Individual differences in subconscious motor control predicted by GABA concentration in SMA.

Individual differences in subconscious motor control predicted by GABA concentration in SMA.
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DOI:
10.1016/j.cub.2010.09.003
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发表时间:
2010-10-12
期刊:
Current biology : CB
影响因子:
--
通讯作者:
Sumner P
Sumner P
中科院分区:
其他
文献类型:
--
作者:
Boy F;Evans CJ;Edden RA;Singh KD;Husain M;Sumner P

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潜意识视觉刺激会影响运动计划,但这种影响的大小因个体而异。在这里,我们调查了这种差异是否可能与人与人之间的神经化学差异有关。在更多主要抑制性神经递质GABA的影响下,皮质反应性预计会降低。因此,我们假设,如果一个人在辅助运动区(SMA)--一个以前与自动运动控制相关的区域--有更多的GABA,这将导致较小的潜意识效应。我们测量了反向掩蔽的素数或负相容效应,发现它与磁共振光谱测量的GABA浓度密切相关。这特别发生在SMA区域,而不是在进行光谱测量的其他区域。我们在一个独立的队列中重复了这些结果:SMA区域中较多的GABA与较小的效应大小可靠地相关。这些发现表明,在个体中,潜意识运动机制的反应性与SMA中GABA的浓度有关。
Subliminal visual stimuli affect motor planning but the size of such effects differs greatly between individuals. Here we investigated whether such variation may be related to neurochemical differences between people. Cortical responsiveness is expected to be lower under the influence of more of the main inhibitory neurotransmitter, GABA. Thus we hypothesized that if an individual has more GABA in the supplementary motor area (SMA) – a region previously associated with automatic motor control – this would result in smaller subliminal effects. We measured the reversed masked prime – or negative compatibility – effect, and found that it correlated strongly with GABA concentration, measured with magnetic resonance spectroscopy. This occurred specifically in the SMA region and not in other regions from which spectroscopy measurements were taken. We replicated these results in an independent cohort: more GABA in the SMA region is reliably associated with smaller effect size. These findings suggest that, across individuals, the responsiveness of subconscious motor mechanisms is related to GABA concentration in the SMA.
尾状反应的抑制是由尾状和丘脑介导的:功能性MRI和亨廷顿氏病的证据。
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