上腕の運動方向の違いが三角筋の筋放電パターンに及ぼす影響

URI http://harp.lib.hiroshima-u.ac.jp/h-bunkyo/metadata/5608
File
Title
上腕の運動方向の違いが三角筋の筋放電パターンに及ぼす影響
Title Alternative
Effects of Different Directions of Arm Movement on EMG Discharge Patterns of Deltoid Muscle
Author
氏名 川西 正行
ヨミ カワニシ マサユキ
別名 Kawanishi Masayuki
氏名 笠井 達哉
ヨミ カサイ タツヤ
別名 Kasai Tatsuya
氏名 矢作 晋
ヨミ ヤハギ ススム
別名 Yahagi Susumu
Subject
deltoid muscle
agonist-antagonist activity
shoulder abduction angle
shoulder flexion movement
NDC
780
Abstract

The present study was undertaken to investigate the direction-sensitivity of the arm control system using an appropriately modified version of the shoulder flexion movement. The results indicated that small initial shoulder abduction angles were associated with longer agonist (anterior deltoid muscle) EMG durations. Moreover, as initial shoulder abduction angles became smaller, EMG onsets of the antagonist (posterior deltoid muscle) occurred nearer to those of the agonist. Modulations of duration of the agonist EMG burst can be explained by changes in movement amplitudes. With regard to modification of time difference between agonist and antagonist, the interpretation concerns the changing role of the antagonist to a synergist dependent on decreased initial shoulder abduction angles. Based on the present findings, it is suggested that shoulder abduction angles are an important determinant of agonist-antagonist muscle activity of deltoid during flexion of the shoulder.

Journal Title
広島文教女子大学紀要
Volume
30
Spage
203
Epage
211
Published Date
1995-12-25
Publisher
広島文教女子大学 : 広島文教女子大学短期大学部
ISSN
0919181X
NCID
AN10402507
Language
jpn
NIIType
Departmental Bulletin Paper
Text Version
Sort Key
16
Old URI
Set
h-bunkyo