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A New Neural Framework for Visuospatial Processing

This paper presents a novel framework for understanding visuospatial processing, focusing on the ventral and dorsal streams of visual information in the brain. The ventral pathway, associated with object vision ("what"), connects the occipitotemporal cortex to the anterior temporal areas. In contrast, the dorsal pathway, linked to spatial vision ("where"), facilitates actions such as reaching and grasping via the occipitoparietal cortex. We delve into the components proposed by Mishkin et al., highlighting their relevance in spatial working memory, top-down control of eye movement, and spatial navigation.

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A New Neural Framework for Visuospatial Processing

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  1. A New Neural Framework for Visuospatial Processing • Amanda Ayoub • Alyssa Nolde • Kimberly Villalva • Baoyu Wang

  2. Ventral processing stream: “What” path Occipitotemporal cortex Anterior temporal target (TE) VLPFC Striate cortex Occipitoparietal cortex Posterior half of inferior parietal lobule (PG) DLPFC Dorsal processing stream: ”Where” path The Ventral and Dorsal Pathways • Ventral Pathway • “what” pathway • object vision • Dorsal Pathway • “where” pathway in the early theory • spatial vision • automatic and unconscious visual guided actions

  3. Occipitotemporal and Occipitoparietal Cortex • Occipitotemporal cortex • Connection between the occipital and temporal lobe • The ventral stream courses through this cortex to the anterior temporal area • Occipitoparietal cortex • Connection between the occipital and parietal lobe • This is where the dorsal stream courses to the posterior half of the inferior parietal lobe

  4. Three Components • The Three Components Porposed by Mishkin et. al • Parieto- prefrontal • top down control of eye movement • spatial working memory • Parieto- premotor • visually guided actions such as reaching and grasping • Parieto-medial temporal • spatial navigation

  5. Figure 1

  6. FIGURE 2a

  7. pos V2, V3, V4 MT sts V1 ips IPL MST V2, V3, V3A LIP VIP V6 MIP V6A

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