A description of the central pattern generator for the crayfish swimmeret system. It is based largely on the work of Brian Mulloney, from the University of California at Davis, adapted for undergraduates. It also links to images and videos showing the anatomy of the abdominal ganglia. The page is part of an online lab manual for an undergraduate neurophysiology course: http://www.science.smith.edu/departments/NeuroSci/courses/bio330/labs.html
. Each exercise has a video demonstrating the procedure, written instructions, and color images showing details.