Accession Number : AD0631921

Title :   EFFECT OF AUTONOMIC AFFERENT IMPULSES ON BRAINSTEM NEURONS.

Descriptive Note : Final rept.,

Corporate Author : GOETTINGEN UNIV (WEST GERMANY) PHYSIOLOGICAL INST

Personal Author(s) : Kramer,Kurt

Report Date : 19 SEP 1957

Pagination or Media Count : 18

Abstract : To take recordings of action potentials of single units in the nucleus supra opticus the following preparatory studies were carried out. (1) Histological studies of the basal hypothalamic area revealed basal position and disk shaped form of the nucleus, its high vascularisation and dense population of fairly large cells. (2) Several types of microelectrodes were tested. A modification of Hubels tungsten wire, electrolytically sharpened, was found to be the electrode most suitable for the purpose. Insulation of electrode was obtained by quarz evaporation. (3) The subcortical approach to the nucl.sup.opt. made necessary a modification of the classical stereotactic device. (4) Examples of microelectrode recordings in the nucl.sup.opt. are shown. Local discharge patterns show pulsatory rhythms sometimes closely related to heart rate. In other cases rhythms are independent but under vagal control. (Author)

Descriptors :   (*NERVE CELLS, NERVE IMPULSES), (*BRAIN, *NERVE IMPULSES), AUTONOMIC NERVOUS SYSTEM, THALAMUS, HISTOLOGY, ELECTRODES, MINIATURE ELECTRICAL EQUIPMENT, ELECTRICAL INSULATION, QUARTZ, ELECTROENCEPHALOGRAPHY, WEST GERMANY

Subject Categories : Anatomy and Physiology
      Medical Facilities, Equipment and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE