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The Effect of Uncertainty About Ball Weight On Anticipatory Muscle Activity In A One-Handed Catching Task

Eckerle, Jason J.
http://rave.ohiolink.edu/etdc/view?acc_num=miami1291984661

Abstract Details

2010, Master of Science in Exercise and Health Studies, Miami University, Physical Education, Health, and Sport Studies.
To determine the effect of uncertainty about ball weight on anticipatory muscle activity in catching, anticipatory postural adjustments (APAs) in one-handed catching of balls of known and unknown weights were compared. Twenty-nine (N = 29) male college students participated in the study. Each participant’s muscle activity in the biceps brachii, triceps brachii, wrist flexor group, and bilateral erector spinae (L4-L5) was measured using EMG while he caught visually identical balls of four different weights (1.1, 2.9, 4.8 and 6.6 lb). EMG integrals were computed for the one second prior to ball drop (pre-drop period), and the time between ball drop and catch (drop period). Uncertainty about ball weight had no effect on APA activity during the pre-drop period. During the drop period, however, uncertainty about ball weight did influence APA activity in the biceps brachii and the wrist flexor group, but the effect depended on the weight of the ball. In the known ball weight condition for both the biceps and wrist flexors, participants exhibited significantly stronger APAs with each increase in ball weight. In contrast, under unknown ball weight condition, APA strength was high and did not change with each increase in ball weight. For the biceps and wrist flexors, the hypothesis that when the weight of the ball was unknown, the CNS would prepare for the ‘worst case scenario’, i.e., the heaviest ball, was confirmed.
William Berg, PhD (Advisor)
Rose Marie Ward, PhD (Committee Member)
Brett Massie, PhD (Committee Member)
31 p.
Health Sciences; Kinesiology
anticipatory postural adjustment; catching; motor control

Recommended Citations

Citations

  • Eckerle, J. J. (2010). The Effect of Uncertainty About Ball Weight On Anticipatory Muscle Activity In A One-Handed Catching Task [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1291984661

    APA Style (7th edition)

  • Eckerle, Jason. The Effect of Uncertainty About Ball Weight On Anticipatory Muscle Activity In A One-Handed Catching Task. 2010. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1291984661.

    MLA Style (8th edition)

  • Eckerle, Jason. "The Effect of Uncertainty About Ball Weight On Anticipatory Muscle Activity In A One-Handed Catching Task." Master's thesis, Miami University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1291984661

    Chicago Manual of Style (17th edition)

miami1291984661
451
© 2010, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.