Projection neurons in Drosophila antennal lobes signal the acceleration of odor concentrations

被引:34
|
作者
Kim, Anmo J. [1 ]
Lazar, Aurel A. [1 ]
Slutskiy, Yevgeniy B. [1 ]
机构
[1] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA
来源
ELIFE | 2015年 / 4卷
基金
美国国家卫生研究院;
关键词
SYSTEM-IDENTIFICATION; SENSORY NEURONS; DYNAMICS; MECHANISMS; BEHAVIOR; MELANOGASTER; CHEMOTAXIS; RESPONSES; TRACKING; CIRCUIT;
D O I
10.7554/eLife.06651
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Temporal experience of odor gradients is important in spatial orientation of animals. The fruit fly Drosophila melanogaster exhibits robust odor-guided behaviors in an odor gradient field. In order to investigate how early olfactory circuits process temporal variation of olfactory stimuli, we subjected flies to precisely defined odor concentration waveforms and examined spike patterns of olfactory sensory neurons (OSNs) and projection neurons (PNs). We found a significant temporal transformation between OSN and PN spike patterns, manifested by the PN output strongly signaling the OSN spike rate and its rate of change. A simple two-dimensional model admitting the OSN spike rate and its rate of change as inputs closely predicted the PN output. When cascaded with the rate-of-change encoding by OSNs, PNs primarily signal the acceleration and the rate of change of dynamic odor stimuli to higher brain centers, thereby enabling animals to reliably respond to the onsets of odor concentrations.
引用
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页数:11
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