Complex functional attributes of amygdaloid gustatory neurons in the rhesus monkey

Z. Karádi, T. R. Scott, Y. Oomura, H. Nishino, S. Aou, L. Lénárd

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

To reveal specific functions of glucose-sensitive (GS) and glucose-insensitive (GIS) cells in chemical information processing, single neuron activity was recorded in the amygdaloid body (AMY) of macaques during: 1) gustatory stimulations and 2) microelectrophoretic administration of chemicals. Of the 629 neurons tested, 56 (8.9%) responded to, usually two or more, taste qualities. Hedonically distinct tastants usually elicited opposite firing rate changes of the gustatory cells. Seventy percent of the gustatory responses were recorded from GS neurons (17% of all AMY cells). Catecholamines (CAs) induced discharge rate changes in a majority of taste-responsive neurons: The GS gustatory cells were suppressed by norepinephrine (in the form of noradrenaline HCl, NA), whereas the GIS taste-responsive neurons were facilitated by dopamine (DA). Furthermore, NA- and/or DA-antagonists were able to attenuate or suppress taste-elicited responses of several of these cells. These and previous data indicate a specific functional organization of AMY gustatory cells: The GS and GIS taste neurons appear to be involved in differential integration of feeding-associated humoral-metabolic, motivational and exogenous chemical information.

Original languageEnglish
Pages (from-to)488-492
Number of pages5
JournalAnnals of the New York Academy of Sciences
Volume855
DOIs
Publication statusPublished - Jan 1 1998

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • History and Philosophy of Science

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