Tool manipulation knowledge is retrieved by way of the ventral visual object processing pathway.

Tool manipulation knowledge is retrieved by way of the ventral visual object processing pathway.
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DOI:
10.1016/j.cortex.2013.05.004
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发表时间:
2013-10
期刊:
影响因子:
3.6
通讯作者:
Mahon, Bradford Z.
Mahon, Bradford Z.
中科院分区:
心理学2区
文献类型:
--
作者:
Almeida, Jorge;Fintzi, Anat R.;Mahon, Bradford Z.

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在这里,我们发现,使用功能性磁共振成像(fMRI),对象操作知识是通过腹侧对象处理路径获取的。我们利用了小细胞通道投射到腹侧而不是背侧流的事实,并表明当这些刺激仅对腹侧对象处理流可见时,在顶下小叶中观察到工具刺激的神经反应增加。在对照条件下,在上顶叶区域和后顶叶区域观察到滴定刺激的工具偏好,以便通过背侧视觉通路可见。功能连接分析根据顶叶皮层的主要传入输入是通过腹侧还是背侧视觉通路来确认顶叶皮层子区域之间的分离。这些结果挑战了“工具识别的具体假设”,根据该假设,工具识别关键取决于对象操作知识的模拟。相反,这些数据表明,与对象相关的操作知识的检索取决于访问对象的身份,这是一个受腹侧视觉通路支持的过程。
Here we find, using functional Magnetic Resonance Imaging (fMRI), that object manipulation knowledge is accessed by way of the ventral object processing pathway. We exploit the fact that parvocellular channels project to the ventral but not the dorsal stream, and show that increased neural responses for tool stimuli are observed in the inferior parietal lobule when those stimuli are visible only to the ventral object processing stream. In a control condition, tool-preferences were observed in a superior and posterior parietal region for stimuli titrated so as to be visible by the dorsal visual pathway. Functional connectivity analyses confirm the dissociation between sub-regions of parietal cortex according to whether their principal afferent input is via the ventral or dorsal visual pathway. These results challenge the ‘Embodied Hypothesis of Tool Recognition’, according to which tool identification critically depends on simulation of object manipulation knowledge. Instead, these data indicate that retrieval of object-associated manipulation knowledge is contingent on accessing the identity of the object, a process that is subserved by the ventral visual pathway.
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