Journal article

MONOSYNAPTIC EXCITATION OF PREGANGLIONIC VASOMOTOR NEURONS BY SUBRETROFACIAL NEURONS OF THE ROSTRAL VENTROLATERAL MEDULLA

RM MCALLEN, HJ HABLER, M MICHAELIS, O PETERS, W JANIG

BRAIN RESEARCH | ELSEVIER SCIENCE BV | Published : 1994

Abstract

Extracellular single unit recordings were made from barosensitive neurons in the subretrofacial nucleus (SRF) of the rostral ventrolateral medulla in chloralose-anaesthetised cats. At the same time, single preganglionic neuron activity was recorded from filaments of the cervical sympathetic trunk (CST); barosensitive units were selected for study. Evidence for monosynaptic connections between the two neuron groups was sought by cross-correlation analysis of their ongoing activity. Cross-correlograms of 16/16 SRF/CST neuron pairs showed a broad peak (100-200ms wide), reflecting the synchronizing action of arterial baroreceptors on both neurons' activity. Two of the 16 cross-correlograms addit..

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