Quantitative Analysis of a Directed Behavior in the Medicinal Leech: Implications for Organizing Motor Output

This work was supported by National Research Service Award Predoctoral Fellowship MH10677 (J.E.L.), National Institutes of Health Training Grant GM08107 (J.E.L.), and National Institutes of Health Research Grant MH43396 (W.B.K.). We thank R. J. A. Wilson for many helpful discussions.

Correspondence should be addressed to Dr. William B. Kristan Jr, Department of Biology 0357, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0357.

Dr. Lewis’s present address: Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada K1H-8M5.