随意動作の開始に伴う姿勢筋の連合反応 : Ⅰ. 上肢挙上反応動作の大きさと反応方向の違いによる影響

URI http://harp.lib.hiroshima-u.ac.jp/h-bunkyo/metadata/1359
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Title
随意動作の開始に伴う姿勢筋の連合反応 : Ⅰ. 上肢挙上反応動作の大きさと反応方向の違いによる影響
Title Alternative
The organization of postural adjustments during voluntary arm movement : I. Effects of different amplitudes and directions of arm flexion on EMG discharges of postural muscles
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
anticipatony postural adjustment
arm flexion
preceding EMG disccharge
NDC
780
Abstract

The purpose of the experiments reported here was to further clarify the effect of varying arm flexion on anticipatory postural adjustments. To accomplish the purpose, we compared the effect of different movement amplitudes and directions on the timing and the magnitude of EMG activity in the postural muscle (biceps femoris and soleus) with those in the focal muscle (anterior deltoid). Latencies of preceding EMG activities of ipsilateral biceps femoris were not modified by varying movement amplitudes and directions. However, EMG magnitudes of ipsilateral biceps femoris and durations of silent phase of ipsilateral soleus were modified by varying movement amplitudes and directions. Another interesting observed evidence was that significant correlation coefficient was observed between latencies of preceding EMG activity of ipsilateral biceps femoris and EMG reaction times of anterior deltoid in one subject.
Those results suggest that onset of preceding EMG activities of ipsilateral postural muscles related to anticipatory postural adjustment are not only dependent on the speed of arm movement but also EMG reaction time in some case, and quality of EMG activity of postural muscles are modified by movement attributes (cf. moement amplitude and direction).

Journal Title
広島文教女子大学紀要
Volume
28
Spage
123
Epage
132
Published Date
1993-12-05
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
12
Old URI
Set
h-bunkyo