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首页> 外文期刊>The European Journal of Neuroscience >Selective activation of the ventrolateral prefrontal cortex in the human brain during active retrieval processing.
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Selective activation of the ventrolateral prefrontal cortex in the human brain during active retrieval processing.

机译：在主动检索过程中人脑腹侧前额叶皮层的选择性激活。

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摘要

The present study examined the role of the prefrontal cortex in retrieval processing using functional magnetic resonance imaging in human subjects. Ten healthy subjects were scanned while they performed a task that required retrieval of specific aspects of visual information. In order to examine brain activity specifically associated with retrieval, we designed a task that had retrieval and control conditions that were perfectly matched in terms of depth of encoding, decision making and postretrieval monitoring and differed only in terms of whether retrieval was required. In the retrieval condition, based on an instructional cue, the subjects had to retrieve either the particular stimulus that was previously presented or its location. In the control condition, the cue did not instruct retrieval but shared with the instructional cues the function of alerting the subjects of the impending test phase. The comparison of activity between the retrieval and control conditions demonstrated a significant and selective increase in activity related to retrieval processes within the ventrolateral prefrontal cortical region, more specifically within area 47/12. These activity increases were bilateral but stronger in the right hemisphere. The present study by strictly controlling the level of encoding, postretrieval monitoring, and decision making has demonstrated a specific increase in the ventrolateral prefrontal region that could be clearly related to active retrieval processing, i.e. the active selection of particular stored visual representations.
机译：本研究检查了前额叶皮层在使用功能性磁共振成像的人类受试者的检索过程中的作用。十名健康的受试者在执行一项需要检索视觉信息特定方面的任务时被扫描。为了检查与检索特别相关的大脑活动，我们设计了一个任务，该任务的检索和控制条件在编码深度，决策制定和检索后监视方面完全匹配，仅在是否需要检索方面有所不同。在检索条件下，根据指导性提示，受试者必须检索先前显示的特定刺激或其位置。在控制条件下，提示没有指示检索，而是与指示提示共享了提醒对象即将进行的测试阶段的功能。检索条件和对照条件之间的活动比较表明，与腹外侧前额叶皮层区域内，特别是在区域47/12内的检索过程相关的活动显着和选择性增加。这些活动增加是双侧的，但在右半球更强。通过严格控制编码水平，检索后监视和决策水平的本研究表明，腹侧前额叶区域的特定增加可能与主动检索处理（即主动选择特定存储的视觉表示）明显相关。

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