with the cortical vestibular neurons was discussed.