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Characterization of the neurons in the region of solitary tract nucleus during sleep



Characterization of the neurons in the region of solitary tract nucleus during sleep



Physiology & Behavior 24(1): 99-102



Single-unit recording was made from neurons in the region of solitary tract nucleus (NTS) of cats. Neurons discharging in correlation with cardiac or respiratory cycle were identified outside the NTS. They showed no obvious change in discharge rate during sleep-wakefulness cycle, and were unresponsive to electrical stimulation of the mesencephalic reticular formation (MRF), suggesting that they are not involved in slow wave sleep (SS) mechanism. More than half of the neurons recorded in the NTS showed an increase in discharge rate during, but not prior to, SS. Most non-NTS neurons had, during SS, a discharge rate similar to that during wakefulness. The NTS neurons may be more related to SS mechanism than non-NTS neurons. The effectiveness of electrical stimulation of the MRF in driving or inhibiting the neurons of the NTS region was expressed by an index. Responses with greater S/W [sleep/wakefulness] index ratio were excitatory, while those with smaller were inhibitory. During paradoxical sleep the effectiveness was usually reduced.

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Accession: 004933438

Download citation: RISBibTeXText

PMID: 7384255

DOI: 10.1016/0031-9384(80)90020-7



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