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Updated: May 25, 2026

Intracellular Recording, Sensory Field Mapping, and Culturing Identified Neurons in the Leech, Hirudo medicinalis
Published on: November 4, 2013
Neural circuits controlling behavior and autonomic functions in medicinal leeches
Damon G Lamb1, Ronald L Calabrese
1Department of Biology, Emory University, 1510 Clifton Road, Atlanta, GA 30322, USA. ronald.calabrese@emory.edu.
Abstract:
In the study of the neural circuits underlying behavior and autonomic functions, the stereotyped and accessible nervous system of medicinal leeches, Hirudo sp., has been particularly informative. These leeches express well-defined behaviors and autonomic movements which are amenable to investigation at the circuit and neuronal levels. In this review, we discuss some of the best understood of these movements and the circuits which underlie them, focusing on swimming, crawling and heartbeat. We also discuss the rudiments of decision-making: the selection between generally mutually exclusive behaviors at the neuronal level.
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