Caenorhabditis elegans

https://doi.org/10.1351/goldbook.11658
Nematode with a well defined small neural network and homologues of human neurotransmitters, used as a model organism for studying normal development as well as neurotoxicity.
Note: Neurotoxic endpoints studied in Caenorhabditis elegans include locomotion, reaction to touch and temperature-sensitivity.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 854 [Terms] [Paper]