Palmer E, Downes L, Ashby P
Playfair Neuroscience Unit, The Toronto Hospital (Western Division), Toronto, Ontario, Canada.
Neurology. 1996 Feb;46(2):471-5. doi: 10.1212/wnl.46.2.471.
A ballistic movement of one arm may be accompanied by contractions of contralateral postural muscles known as "associated postural adjustments." Ballistic movements are considered to involve the motor cortex, but it is not known where associated postural adjustments are generated. We recorded the EMG activity in the deltoid and latissimus dorsi muscles during ballistic abduction of the arm in 10 normal subjects and five subjects with lesions of the motor cortex. When subjects with cortical lesions abducted the unaffected arm, the associated postural adjustment in the contralateral latissimus dorsi was significantly smaller than normal. We argue that postural adjustments, like ballistic movements, require the participation of the motor cortex.
一侧手臂的弹道式运动可能会伴随着对侧姿势肌的收缩，即所谓的“联合姿势调整”。弹道式运动被认为涉及运动皮层，但联合姿势调整的产生部位尚不清楚。我们记录了10名正常受试者和5名运动皮层受损受试者在手臂进行弹道式外展时三角肌和背阔肌的肌电图活动。当皮层受损的受试者外展未受影响的手臂时，对侧背阔肌的联合姿势调整明显小于正常情况。我们认为，姿势调整与弹道式运动一样，需要运动皮层的参与。
