EFFECT OF AUTONOMIC AFFERENT IMPULSES ON BRAINSTEM NEURONS.
GOETTINGEN UNIV (WEST GERMANY) PHYSIOLOGICAL INST
Pagination or Media Count:
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
- Anatomy and Physiology
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