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Brain Res. 1982 Jun 10;241(2):334-7.

Activity of an identified serotonergic neuron in free moving Aplysia correlates with behavioral arousal.


Extracellular recordings of the metacerebral cell (MCC), a serotonergic neuron in Aplysia, were obtained in free moving, undrugged animals. MCC activity was evoked by exposure to food. Arousal level was manipulated by satiating the animals or exposing them to a noxious stimulus. We found that the amount of evoked MCC activity correlated with the level of arousal of the animal.

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