Automatic stimulus-induced medial premotor cortex activation without perception or action.

Automatic stimulus-induced medial premotor cortex activation without perception or action.
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DOI:
10.1371/journal.pone.0016613
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发表时间:
2011-02-02
期刊:
影响因子:
3.7
通讯作者:
Garraux G
Garraux G
中科院分区:
综合性期刊3区
文献类型:
--
作者:
D'Ostilio K;Garraux G

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谁曾经惊讶地在没有意识到的情况下又回到那碗咸花生,即使是在吃了适量并决定停止之后?我们在健康志愿者中使用快速事件相关功能磁共振成像(fMRI),研究了由阈下刺激引起的自动过程的神经相关性。我们证明,内侧前运动皮层无意识引发的运动程序的自动激活通常仅限于环境设定的特定上下文,但即使没有执行任何运动,也可能发生在意识阈值以下。这一新发现拓展了我们对无意识运动控制背后的大脑机制的看法,并提供了新的证据,证明运动准备系统的激活和意识并不是必然联系在一起的。
Who has ever been surprised to return to the bowl of salted peanuts without realizing it, even after having eating a moderate number and deciding to stop? Using rapid event-related functional magnetic resonance imaging (fMRI) in healthy volunteers, we investigated the neural correlates of automatic processes induced by subliminal stimuli. We demonstrated that the automatic activation of motor programs elicited unconsciously in the medial premotor cortex was normally restricted to specific contexts set by the environment, but can occur below the threshold of awareness even when no movement was executed. This novel finding expands our view on brain mechanisms underlying unconscious motor control and provides new evidence that activation of the motor preparation system and consciousness are not obligatory linked.
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