Age-related differences in the control of multijoint movements

Caroline J. Ketcham, Natalia Dounskaia, George E. Stelmach

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

The present study investigates whether regulation of interactive torque during multijoint movements decays with advanced age as a result of declines in the motor system. Young and elderly adults repeatedly drew a circle and ovals oriented in different directions using shoulder and elbow joint movements. Each template was traced at three levels of cycling frequency with and without vision. Although vision did not affect performance, increases in cycling frequency caused distortions of movement trajectories in both groups. The pattern of distortions differed, however, between the groups. These differences were accounted for by differences in elbow control. Young adults provided regulation of elbow amplitude and timing by matching muscle torque magnitude with increased interactive torque. In contrast, elderly adults did not increase muscle torque magnitude and modulated torque timing for elbow motion regulation. This strategy is discussed as adaptation to decrements in the aging motor system.

Original languageEnglish (US)
Pages (from-to)422-436
Number of pages15
JournalMotor control
Volume8
Issue number4
DOIs
StatePublished - Oct 2004

Keywords

  • Aging
  • EMG
  • Kinematics
  • Kinetics
  • Torque analysis

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Clinical Neurology
  • Physiology (medical)

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  • Cite this

    Ketcham, C. J., Dounskaia, N., & Stelmach, G. E. (2004). Age-related differences in the control of multijoint movements. Motor control, 8(4), 422-436. https://doi.org/10.1123/mcj.8.4.422