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Intracellular electrophysiological characteristics of visceral nociceptive neurons in cortex SI area of cats

Chen Jinghong, Teng Guoxi

Laboratory of Neurophysiology,Brain Research Institute,China Medical University.Shenyang 110001,Liaoning

Abstract

In the present work we investigated electrophysiological properties of visceral nociceptive neurons in the primary somatosensory cortex (SI). Intracellular recordings of 851 neurons in the representing area of greater splanchnic nerve (GSN) in SI area were made in 22 cats. The neurons showed a variaty of modes in sponteneous discharges, which could be classified into visceral nociceptive neurons (VNNs) and non-visceral nociceptive neurons (NVNNs). VNNs (412) could be further divided into specific and non-specific subtypes, with three distinct response modes: excitatory, inhibitory, and mixed response.

Key words: Somatosensory cortex;Visceral;Nociceptive;Intracellular recording;Labeling;Pain

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Citing This Article：

Chen Jinghong, Teng Guoxi. Intracellular electrophysiological characteristics of visceral nociceptive neurons in cortex SI area of cats. Acta Physiol Sin 1999; 51 (1): 31-37 (in Chinese with English abstract).