Muscle coordination during rapid force production by young and older adults

被引:34
作者
Barry, BK [1 ]
Riek, S [1 ]
Carson, RG [1 ]
机构
[1] Univ Queensland, Sch Human Movement Studies, Percept & Motor Syst Lab, Brisbane, Qld, Australia
来源
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES | 2005年 / 60卷 / 02期
基金
澳大利亚研究理事会;
关键词
D O I
10.1093/gerona/60.2.232
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
Background. Older adults typically exhibit dramatic reductions in the rate of force development and deficits in the execution of rapid coordinated movements. The purpose of the current study was to investigate the association between the reduced rate of force development exhibited by older adults and the ability to coordinate groups of muscles. Methods. The performance of a visually guided aiming task that required the generation of isometric torque about the elbow joint was compared in 10 young adults (age range, 19 to 29 years) and 10 older adults (age range, 65 to 80 years). Participants were required to exert isometric torque in flexion, extension, pronation, or supination, or in combinations of these directions, to reach a target in minimum time. Surface electromyograms were obtained from the biceps brachii, triceps brachii, brachioradialis, and flexor carpi radialis. Results. Older participants exhibited slower target acquisition times compared with young participants (p < .05), with the extent of the differences between the groups varying markedly between target locations. Conclusions. The impairment in performance, although partially attributable to a general decline in the ability to produce force rapidly, was also affected by the requirements for muscular coordination. At the neuromuscular level, differences between the young and the elderly were expressed most prominently in the bifunctional muscle biceps brachii and in certain temporal aspects of muscular coordination.
引用
收藏
页码:232 / 240
页数:9
相关论文
共 42 条
[1]  
Bean JF, 2002, J AM GERIATR SOC, V50, P461
[2]   STRATEGIES FOR MUSCLE ACTIVATION DURING ISOMETRIC TORQUE GENERATION AT THE HUMAN ELBOW [J].
BUCHANAN, TS ;
ROVAI, GP ;
RYMER, WZ .
JOURNAL OF NEUROPHYSIOLOGY, 1989, 62 (06) :1201-1212
[3]   Old adults exhibit greater motor output variability than young adults only during rapid discrete isometric contractions [J].
Christou, EA ;
Carlton, LG .
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES, 2001, 56 (12) :B524-B532
[4]  
Cohen J., 1969, STAT POWER ANAL BEHA
[5]   KINEMATICS OF ARM MOVEMENTS IN ELDERLY HUMANS [J].
COOKE, JD ;
BROWN, SH ;
CUNNINGHAM, DA .
NEUROBIOLOGY OF AGING, 1989, 10 (02) :159-165
[6]   CONTROL OF SIMPLE ARM MOVEMENTS IN ELDERLY HUMANS [J].
DARLING, WG ;
COOKE, JD ;
BROWN, SH .
NEUROBIOLOGY OF AGING, 1989, 10 (02) :149-157
[7]   Biomechanical simulations of forward fall arrests: effects of upper extremity arrest strategy, gender and aging-related declines in muscle strength [J].
DeGoede, KM ;
Ashton-Miller, JA .
JOURNAL OF BIOMECHANICS, 2003, 36 (03) :413-420
[8]   Cortical projections to spinal motoneurons: Changes with aging and amyotrophic lateral sclerosis [J].
Eisen, A ;
EntezariTaher, M ;
Stewart, H .
NEUROLOGY, 1996, 46 (05) :1396-1404
[9]   Exercise strategies should be designed to increase muscle power [J].
Evans, WJ .
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES, 2000, 55 (06) :M309-M310
[10]   Association of muscle power with functional status in community-dwelling elderly women [J].
Foldvari, M ;
Clark, M ;
Laviolette, LC ;
Bernstein, MA ;
Kaliton, D ;
Castaneda, C ;
Pu, CT ;
Hausdorff, JM ;
Fielding, RA ;
Singh, MAF .
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES, 2000, 55 (04) :M192-M199