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Nonassociative learning in the leech Hirudo medicinalis.
Zaccardi, M L; Traina, G; Cataldo, E; Brunelli, M.
Afiliação
  • Zaccardi ML; Dipartimento di Fisiologia e Biochimica G. Moruzzi, Università degli Studi di Pisa, Via S. Zeno, 31, 56127 Pisa, Italy.
Behav Brain Res ; 126(1-2): 81-92, 2001 Nov 29.
Article em En | MEDLINE | ID: mdl-11704254
In the present study we examined nonassociative learning of the induction of swimming which was evoked by weak electrical stimulation in the leech Hirudo medicinalis. The behavioural response to stimuli applied repeatedly to the body wall at an inter-trial interval (ITI) of 1 min decreased, eventually ceased, and then recovered spontaneously. More rapid reduction of the behavioural response occurred in repeated training sessions. This decrement of response conformed to the operational definition of habituation. Moreover, a noxious stimulus (i.e. brushing on the skin) facilitated the decremented response (dishabituation). In addition, we compared response decrement in naive animals with decrement in dishabituated and in sensitized animals. The analysis of the best fitting functions of the habituation, the habituation of dishabituation and the habituation of sensitization revealed interesting differences in these processes.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Habituação Psicofisiológica / Sanguessugas / Atividade Motora Limite: Animals Idioma: En Ano de publicação: 2001 Tipo de documento: Article
Buscar no Google
Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Habituação Psicofisiológica / Sanguessugas / Atividade Motora Limite: Animals Idioma: En Ano de publicação: 2001 Tipo de documento: Article