Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study

Ahmed O Tantawy,1 Hamdy N El Tallawy,2 Hussein RS Farghaly,3 Wafaa M Farghaly,3 Amr S Hussein1 1Educational Psychology Department, Faculty of Education, 2Neurology and Psychiatry Department, 3Nuclear Medicine Unit, Faculty of Medicine, Assiut University, Assiut, Arab Republic of Egypt Background and...

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Autores principales:	Tantawy AO, El Tallawy HN, Farghaly HRS, Farghaly WM, Hussein AS
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2013
Materias:	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
Acceso en línea:	https://doaj.org/article/bd501bb4ca4b4b14932d993537665812
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spelling	oai:doaj.org-article:bd501bb4ca4b4b14932d9935376658122021-12-02T01:29:49ZImpact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study1176-63281178-2021https://doaj.org/article/bd501bb4ca4b4b14932d9935376658122013-03-01T00:00:00Zhttp://www.dovepress.com/impact-of-nocturnal-sleep-deprivation-on-declarative-memory-retrieval--a12590https://doaj.org/toc/1176-6328https://doaj.org/toc/1178-2021Ahmed O Tantawy,1 Hamdy N El Tallawy,2 Hussein RS Farghaly,3 Wafaa M Farghaly,3 Amr S Hussein1 1Educational Psychology Department, Faculty of Education, 2Neurology and Psychiatry Department, 3Nuclear Medicine Unit, Faculty of Medicine, Assiut University, Assiut, Arab Republic of Egypt Background and methods: This study investigated the effects of sleep deprivation on total and partial (early and late) declarative memory and activation in the areas of the brain involved in these activities. The study included two experiments. Experiment 1 included 40 male residents of an orphanage aged 16–19 years, who were divided into four groups (n = 10 each) and subjected to total sleep deprivation, normal sleep, early-night sleep deprivation, or late-night sleep deprivation. Experiment 2 included eight students from the same institution who were divided into the same four groups (n = 2) as in experiment 1. Declarative memory was tested using lists of associated word pairs in both experiments, and activation of the relevant brain regions was measured before and after retrieval by single-photon emission computed tomography for subjects in experiment 2 only. Results: Students subjected to normal sleep had significantly higher scores for declarative memory retrieval than those subjected to total sleep deprivation (P = 0.002), early-night sleep deprivation (P = 0.005), or late-night sleep deprivation (P = 0.02). The left temporal lobe showed the highest rate of activity during memory retrieval after normal sleep, whereas the frontal, parietal, and right temporal lobes were more active after sleep deprivation. Conclusion: Both slow wave sleep and rapid eye movement sleep play an active role in consolidation of declarative memory, which in turn allows memory traces to be actively reprocessed and strengthened during sleep, leading to improved performance in memory recall. Keywords: late-night sleep deprivation, early-night sleep deprivation, total sleep deprivation, declarative memoryTantawy AOEl Tallawy HNFarghaly HRSFarghaly WMHussein ASDove Medical PressarticleNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol 2013, Iss default, Pp 403-408 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
spellingShingle	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 Tantawy AO El Tallawy HN Farghaly HRS Farghaly WM Hussein AS Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study
description	Ahmed O Tantawy,1 Hamdy N El Tallawy,2 Hussein RS Farghaly,3 Wafaa M Farghaly,3 Amr S Hussein1 1Educational Psychology Department, Faculty of Education, 2Neurology and Psychiatry Department, 3Nuclear Medicine Unit, Faculty of Medicine, Assiut University, Assiut, Arab Republic of Egypt Background and methods: This study investigated the effects of sleep deprivation on total and partial (early and late) declarative memory and activation in the areas of the brain involved in these activities. The study included two experiments. Experiment 1 included 40 male residents of an orphanage aged 16–19 years, who were divided into four groups (n = 10 each) and subjected to total sleep deprivation, normal sleep, early-night sleep deprivation, or late-night sleep deprivation. Experiment 2 included eight students from the same institution who were divided into the same four groups (n = 2) as in experiment 1. Declarative memory was tested using lists of associated word pairs in both experiments, and activation of the relevant brain regions was measured before and after retrieval by single-photon emission computed tomography for subjects in experiment 2 only. Results: Students subjected to normal sleep had significantly higher scores for declarative memory retrieval than those subjected to total sleep deprivation (P = 0.002), early-night sleep deprivation (P = 0.005), or late-night sleep deprivation (P = 0.02). The left temporal lobe showed the highest rate of activity during memory retrieval after normal sleep, whereas the frontal, parietal, and right temporal lobes were more active after sleep deprivation. Conclusion: Both slow wave sleep and rapid eye movement sleep play an active role in consolidation of declarative memory, which in turn allows memory traces to be actively reprocessed and strengthened during sleep, leading to improved performance in memory recall. Keywords: late-night sleep deprivation, early-night sleep deprivation, total sleep deprivation, declarative memory
format	article
author	Tantawy AO El Tallawy HN Farghaly HRS Farghaly WM Hussein AS
author_facet	Tantawy AO El Tallawy HN Farghaly HRS Farghaly WM Hussein AS
author_sort	Tantawy AO
title	Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study
title_short	Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study
title_full	Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study
title_fullStr	Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study
title_full_unstemmed	Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study
title_sort	impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study
publisher	Dove Medical Press
publishDate	2013
url	https://doaj.org/article/bd501bb4ca4b4b14932d993537665812
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Impact of nocturnal sleep deprivation on declarative memory retrieval in students at an orphanage: a psychoneuroradiological study

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