Interactions Between Shape Perception and Egocentric Localization
Neuropsychological studies of patients with damage to either the temporal or parietal region have suggested that these areas can be broadly divided into two functionally different pathways, a ventral “what” pathway for feature-related object vision and a dorsal “where” pathway for motor-oriented spatial vision (Milner and Goodale 1995; Mishkin and Ungerleider 1982). This is a reasonable separation since humans must resolve what an object is regardless of where it is to achieve object recognition, and vice versa to plan body actions in relation to the object. Neuroanatomical studies in the monkey cerebral cortex have demonstrated that parietal and temporal cortical areas are heavily connected with each other (Felleman and Van Essen 1991). Given the similarity between human and monkey cortical architecture (Van Essen 2003), it is expected that human temporal and parietal areas also have similar inter-connections. Such interconnections would imply potential interactions between the temporal and parietal areas. However, it remains unclear how deeply these areas actually interact with each other. Concerning this question, we report recent studies suggesting that illusory perception of an object location called “saccadic compression of visual space” affects the perception of object shapes.
KeywordsVisual Space Illusory Contour Subjective Contour Shape Perception Saccade Onset
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