Long-term retention of habituation in the sea anemone (Anthopleura elegantissima)

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Long-term retention of habituation was assessed over a 4-day period in the contraction response of intertidal sea anemones. Substantially less responding was evident as much as 72 hrs after initial training either with or without interpolated training on Day 2. Retained response decrements were indicated both by an absence of spontaneous recovery and by the potentiation of habituation. Although slight differences in habituation rates were evident between the 2 components of contradiction (closure and reexpansion), no differences appeared in the amount of long-term retention observed in each. Results are discussed with respect to the possible nature of retention processes occurring in the coelenterate nerve net. It is concluded that the generalized association of persistence with increased complexity is invalid. (20 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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