Abstract
Vestibular nerves of bull frogs were sectioned unilaterally, and angle of the tilt of the head was measured periodically. The angle returned to O degree in an average of 7.3 weeks. At this stage, the anterior and horizontal semicircular canals and the utricle were removed for observation by SEM. The sensory epithelium showed normal structure, and the sectioned vestibular nerve was well united and regenerated. Discrete action potentials could be elicited from the semicircular canals. These results suggest that postural recovery involved two mechanisms : central compensation and reactivation of the end organ.
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