Age-related deficits of long-term memory in the crab Chasmagnathus

Short- and long-term memory in adult crabs Chasmagnathus granulatus of different age are evaluated in two learning paradigms: habituation to a visual danger stimulus and appetitive conditioning. No difference between young, middle-aged and aged animals is found in short-term habituation with 15 trai...

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Detalles Bibliográficos
Publicado: 1996
Materias:
Aging
Appetitive conditioning
Habituation
Invertebrates
Memory
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v178_n1_p139_Tomsic
http://hdl.handle.net/20.500.12110/paper_03407594_v178_n1_p139_Tomsic
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03407594_v178_n1_p139_Tomsic
record_format dspace
spelling paper:paper_03407594_v178_n1_p139_Tomsic2023-06-08T15:34:13Z Age-related deficits of long-term memory in the crab Chasmagnathus Aging Appetitive conditioning Habituation Invertebrates Memory Short- and long-term memory in adult crabs Chasmagnathus granulatus of different age are evaluated in two learning paradigms: habituation to a visual danger stimulus and appetitive conditioning. No difference between young, middle-aged and aged animals is found in short-term habituation with 15 training trials. A good level of retention of the habituated response at 24 h is exhibited by young and middle-aged crabs but a poor one by aged crabs. When the training-to-testing interval is lengthened to 48 h or the training session reduced to 7 trials, young and middle-aged crabs continue to show long-term habituation but aged individuals exhibit no retention at all. As regards appetitive conditioning, young, middle-aged and aged crabs present similar short-term memory with 5 training trials and similar long-term memory when tested at 24 h, but an age-related deficit in long-term retention is exhibited when the intersession interval is lengthened to 48 h or the training reduced to 3 trials. Thus, a reduction of long-term memory related to age is demonstrated in the crab Chasmagnathus. Since it is shown in two different learning paradigms, the possibility of explaining the deficit in terms of a failure in memory mechanisms due to aging rather than as a consequence of ontogenetic shift in the crab's behavior is discussed. 1996 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v178_n1_p139_Tomsic http://hdl.handle.net/20.500.12110/paper_03407594_v178_n1_p139_Tomsic
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Aging
Appetitive conditioning
Habituation
Invertebrates
Memory
spellingShingle Aging
Appetitive conditioning
Habituation
Invertebrates
Memory
Age-related deficits of long-term memory in the crab Chasmagnathus
topic_facet Aging
Appetitive conditioning
Habituation
Invertebrates
Memory
description Short- and long-term memory in adult crabs Chasmagnathus granulatus of different age are evaluated in two learning paradigms: habituation to a visual danger stimulus and appetitive conditioning. No difference between young, middle-aged and aged animals is found in short-term habituation with 15 training trials. A good level of retention of the habituated response at 24 h is exhibited by young and middle-aged crabs but a poor one by aged crabs. When the training-to-testing interval is lengthened to 48 h or the training session reduced to 7 trials, young and middle-aged crabs continue to show long-term habituation but aged individuals exhibit no retention at all. As regards appetitive conditioning, young, middle-aged and aged crabs present similar short-term memory with 5 training trials and similar long-term memory when tested at 24 h, but an age-related deficit in long-term retention is exhibited when the intersession interval is lengthened to 48 h or the training reduced to 3 trials. Thus, a reduction of long-term memory related to age is demonstrated in the crab Chasmagnathus. Since it is shown in two different learning paradigms, the possibility of explaining the deficit in terms of a failure in memory mechanisms due to aging rather than as a consequence of ontogenetic shift in the crab's behavior is discussed.
title Age-related deficits of long-term memory in the crab Chasmagnathus
title_short Age-related deficits of long-term memory in the crab Chasmagnathus
title_full Age-related deficits of long-term memory in the crab Chasmagnathus
title_fullStr Age-related deficits of long-term memory in the crab Chasmagnathus
title_full_unstemmed Age-related deficits of long-term memory in the crab Chasmagnathus
title_sort age-related deficits of long-term memory in the crab chasmagnathus
publishDate 1996
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03407594_v178_n1_p139_Tomsic
http://hdl.handle.net/20.500.12110/paper_03407594_v178_n1_p139_Tomsic
_version_ 1768543182466842624

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