<P> Nonassociative learning is a change of the behavior of an animal due to an experience from specific kinds of stimuli . In contrast to associative learning the behavioral change is not caused by the animals learning that a particular temporal association occurs between the stimuli . There are three different forms of nonassociative learning examined in Aplysia: habituation, dishabituation and sensitization . Eric Kandel and colleagues were the first to demonstrate that Aplysia californica is capable of displaying both habituation and dishabituation . </P> <P> Habituation in Aplysia californica is when a stimulus is repeatedly presented to an animal and there is a progressive decrease in response to that particular stimulus . </P> <P> Dishabituation in Aplysia californica is when the animal is presented to another novel stimulus and a partial or complete restoration of a habituated response occurs . </P> <P> Sensitization in Aplysia californica is the increase of a response due to the presentation of a novel, often noxious, stimulus . </P>

At what synapse does habituation to gill-withdrawal reflex occur in aplysia