Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task

Abstract Aging affects individuals of every species, with sometimes detrimental effects on memory and cognition. The simultaneous-chaining task, a sequential-learning task, requires subjects to select items in a predetermined sequence, putting demands on memory and cognitive processing capacity. It...

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Autores principales:	Christina Meier, Parisa Sepehri, Debbie M. Kelly
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/39883e44349d468a9a17f9c48f9e2db2
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spelling	oai:doaj.org-article:39883e44349d468a9a17f9c48f9e2db22021-12-02T15:09:23ZAge affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task10.1038/s41598-021-96360-12045-2322https://doaj.org/article/39883e44349d468a9a17f9c48f9e2db22021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96360-1https://doaj.org/toc/2045-2322Abstract Aging affects individuals of every species, with sometimes detrimental effects on memory and cognition. The simultaneous-chaining task, a sequential-learning task, requires subjects to select items in a predetermined sequence, putting demands on memory and cognitive processing capacity. It is thus a useful tool to investigate age-related differences in these domains. Pigeons of three age groups (young, adult and aged) completed a locomotor adaptation of the task, learning a list of four items. Training began by presenting only the first item; additional items were added, one at a time, once previous items were reliably selected in their correct order. Although memory capacity declined noticeably with age, not all aged pigeons showed impairments compared to younger pigeons, suggesting that inter-individual variability emerged with age. During a subsequent free-recall memory test in the absence of reinforcement, when all trained items were presented alongside novel distractor items, most pigeons did not reproduce the trained sequence. During a further forced-choice test, when pigeons were given a choice between only two of the trained items, all three age groups showed evidence of an understanding of the ordinal relationship between items by choosing the earlier item, indicating that complex cognitive processing, unlike memory capacity, remained unaffected by age.Christina MeierParisa SepehriDebbie M. KellyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christina Meier Parisa Sepehri Debbie M. Kelly Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task
description	Abstract Aging affects individuals of every species, with sometimes detrimental effects on memory and cognition. The simultaneous-chaining task, a sequential-learning task, requires subjects to select items in a predetermined sequence, putting demands on memory and cognitive processing capacity. It is thus a useful tool to investigate age-related differences in these domains. Pigeons of three age groups (young, adult and aged) completed a locomotor adaptation of the task, learning a list of four items. Training began by presenting only the first item; additional items were added, one at a time, once previous items were reliably selected in their correct order. Although memory capacity declined noticeably with age, not all aged pigeons showed impairments compared to younger pigeons, suggesting that inter-individual variability emerged with age. During a subsequent free-recall memory test in the absence of reinforcement, when all trained items were presented alongside novel distractor items, most pigeons did not reproduce the trained sequence. During a further forced-choice test, when pigeons were given a choice between only two of the trained items, all three age groups showed evidence of an understanding of the ordinal relationship between items by choosing the earlier item, indicating that complex cognitive processing, unlike memory capacity, remained unaffected by age.
format	article
author	Christina Meier Parisa Sepehri Debbie M. Kelly
author_facet	Christina Meier Parisa Sepehri Debbie M. Kelly
author_sort	Christina Meier
title	Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task
title_short	Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task
title_full	Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task
title_fullStr	Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task
title_full_unstemmed	Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task
title_sort	age affects pigeons’ (columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/39883e44349d468a9a17f9c48f9e2db2
work_keys_str_mv	AT christinameier ageaffectspigeonscolumbaliviamemorycapacitybutnotrepresentationofserialorderduringalocomotorsequentiallearningtask AT parisasepehri ageaffectspigeonscolumbaliviamemorycapacitybutnotrepresentationofserialorderduringalocomotorsequentiallearningtask AT debbiemkelly ageaffectspigeonscolumbaliviamemorycapacitybutnotrepresentationofserialorderduringalocomotorsequentiallearningtask
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Age affects pigeons’ (Columba livia) memory capacity but not representation of serial order during a locomotor sequential-learning task

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