Activity of identified cerebral neuron correlates with food-induced arousal in Aplysia.
Firing of the cerebral-pedal regulator neuron, C-PR, evokes a constellation of responses which are characteristic of the food-induced arousal state that occurs following exposure of Aplysia to seaweed. To provide further evidence that C-PR plays a role in generating the food-induced arousal state, extracellular recordings from the cerebral-pedal connective, which contains the axon of C-PR, were obtained in freely moving animals. The C-PR spike in the connective recorded in vivo was then identified by comparing the wave form to the obtained by firing C-PR in an in vitro preparation. We report here that C-PR activity is evoked by food stimulation, and increased firing of the C-PR is closely correlated with appetitive head lifting, the first manifestation of the food arousal state.
Teyke
T
T
Center for Neurobiology and Behavior, College of Physicians and Surgeons, Columbia University, New York, NY 10032.
Weiss
K R
KR
Kupfermann
I
I
D000818:Animals; D001048:Aplysia; D001143:Arousal / Q000502:physiology*; D001369:Axons / Q000502:physiology; D004435:Eating / Q000502:physiology*; D004594:Electrophysiology / Q000379:methods; D005247:Feeding Behavior; D008124:Locomotion; D009043:Motor Activity; D009424:Nervous System Physiological Phenomena; D009474:Neurons / Q000502:physiology*