(full paper is archived in the Miller Library)
Title: The shrug response in Melibe leonina: behavioral and neurophysiological observations
Student Author(s): Scott, Diane Lynn
Faculty Advisor(s): Thompson, Stuart
Location: Final Papers Biology 175H
Date: June 1990
Abstract: Some of the behaviors of the marine nudibranch Melibe leonina have been described, such as feeding, "galloping", the crumple response, and its fascinating swimming behavior (Hurst, 1968; Thompson). However, a new behavior, the shrug response, has been noticed and is described here. It was noted via visual observations that this behavior habituated quickly and was inhibited during swimming and locomotion. The purpose of this study was to observe and describe the properties of this behavior, trace it neuroanatomically, and find its relation to other motor behaviors. Results of behavioral manipulations and electrophysiological recordings showed that the shrug response is part of a behavioral hierarchy and, because it is mediated through one, central pathwas, would be good for studies on habituation.