Accession Number:

AD0633362

Title:

FORMAL PROGRESS REPORT, OCTOBER 15, 1965 THROUGH JANUARY 14, 1966.

Descriptive Note:

Corporate Author:

CHICAGO UNIV ILL MEDICAL SCHOOL

Personal Author(s):

Report Date:

1966-01-01

Pagination or Media Count:

4.0

Abstract:

ANATOMY Data on the origin of the efferent system to vestibular sense organs failed to demonstrate an association between destruction of the vestibular nuclei and degeneration of homolateral vesiculated nerve endings on the vestibular sensory hair cells. Study on the ultrastructure of the synopses within the tangential nucleus was completed. ABLATION EXPERIMENTS Study on importance of the medial longitudinal fasciculus in the transmission of vestibular information to eye muscles consisted in observing disturbances of eye movements after lesious localized at various levels of the fasciculus. STIMULATION EXPERIMENTS Changes in postural reflexes during electrical stimulation of the modulus in the cat was demonstrated. Nystagmus in the cat was induced by electrical stimulation of the postero-lateral areas of the hypothalamus that may correspond to the central nystagmogenic area described in the rabbit. ELECTROPHYSIOLOGY Resting activity of 481 single units probably located within the Deiters nucleus of the cat were recorded on tape. The contribution of the peripheral vestibular sense organs to the resting activity recorded in the vestibular nuclei will be investigated by blocking the sense organs.

Subject Categories:

  • Anatomy and Physiology
  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE