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The Circuit for Chemotaxis and Exploratory Behavior in C. elegans 

The Circuit for Chemotaxis and Exploratory Behavior in C. elegans
Chapter:
The Circuit for Chemotaxis and Exploratory Behavior in C. elegans
Author(s):

Cornelia I. Bargmann

DOI:
10.1093/med/9780195389883.003.0051
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date: 18 October 2018

The C. elegans nervous system presents an unusual situation in which neuroanatomical connections are extremely well defined, but the understanding of neuronal activity is fragmentary. One C. elegans circuit that is relatively well characterized generates undirected search when animals are removed from food, and directed chemotaxis in odor gradients. Both of these behaviors are based upon temporally regulated turning behavior. The wiring diagram and quantitative behavioral analysis have been used to trace the circuit for local search behavior from sensory input to motor output. Based on cell ablations, some neurons stimulate turning—killing them leads to reduced turning during local search. This chapter focuses on these neurons, including AWC, AIB, AIA, AIY, and ASK neurons.

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