IN-VIVO RESPONSES OF SINGLE OLFACTORY RECEPTOR NEURONS IN THE CHANNEL CATFISH, ICTALURUS-PUNCTATUS

被引:88
作者
KANG, JS [1 ]
CAPRIO, J [1 ]
机构
[1] LOUISIANA STATE UNIV,DEPT ZOOL & PHYSIOL,BATON ROUGE,LA 70803
关键词
D O I
10.1152/jn.1995.73.1.172
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
1. We report for the first time in any teleost, a quantitative in vivo study of recordings from single olfactory receptor neurons (ORNs) in the channel catfish. Ictalurus punctatus, with odorant stimuli. 2. Responses of 69 spontaneously active single ORNs were recorded simultaneously with the electroolfactogram (EOG). Recording times ranged from 10 to 72 min per receptor cell with an average of 24 +/- 15 (SD) min/cell. The averaged spontaneous frequency ranged from <1 to 12 action potentials/s with a mean frequency of 4.7 +/- 2.5 action potentials/s. 3. Catfish ORNs responded to the odorant stimuli (amino acids, bile salts, and ATP) with either an excitation or suppression of the background neural activity. Suppressive responses were encountered more frequently than excitatory responses, suggesting that suppressive responses also play an important role in olfactory coding. 4. Excitatory and suppressive responses to the different odorants were elicited from the same ORN, suggesting that different olfactory receptor molecules and different transduction pathways exist in the same ORN.
引用
收藏
页码:172 / 177
页数:6
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