Neuronal activity of identified posterior hypothalamic neurons projecting to the brainstem peribrachial area of the cat |
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Authors: | D Paré Y Smith A Parent M Steriade |
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Affiliation: | Laboratoire de Neurophysiologie, Faculté de Médecine, Université Laval, Quebec, Canada. |
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Abstract: | Following horseradish peroxidase injections in the brainstem peribrachial (PB) area, massive retrograde labeling was found in the posterior hypothalamic region. Single-unit recordings posterior hypothalamic neurons with antidromically identified projections to the PB area revealed that these neurons have higher firing rates in waking than in slow-wave sleep and dissimilar discharge patterns as compared with intralaminar thalamic neurons. The results are discussed in the context of reciprocal hypothalamo-brainstem circuits. |
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