Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus

The crab Chasmagnathus granulatus reacts to a shadow passing overhead with an escape response that habituates after 30 trials and for 5 days at least. The effect of a wide range of different intertrial intervals (ITIs) (0, 9, 27, 45, 81, 135, and 171 sec) on the Chasmagnathus long-term habituation (...

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Autores principales: Pedreira, M.E., Romano, A., Tomsic, D., Lozada, M., Maldonado, H.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 1998
Materias:
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Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00904996_v26_n1_p34_Pedreira
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spelling paperaa:paper_00904996_v26_n1_p34_Pedreira2023-06-12T16:45:57Z Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus Anim. Learn. Behav. 1998;26(1):34-45 Pedreira, M.E. Romano, A. Tomsic, D. Lozada, M. Maldonado, H. animal behavior animal experiment article crab escape behavior habituation long term memory male memory consolidation nonhuman time training Animalia Chasmagnathus Chasmagnathus Chasmagnathus granulata Decapoda (Crustacea) Invertebrata Iti The crab Chasmagnathus granulatus reacts to a shadow passing overhead with an escape response that habituates after 30 trials and for 5 days at least. The effect of a wide range of different intertrial intervals (ITIs) (0, 9, 27, 45, 81, 135, and 171 sec) on the Chasmagnathus long-term habituation (LTH) was evaluated at 24 h. Memory retention was estimated separately at two phases of a six-trial testing session: at first trial (the initial testing phase) and at the subsequent block of five trials (the retraining phase). A training of 30 trials with an ITI equal to or longer than 27 sec induced LTH at both testing phases, however, with a 0- or a 9- sec ITI, training wholly failed to build up LTH. When the number of trials was increased, a massed training (ITI = 0 or 9 sec) induced LTH at re- training but not at initial testing. Thus, massed training produces LTH only at retraining, whereas spaced training (ITI ≤ 27 sec) produces LTH at both initial phase and retraining. An ITI shift from training to testing diminished or abolished retention at retraining regardless of the direction of the shift, thus suggesting that crabs acquire a memory of the trial- spacing at training. According to these results, it is postulated that LTH consists of two memory components: one produced by spaced training and expressed at both initial testing and retraining, and one yielded by massed training and expressed only at retraining. The possibility that the two components of LTH were differentially affected by cycloxemide and context shift is discussed. Fil:Pedreira, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Romano, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tomsic, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lozada, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1998 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00904996_v26_n1_p34_Pedreira
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic animal behavior
animal experiment
article
crab
escape behavior
habituation
long term memory
male
memory consolidation
nonhuman
time
training
Animalia
Chasmagnathus
Chasmagnathus
Chasmagnathus granulata
Decapoda (Crustacea)
Invertebrata
Iti
spellingShingle animal behavior
animal experiment
article
crab
escape behavior
habituation
long term memory
male
memory consolidation
nonhuman
time
training
Animalia
Chasmagnathus
Chasmagnathus
Chasmagnathus granulata
Decapoda (Crustacea)
Invertebrata
Iti
Pedreira, M.E.
Romano, A.
Tomsic, D.
Lozada, M.
Maldonado, H.
Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus
topic_facet animal behavior
animal experiment
article
crab
escape behavior
habituation
long term memory
male
memory consolidation
nonhuman
time
training
Animalia
Chasmagnathus
Chasmagnathus
Chasmagnathus granulata
Decapoda (Crustacea)
Invertebrata
Iti
description The crab Chasmagnathus granulatus reacts to a shadow passing overhead with an escape response that habituates after 30 trials and for 5 days at least. The effect of a wide range of different intertrial intervals (ITIs) (0, 9, 27, 45, 81, 135, and 171 sec) on the Chasmagnathus long-term habituation (LTH) was evaluated at 24 h. Memory retention was estimated separately at two phases of a six-trial testing session: at first trial (the initial testing phase) and at the subsequent block of five trials (the retraining phase). A training of 30 trials with an ITI equal to or longer than 27 sec induced LTH at both testing phases, however, with a 0- or a 9- sec ITI, training wholly failed to build up LTH. When the number of trials was increased, a massed training (ITI = 0 or 9 sec) induced LTH at re- training but not at initial testing. Thus, massed training produces LTH only at retraining, whereas spaced training (ITI ≤ 27 sec) produces LTH at both initial phase and retraining. An ITI shift from training to testing diminished or abolished retention at retraining regardless of the direction of the shift, thus suggesting that crabs acquire a memory of the trial- spacing at training. According to these results, it is postulated that LTH consists of two memory components: one produced by spaced training and expressed at both initial testing and retraining, and one yielded by massed training and expressed only at retraining. The possibility that the two components of LTH were differentially affected by cycloxemide and context shift is discussed.
format Artículo
Artículo
publishedVersion
author Pedreira, M.E.
Romano, A.
Tomsic, D.
Lozada, M.
Maldonado, H.
author_facet Pedreira, M.E.
Romano, A.
Tomsic, D.
Lozada, M.
Maldonado, H.
author_sort Pedreira, M.E.
title Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus
title_short Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus
title_full Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus
title_fullStr Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus
title_full_unstemmed Massed and spaced training build up different components of long-term habituation in the crab Chasmagnathus
title_sort massed and spaced training build up different components of long-term habituation in the crab chasmagnathus
publishDate 1998
url http://hdl.handle.net/20.500.12110/paper_00904996_v26_n1_p34_Pedreira
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