The Journal of Korean Physical Therapy

  • 제22권6호
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  • Pages.43-51
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  • 2010
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  • 1229-0475(pISSN)
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  • 2287-156X(eISSN)
대한물리치료학회 (The Korean Society of Physical Therapy)
권호 표지

Learning a Single Joint Perception-Action Coupling: A Pilot Study

  • Ryu, Young-Uk (Department of Physical Therapy, College of Health Science, Catholic University of Daegu)
  • 투고 : 2010.11.03
  • 심사 : 2010.12.06
  • 발행 : 2010.12.25
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초록

Purpose: This study examined the influence of visuomotor congruency on learning a relative phase relationship between a single joint movement and an external signal. Methods: Participants (N=5) were required to rhythmically coordinate elbow flexion-extension movements with a continuous sinusoidal wave (0.375 Hz) at a $90^{\circ}$ relative phase relationship. The congruent group was provided online feedback in which the elbow angle decreased (corresponding to elbow flexion) as the angle trajectory was movingup, and vice versa. The incongruent group was provided online feedback in which the elbow angle decreased as the angle trajectory was moving down, and vice versa. There were two practice sessions (day 1 and 2) and each session consisted of 6 trials per block (5 blocks per session). Retention tests were performed 24 hours after session 2, and only the external sinusoidal wave was provided. Repeated ANOVAs were used for statistical analysis. Results: During practice, the congruent group was significantly less variable than the incongruent group. Phase variability in the incongruent group did not significantly change across blocks, while variability decreased significantly in the congruent group. In retention, the congruent group produced the required $90^{\circ}$ relative phase pattern with significantly less phase variability than the incongruent group. Conclusions: Congruent visual feedback facilitates learning. Moreover, the deprivation of online feedback does not affect the congruent group but does affect the incongruent group in retention.

키워드

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