A New Neural Framework for Visuospatial Processing

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

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6. FIGURE 2a

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