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. 2009 Dec 16;103(2):1066–1079. doi: 10.1152/jn.00241.2009

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Fig. 9. — Schematic diagram showing changes in activity in the vestibular nuclei after a unilateral labyrinthectomy (A) and the changes in nuclear activity we hypothesized may occur after prosthesis activation in an animal with bilateral lateral canal plugs (B). Labyrinthectomy eliminates both the tonic and motion-modulated activity in the afferent vestibular nerve; canal plugging does not affect the tonic level of activity but appreciably attenuates the motion-modulated component. Both types of lesions are indicated by an “” through the canal ampullary nerve. I, type I vestibular neurons; II, type II vestibular neurons; OMN, ocular motor neurons; PC, Purkinje cells. Black arrows represent excitatory connections and gray arrows inhibitory connections.

Inline graphic — Schematic diagram showing changes in activity in the vestibular nuclei after a unilateral labyrinthectomy (A) and the changes in nuclear activity we hypothesized may occur after prosthesis activation in an animal with bilateral lateral canal plugs (B). Labyrinthectomy eliminates both the tonic and motion-modulated activity in the afferent vestibular nerve; canal plugging does not affect the tonic level of activity but appreciably attenuates the motion-modulated component. Both types of lesions are indicated by an “” through the canal ampullary nerve. I, type I vestibular neurons; II, type II vestibular neurons; OMN, ocular motor neurons; PC, Purkinje cells. Black arrows represent excitatory connections and gray arrows inhibitory connections.