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Coordination of the arm during the a...

Heise, Gary David.

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Coordination of the arm during the acquisition of a novel, multijoint throwing skill.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Coordination of the arm during the acquisition of a novel, multijoint throwing skill./
作者:	Heise, Gary David.
面頁冊數:	146 p.
附註:	Source: Dissertation Abstracts International, Volume: 53-12, Section: B, page: 6206.
Contained By:	Dissertation Abstracts International53-12B.
標題:	Health Sciences, Human Development. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9311647

Coordination of the arm during the acquisition of a novel, multijoint throwing skill.
Heise, Gary David.

Coordination of the arm during the acquisition of a novel, multijoint throwing skill. - 146 p.

Source: Dissertation Abstracts International, Volume: 53-12, Section: B, page: 6206.

Thesis (Ph.D.)--The Pennsylvania State University, 1992.

The purposes of this investigation were to determine if individuals produce more joint power and redistribute or transfer more power and if muscle activity characteristics change during the acquisition of a planar, multijoint, throwing skill. Eighteen men threw a weighted tennis ball (0.67 kg) with their dominant arm at a target positioned 3.5 m away on the floor. Each subject performed 55 throwing trials and the resultant error was measured. The horizontal throwing motion of 25 trials, which made up 5 trial blocks, was videotaped. From video data and body segment inertial estimations, the rate of energy transferred by the joint reaction force and the power attributed to the joint moment were calculated. The muscle activity of six muscles involved in the throwing motion was measured. Dependent measures were statistically tested with a repeated measures multivariate analysis of variance.Subjects--Topical Terms:

1019218
Health Sciences, Human Development.

Coordination of the arm during the acquisition of a novel, multijoint throwing skill.
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035 $a (UnM)AAI9311647
035 $a AAI9311647
040 $a UnM $c UnM
100 1 $a Heise, Gary David. $3 1915285
245 1 0 $a Coordination of the arm during the acquisition of a novel, multijoint throwing skill.
300 $a 146 p.
500 $a Source: Dissertation Abstracts International, Volume: 53-12, Section: B, page: 6206.
500 $a Adviser: Richard C. Nelson.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 1992.
520 $a The purposes of this investigation were to determine if individuals produce more joint power and redistribute or transfer more power and if muscle activity characteristics change during the acquisition of a planar, multijoint, throwing skill. Eighteen men threw a weighted tennis ball (0.67 kg) with their dominant arm at a target positioned 3.5 m away on the floor. Each subject performed 55 throwing trials and the resultant error was measured. The horizontal throwing motion of 25 trials, which made up 5 trial blocks, was videotaped. From video data and body segment inertial estimations, the rate of energy transferred by the joint reaction force and the power attributed to the joint moment were calculated. The muscle activity of six muscles involved in the throwing motion was measured. Dependent measures were statistically tested with a repeated measures multivariate analysis of variance.
520 $a Error scores showed an expected improvement over trial blocks. Maximum power generated by the joint moment indicated that the elbow extensor musculature was the dominant power source for the movement and displayed the most changes across practice trials. The horizontal abductor of the shoulder generated less power and the musculature at the wrist generated virtually no power. Most of the power delivered across the wrist joint was due to the joint reaction force and changes were noted early in practice.
520 $a The temporal pattern of power generation and transfer at the joints displayed a proximal to distal sequence which was supported by EMG data. Neuromuscular degrees of freedom were not altered since no changes in the duration of coactivation of agonist-antagonist pairs were found. The high degree of coactivation across the wrist indicated that individuals constrained that joint throughout practice. Increases in muscle activity of the elbow extensor over the first three trial blocks occurred concurrently with increases in the individuals constrained that joint throughout practice. Increases in muscle activity of the elbow extensor over the first three trial blocks occurred concurrently with increases in the mechanical work done on the forearm by the extensor moment. This similarity between the change in mechanical output and the change in EMG activity was not observed for any other muscle group.
590 $a School code: 0176.
650 4 $a Health Sciences, Human Development. $3 1019218
650 4 $a Health Sciences, Recreation. $3 1018003
650 4 $a Biophysics, General. $3 1019105
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690 $a 0575
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710 2 0 $a The Pennsylvania State University. $3 699896
773 0 $t Dissertation Abstracts International $g 53-12B.
790 1 0 $a Nelson, Richard C., $e advisor
790 $a 0176
791 $a Ph.D.
792 $a 1992
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9311647