Complexity of human postural control in young and older adults during prolonged standing
Aging is known to have a degrading influence on many structures and functions of the human sensorimotor system. The present work assessed aging-related changes in postural sway using fractal and complexity measures of the center of pressure (COP) dynamics with the hypothesis that complexity and frac...
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| Veröffentlicht in: | Experimental brain research 2008-11, Vol.191 (3), p.265-276 |
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| creator | Duarte, Marcos Sternad, Dagmar |
| description | Aging is known to have a degrading influence on many structures and functions of the human sensorimotor system. The present work assessed aging-related changes in postural sway using fractal and complexity measures of the center of pressure (COP) dynamics with the hypothesis that complexity and fractality decreases in the older individuals. Older subjects (68 ± 4 years) and young adult subjects (28 ± 7 years) performed a quiet stance task (60 s) and a prolonged standing task (30 min) where subjects were allowed to move freely. Long-range correlations (fractality) of the data were estimated by the detrended fluctuation analysis (DFA); changes in entropy were estimated by the multi-scale entropy (MSE) measure. The DFA results showed that the fractal dimension was lower for the older subjects in comparison to the young adults but the fractal dimensions of both groups were not different from a 1/
f
noise, for time intervals between 10 and 600 s. The MSE analysis performed with the typically applied adjustment to the criterion distance showed a higher degree of complexity in the older subjects, which is inconsistent with the hypothesis that complexity in the human physiological system decreases with aging. The same MSE analysis performed without adjustment showed no differences between the groups. Taken all results together, the decrease in total postural sway and long-range correlations in older individuals are signs of an adaptation process reflecting the diminishing ability to generate adequate responses on a longer time scale. |
| doi_str_mv | 10.1007/s00221-008-1521-7 |
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f
noise, for time intervals between 10 and 600 s. The MSE analysis performed with the typically applied adjustment to the criterion distance showed a higher degree of complexity in the older subjects, which is inconsistent with the hypothesis that complexity in the human physiological system decreases with aging. The same MSE analysis performed without adjustment showed no differences between the groups. Taken all results together, the decrease in total postural sway and long-range correlations in older individuals are signs of an adaptation process reflecting the diminishing ability to generate adequate responses on a longer time scale.</description><identifier>ISSN: 0014-4819</identifier><identifier>EISSN: 1432-1106</identifier><identifier>DOI: 10.1007/s00221-008-1521-7</identifier><identifier>PMID: 18696056</identifier><identifier>CODEN: EXBRAP</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer-Verlag</publisher><subject>Adult ; Aged ; Aging - physiology ; Biological and medical sciences ; Biomedical and Life Sciences ; Biomedicine ; Development. Senescence. Regeneration. Transplantation ; Entropy ; Fractals ; Fundamental and applied biological sciences. Psychology ; Humans ; Middle Aged ; Models, Neurological ; Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration ; Neurology ; Neurosciences ; Nonlinear Dynamics ; Posture - physiology ; Research Article ; Vertebrates: nervous system and sense organs ; Young Adult</subject><ispartof>Experimental brain research, 2008-11, Vol.191 (3), p.265-276</ispartof><rights>Springer-Verlag 2008</rights><rights>2008 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c496t-5a937599ec69958ba68a574f260eced37a576f924984ac005c0d0c4228b45eba3</citedby><cites>FETCH-LOGICAL-c496t-5a937599ec69958ba68a574f260eced37a576f924984ac005c0d0c4228b45eba3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s00221-008-1521-7$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s00221-008-1521-7$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51298</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20814618$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18696056$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Duarte, Marcos</creatorcontrib><creatorcontrib>Sternad, Dagmar</creatorcontrib><title>Complexity of human postural control in young and older adults during prolonged standing</title><title>Experimental brain research</title><addtitle>Exp Brain Res</addtitle><addtitle>Exp Brain Res</addtitle><description>Aging is known to have a degrading influence on many structures and functions of the human sensorimotor system. The present work assessed aging-related changes in postural sway using fractal and complexity measures of the center of pressure (COP) dynamics with the hypothesis that complexity and fractality decreases in the older individuals. Older subjects (68 ± 4 years) and young adult subjects (28 ± 7 years) performed a quiet stance task (60 s) and a prolonged standing task (30 min) where subjects were allowed to move freely. Long-range correlations (fractality) of the data were estimated by the detrended fluctuation analysis (DFA); changes in entropy were estimated by the multi-scale entropy (MSE) measure. The DFA results showed that the fractal dimension was lower for the older subjects in comparison to the young adults but the fractal dimensions of both groups were not different from a 1/
f
noise, for time intervals between 10 and 600 s. The MSE analysis performed with the typically applied adjustment to the criterion distance showed a higher degree of complexity in the older subjects, which is inconsistent with the hypothesis that complexity in the human physiological system decreases with aging. The same MSE analysis performed without adjustment showed no differences between the groups. Taken all results together, the decrease in total postural sway and long-range correlations in older individuals are signs of an adaptation process reflecting the diminishing ability to generate adequate responses on a longer time scale.</description><subject>Adult</subject><subject>Aged</subject><subject>Aging - physiology</subject><subject>Biological and medical sciences</subject><subject>Biomedical and Life Sciences</subject><subject>Biomedicine</subject><subject>Development. Senescence. Regeneration. Transplantation</subject><subject>Entropy</subject><subject>Fractals</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Middle Aged</subject><subject>Models, Neurological</subject><subject>Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration</subject><subject>Neurology</subject><subject>Neurosciences</subject><subject>Nonlinear Dynamics</subject><subject>Posture - physiology</subject><subject>Research Article</subject><subject>Vertebrates: nervous system and sense organs</subject><subject>Young Adult</subject><issn>0014-4819</issn><issn>1432-1106</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNqFkUuLFDEQgIMo7rj6A7xIEPTWayWd51EGX7Cwl13wFjLp9NpLOmmTDjj_3jQzuCCIp6SKrypV-RB6TeCKAMgPBYBS0gGojvB2kU_QjrCedoSAeIp2AIR1TBF9gV6U8rCFvYTn6IIooQVwsUPf92legv81rUecRvyjzjbiJZW1ZhuwS3HNKeAp4mOq8R7bOOAUBp-xHWpYCx5qnlp-aVSK937AZW1MS71Ez0Ybin91Pi_R3edPt_uv3fXNl2_7j9edY1qsHbe6l1xr74TWXB2sUJZLNlIB3vmhly0So6ZMK2YdAHcwgGOUqgPj_mD7S_T-1LeN8LP6spp5Ks6HYKNPtZi2KAdByX9BSoBK2W_g27_Ah1RzbEs0hhOqGPQNIifI5VRK9qNZ8jTbfDQEzCbHnOSYJsdscoxsNW_Ojeth9sNjxdlGA96dAVucDWO20U3lD0dBESaIahw9cWXZft_nxwn__fpvLe2mGw</recordid><startdate>20081101</startdate><enddate>20081101</enddate><creator>Duarte, Marcos</creator><creator>Sternad, Dagmar</creator><general>Springer-Verlag</general><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>0-V</scope><scope>3V.</scope><scope>7QP</scope><scope>7QR</scope><scope>7RV</scope><scope>7TK</scope><scope>7TM</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>88G</scope><scope>88J</scope><scope>8AO</scope><scope>8FD</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ALSLI</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>K9.</scope><scope>KB0</scope><scope>M0S</scope><scope>M1P</scope><scope>M2M</scope><scope>M2R</scope><scope>NAPCQ</scope><scope>P64</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PSYQQ</scope><scope>Q9U</scope><scope>RC3</scope><scope>7X8</scope></search><sort><creationdate>20081101</creationdate><title>Complexity of human postural control in young and older adults during prolonged standing</title><author>Duarte, Marcos ; Sternad, Dagmar</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c496t-5a937599ec69958ba68a574f260eced37a576f924984ac005c0d0c4228b45eba3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Adult</topic><topic>Aged</topic><topic>Aging - physiology</topic><topic>Biological and medical sciences</topic><topic>Biomedical and Life Sciences</topic><topic>Biomedicine</topic><topic>Development. Senescence. Regeneration. Transplantation</topic><topic>Entropy</topic><topic>Fractals</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Middle Aged</topic><topic>Models, Neurological</topic><topic>Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration</topic><topic>Neurology</topic><topic>Neurosciences</topic><topic>Nonlinear Dynamics</topic><topic>Posture - physiology</topic><topic>Research Article</topic><topic>Vertebrates: nervous system and sense organs</topic><topic>Young Adult</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Duarte, Marcos</creatorcontrib><creatorcontrib>Sternad, Dagmar</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Social Sciences Premium Collection</collection><collection>ProQuest Central (Corporate)</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Nursing & Allied Health Database</collection><collection>Neurosciences Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Psychology Database (Alumni)</collection><collection>Social Science Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Technology Research Database</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Social Science Premium Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Database (Alumni Edition)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>ProQuest Psychology</collection><collection>Social Science Database</collection><collection>Nursing & Allied Health Premium</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest One Psychology</collection><collection>ProQuest Central Basic</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Experimental brain research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Duarte, Marcos</au><au>Sternad, Dagmar</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Complexity of human postural control in young and older adults during prolonged standing</atitle><jtitle>Experimental brain research</jtitle><stitle>Exp Brain Res</stitle><addtitle>Exp Brain Res</addtitle><date>2008-11-01</date><risdate>2008</risdate><volume>191</volume><issue>3</issue><spage>265</spage><epage>276</epage><pages>265-276</pages><issn>0014-4819</issn><eissn>1432-1106</eissn><coden>EXBRAP</coden><abstract>Aging is known to have a degrading influence on many structures and functions of the human sensorimotor system. The present work assessed aging-related changes in postural sway using fractal and complexity measures of the center of pressure (COP) dynamics with the hypothesis that complexity and fractality decreases in the older individuals. Older subjects (68 ± 4 years) and young adult subjects (28 ± 7 years) performed a quiet stance task (60 s) and a prolonged standing task (30 min) where subjects were allowed to move freely. Long-range correlations (fractality) of the data were estimated by the detrended fluctuation analysis (DFA); changes in entropy were estimated by the multi-scale entropy (MSE) measure. The DFA results showed that the fractal dimension was lower for the older subjects in comparison to the young adults but the fractal dimensions of both groups were not different from a 1/
f
noise, for time intervals between 10 and 600 s. The MSE analysis performed with the typically applied adjustment to the criterion distance showed a higher degree of complexity in the older subjects, which is inconsistent with the hypothesis that complexity in the human physiological system decreases with aging. The same MSE analysis performed without adjustment showed no differences between the groups. Taken all results together, the decrease in total postural sway and long-range correlations in older individuals are signs of an adaptation process reflecting the diminishing ability to generate adequate responses on a longer time scale.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><pmid>18696056</pmid><doi>10.1007/s00221-008-1521-7</doi><tpages>12</tpages></addata></record> |
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| ispartof | Experimental brain research, 2008-11, Vol.191 (3), p.265-276 |
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| subjects | Adult Aged Aging - physiology Biological and medical sciences Biomedical and Life Sciences Biomedicine Development. Senescence. Regeneration. Transplantation Entropy Fractals Fundamental and applied biological sciences. Psychology Humans Middle Aged Models, Neurological Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration Neurology Neurosciences Nonlinear Dynamics Posture - physiology Research Article Vertebrates: nervous system and sense organs Young Adult |
| title | Complexity of human postural control in young and older adults during prolonged standing |
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