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Raphe neurons and barbiturate induced rhythmic activity in the subthalamic nucleus and ventral tegmental area.

Abstract：

:A continuous rhythmic discharge in the subthalamic nucleus (STN), lateral habenular nucleus, and ventral tegmental area (VTA) is associated with tremor in cats lightly anesthetized with barbiturate. The pontine raphe nuclei centralis superior and inferior also show barbiturate dependent slow wave and unitary activity. Stimulation of the raphe region produces evoked potentials and synchronization of the oscillatory activity in STN and VTA. The latency of the evoked response is shortest in STN. Extensive raphe lesions abolish the rhythmic activity in STN and VTA, but lesions which do not completely destroy nuclei centralis superior and inferior are not effective. In single cell recordings 81% of 142 cells in the pontine raphe region and medial reticular formation are inhibited following VTA stimulation. Fifty-four percent of 129 cells in the same region were inhibited when tested with STN stimulation. Forty-seven raphe paramedian reticular formation cells showed convergence of inhibitory input from STN, VTA, and contralateral sciatic nerve (Group II and III fibers). Depletion of serotonin with rho-chlorophenylalanine did not affect the appearance of barbiturate rhythmic activity. It is concluded that the pontine raphe region is not essential for maintenance of the oscillatory activity in STN and VTA, and that the raphe region is on the output side of the system.

journal_name

Brain Res Bull

journal_title

Brain research bulletin

authors

Sutin J,Tsubokawa T,McBride R

doi

10.1016/0361-9230(76)90053-8

subject

Has Abstract

pub_date

1976-01-01 00:00:00

pages

93-102

issue

1

eissn

0361-9230

issn

1873-2747

pii

0361-9230(76)90053-8

journal_volume

1

pub_type

杂志文章

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