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PubMed1965

THE ULTRASTRUCTURE OF THE KINOCILIUM OF THE SENSORY CELLS IN THE INNER EAR AND LATERAL LINE ORGANS.

The bundle of sensory hairs protruding from the top of each receptor cell in the vestibular and lateral line organs in the teleost fish (burbot) Lota vulgaris is composed of a number of stereocilia and one kinocilium located in the periphery of the bundle. The ultrastructure of the kinocilium and its basal body is described. It is found that the kinocilium is morphologically polarized by the asymmetric arrangement of its component fibers and of the basal body by the presence of a basal foot. Peripheral fibers 5 and 6 of the kinocilium and the basal foot of the basal body are oriented away from the stereocilia; that is, in a direction coinciding with the direction of excitatory stimulation. The findings are discussed in terms of directional sensitivity.

Animals↗
PubMed1963

INDEPENDENCE OF THE ENDOVESTIBULAR POTENTIAL IN HOMEOTHERMS.

The endolymphatic potential was recorded from various vestibular parts of the labyrinth from which the cochlea (in the case of guinea pigs) or the cochlea, lagena, and sacculus (in the case of pigeons) had been removed. This endovestibular potential of the isolated vestibule declined during anoxia and recovered after anoxia in the same manner as the endovestibular potential of the intact labyrinth. Its non-anoxic level was the same as in the intact labyrinth; i.e., +5 to +8 mv in the pigeon and +2 to +5 mv in the guinea pig. It is, therefore, concluded that the endovestibular potential is independent of the cochlea, stria vascularis, and endocochlear potential.

Animals↗
PubMed1980

Otological manifestations in temporomandibular joint dysfunction.

Forty-seven patients with temporomandibular joint dysfunction were studied. A total of 100 subjective symptoms localized in the ear were encountered in thirty-nine patients. The treatment of dysfunction eradicated or reduced 56% of these symptoms. A hearing defect was established audiometrically in eight cases and the probable cause was outside the masticatory apparatus in seven cases. There was conceviably a causal relationship in one case between the patient's cochlear hearing defect and temporomandibular joint dysfunction. The neuro-otological finding was pathological in nine cases, in three of which the causative agent was independent of the masticatory apparatus. The vestibular disturbance diagnosed in six cases may have originated from temporomandibular joint dysfunction, but this could not be confirmed.

Adolescent↗