This study demonstrates the morphological development of the vestibular sensory cells in the mouse using SEM and TEM.
Vestibular organs from the 11. 5th gestational day to the 2 weeks postnatal day of CBA/CBA mouse were observed.
Sensory hairs were first noticed as stereocilia only, then, the kinocilim was recognized. At last, the step-like appearance of stereocilia was formed. Afferent nerve endings developed earlier than efferent nerve endings. Nerve chalice was recognized on the 20.5th gestational day. The development of vestibular sensory cell was completed until the 7th postnatal day.