Efferent‐mediated Binaural Interactions between the Vestibular End‐Organs in the Chinchilla

In nonmammalian species, the efferent vestibular system (EVS) conveys vestibular input to contralateral vestibular end-organs.1,2 Recently we reported that a vestibular input to the EVS results in symmetric, excitatory (type III) rotational responses in afferents.3 Canal-plugging experiments imply that the responses reflect the bilateral efferent innervation of each labyrinth.4 To study the role of the contralateral labyrinth, we have stimulated it with galvanic currents.