COHERENT NETWORK OSCILLATIONS BY OLFACTORY INTERNEURONS - MODULATION BY ENDOGENOUS AMINES

被引:64
作者
GELPERIN, A [1 ]
RHINES, LD [1 ]
FLORES, J [1 ]
TANK, DW [1 ]
机构
[1] AT&T BELL LABS, BIOL COMPUTAT RES DEPT, RM 1C464, 600 MT AVE, MURRAY HILL, NJ 07974 USA
关键词
D O I
10.1152/jn.1993.69.6.1930
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
1. The procerebral (PC) lobe of the terrestrial mollusk Limax maximus contains a highly interconnected network of local olfactory interneurons that receives direct axonal projections from the two pairs of noses. This olfactory processing network generates a 0.7-Hz oscillation in its local field potential (LFP) that is coherent throughout the network. The oscillating LFP is modulated by natural odorants applied to the neuroepithelium of the superior nose. 2. Two amines known to be present in the PC lobe, dopamine and serotonin, increase the frequency of the PC lobe oscillation and alter its waveform. 3. Glutamate, another putative neurotransmitter known to be present in the lobe, suppresses the PC lobe oscillation by a quisqualate-type receptor and appears to be used by one of the two classes of neurons in the PC lobe to generate the basic LFP oscillation. 4. The known activation of second messengers in Limax PC lobe by dopamine and serotonin together with their effects on the oscillatory rhythm suggest the hypothesis that these amines augment mechanisms mediating synaptic plasticity in the olfactory network, similar to hypothesized effects of amines in vertebrate olfactory systems. 5. The use of a distributed network of interneurons showing coherent oscillations may relate to the highly developed odor recognition and odor learning ability of Limax.
引用
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页码:1930 / 1939
页数:10
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