Environmental Regulation of the Siphon Withdrawal in Juvenile Aplysia Californica: A Developmental Analysis
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The current study wished to determine when environmental regulation of the siphon-withdrawal response (SWR) appears during the juvenile and early adult development of Aplysia californica. SWR occurs when the exhalent siphon closes and is withdrawn beneath the animals parapodia upon being tactiley stimulated (Fischer, Yuan, & Carew, 2000 ; Calin-Jageman & Fischer, 2003). Due to the fact that the origin of identified neuronal cells has been found and some of these cells have been linked to specific behaviors in Aplysia, it is possible to study changes in the nervous system by examining behaviors and their time of onset during development.