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首页> 外文期刊>The European Journal of Neuroscience >The neural correlate of very-long-term picture priming.
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The neural correlate of very-long-term picture priming.

机译：长期图片启动的神经相关。

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Repetition priming denotes a behavioural change caused by prior exposure to a stimulus. The effect is known to last for weeks. This study addresses the underlying neural mechanisms for very-long-term picture priming by using event-related functional magnetic resonance imaging complemented by a behavioural paradigm. Previous functional imaging studies with shorter retention intervals have shown that priming is associated with changes in the activity of both the occipital and posterior temporal cortex. In this study we compared retention intervals of 1 day and 6 weeks after initial exposure to a picture stimulus. Priming-related decreases in cortical activity in posterior extrastriate and dorsal left inferior frontal areas were found only for the shorter retention interval. In contrast, fMRI activation in the inferior posterior temporal and anterior left inferior frontal cortex was reduced following priming for both retention intervals. In the behavioural paradigm, the priming effect was stable over time. We conclude that the left inferior frontal and inferior posterior temporal cortex play a key role in the very-long-term priming effect.
机译：重复启动表示由先前暴露于刺激引起的行为改变。已知效果持续数周。这项研究通过使用与事件相关的功能磁共振成像以及行为范式的补充，解决了用于长期图片启动的潜在神经机制。先前具有较短保留间隔的功能成像研究表明，启动与枕骨和颞后皮质活动的变化有关。在这项研究中，我们比较了初次接触图片刺激后1天和6周的保留间隔。仅在较短的保留时间间隔内，发现了与后纹状体和左后额叶下部额叶皮层活动有关的启动相关的下降。相反，对于两个保留间隔，启动后在颞下颞和左前额下部皮质中的fMRI激活均降低。在行为范式中，启动作用随时间稳定。我们得出的结论是，左下额叶皮质和颞下后叶皮质在非常长期的启动作用中起关键作用。

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