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Kroppskomposition och kognition: Muskelmassans betydelse för kognitiva funktioner hosöverviktiga individer med stillasittande arbete
Umeå University, Faculty of Social Sciences, Department of Psychology.
Umeå University, Faculty of Social Sciences, Department of Psychology.
2015 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [sv]

Kroppskompositionens påverkan på kognitionen har tidigare framförallt studerats hos äldre individer. Därhar forskning påvisat ett samband mellan en minskad muskelmassa och försämringar i kognitiva funktioner.Hur sambandet ser ut tidigare i livet är mindre kartlagt. Eftersom kroppskomposition är något som går attpåverka genom olika fysiska interventioner finns det anledning att undersöka om detta samband även kanpåvisas hos en yngre population. För att studera detta testades 80 forskningspersoner (M= 50.8år) med etttestbatteri bestående av nio deltest som avsåg att mäta episodminne, exekutiva funktioner, snabbhet samtarbetsminne. De fick även genomgå en DXA-mätning, som är en metod med lågintensiv röntgenstrålning därmängden fettmassa och muskelmassa kan beräknas. Vidare genomfördes även en strukturell hjärnavbildningför att mäta hippocampusvolym samt en 2 veckors insamling av accelerometerdata. Resultatet visar ettsignifikant negativt samband mellan storleken på muskelmassan, LeanIndex, och prestationerna i domänenepisodminne. Ett signifikant samband påvisades även mellan volymen på höger hippocampus och LeanIndexhos kvinnor. De signifikanta sambanden upphävdes när fysisk aktivitet togs med som kovariat. Resultatetvisar på en komplex relation mellan muskelmassa och kognition och indikerar att vidare forskning behövs föratt klargöra detta samband ytterligare.

Abstract [en]

The effect of body composition on cognition is a subject that primarily has been studied in elderly populations.Research has demonstrated a link between a reduced muscle mass and deterioration of cognitive functions.This link is less studied in early life. Because body composition is something that can be influenced by variousphysical interventions it is important to study if these links also can be detected in younger populations. Tostudy this relationship, 80 trial participants (M = 50.8år) underwent a cognitive assessment consisting of ninesubtests intended to measure episodic memory, executive functions, speed and working memory. They alsounderwent a DXA scan, which is a low intensity x-ray to measure amount of fat- and muscle mass. Further,they carried out a structural brain imaging to measure hippocampal volume and a two weeks period ofcollecting accelerometer data. The results show a significant negative correlation between the size of musclemass, LeanIndex, and achievements in the domain of episodic memory. A significant correlation was alsodetected between the right hippocampus volume and LeanIndex in women. When physical activity was addedas covariate the correlations was annulled. The results from this study demonstrates a complex relationshipbetween muscle mass and cognition and indicates a need for further studies to clarify this association.

Place, publisher, year, edition, pages
2015.
Series
The effect of body composition on cognition is a subject that primarily has been studied in elderly populations. Research has demonstrated a link between a reduced muscle mass and deterioration of cognitive functions. This link is less studied in early life. Because body composition is something that can be influenced by various physical interventions it is important to study if these links also can be detected in younger populations. To study this relationship, 80 trial participants (M = 50.8år) underwent a cognitive assessment consisting of nine subtests intended to measure episodic memory, executive functions, speed and working memory. They also underwent a DXA scan, which is a low intensity x-ray to measure amount of fat- and muscle mass. Further, they carried out a structural brain imaging to measure hippocampal volume and a two weeks period of collecting accelerometer data. The results show a significant negative correlation between the size of muscle mass, LeanIndex, and achievements in the domain of episodic memory. A significant correlation was also detected between the right hippocampus volume and LeanIndex in women. When physical activity was added as covariate the correlations was annulled. The results from this study demonstrates a complex relationship between muscle mass and cognition and indicates a need for further studies to clarify this association.
National Category
Psychology
Identifiers
URN: urn:nbn:se:umu:diva-104069OAI: oai:DiVA.org:umu-104069DiVA: diva2:817201
Subject / course
Examensarbete i psykologi
Educational program
Study Programme for University Diploma in Psychology
Supervisors
Available from: 2015-06-18 Created: 2015-06-04 Last updated: 2015-06-18Bibliographically approved

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