Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement Dynamics
Aging is characterized by a general decline in physiological and behavioral function that has been widely interpreted within the context of the loss of complexity hypothesis. In this paper, we examine the relation between aging, neuromuscular function and physiological-behavioral complexity in the a...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Aging Research |
| Online Access: | http://dx.doi.org/10.1155/2012/891218 |
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| author | S. Morrison K. M. Newell |
| author_facet | S. Morrison K. M. Newell |
| author_sort | S. Morrison |
| collection | DOAJ |
| description | Aging is characterized by a general decline in physiological and behavioral function that has been widely interpreted within the context of the loss of complexity hypothesis. In this paper, we examine the relation between aging, neuromuscular function and physiological-behavioral complexity in the arm-hand effector system, specifically with reference to physiological tremor and isometric force production. Experimental findings reveal that the adaptive behavioral consequences of the aging-related functional decline in neurophysiological processes are less pronounced in simple motor tasks which provides support for the proposition that the motor output is influenced by both extrinsic (e.g., task related) and intrinsic (e.g., coordination, weakness) factors. Moreover, the aging-related change in complexity can be bidirectional (increase or decrease) according to the influence of task constraints on the adaptation required of the intrinsic properties of the effector system. |
| format | Article |
| id | doaj-art-edea5d971a834adb896071240bf58ac6 |
| institution | Kabale University |
| issn | 2090-2204 2090-2212 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Aging Research |
| spelling | doaj-art-edea5d971a834adb896071240bf58ac62025-02-03T06:12:42ZengWileyJournal of Aging Research2090-22042090-22122012-01-01201210.1155/2012/891218891218Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement DynamicsS. Morrison0K. M. Newell1School of Physical Therapy, Old Dominion University, Norfolk, VA 23529, USADepartment of Kinesiology, Pennsylvania State University, State College, PA 16801, USAAging is characterized by a general decline in physiological and behavioral function that has been widely interpreted within the context of the loss of complexity hypothesis. In this paper, we examine the relation between aging, neuromuscular function and physiological-behavioral complexity in the arm-hand effector system, specifically with reference to physiological tremor and isometric force production. Experimental findings reveal that the adaptive behavioral consequences of the aging-related functional decline in neurophysiological processes are less pronounced in simple motor tasks which provides support for the proposition that the motor output is influenced by both extrinsic (e.g., task related) and intrinsic (e.g., coordination, weakness) factors. Moreover, the aging-related change in complexity can be bidirectional (increase or decrease) according to the influence of task constraints on the adaptation required of the intrinsic properties of the effector system.http://dx.doi.org/10.1155/2012/891218 |
| spellingShingle | S. Morrison K. M. Newell Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement Dynamics Journal of Aging Research |
| title | Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement Dynamics |
| title_full | Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement Dynamics |
| title_fullStr | Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement Dynamics |
| title_full_unstemmed | Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement Dynamics |
| title_short | Aging, Neuromuscular Decline, and the Change in Physiological and Behavioral Complexity of Upper-Limb Movement Dynamics |
| title_sort | aging neuromuscular decline and the change in physiological and behavioral complexity of upper limb movement dynamics |
| url | http://dx.doi.org/10.1155/2012/891218 |
| work_keys_str_mv | AT smorrison agingneuromusculardeclineandthechangeinphysiologicalandbehavioralcomplexityofupperlimbmovementdynamics AT kmnewell agingneuromusculardeclineandthechangeinphysiologicalandbehavioralcomplexityofupperlimbmovementdynamics |