Dorsal Visual Pathway
Dorsal stream; “Where system”
The dorsal visual pathway is a functional stream originating in primary visual cortex and terminating in the superior parietal lobule that is responsible for the localization of objects in space and for action-oriented behaviors that depend on the perception of space.
Starting from the 1960s, scientists had intuitions that the visual system could be divided into two separate components, one responsible for recognition and the other for spatial localization (Held 1968; Schneider 1969). Mishkin and Ungerleider (1982) provided the first empirical evidence for this intuition, by showing that monkeys with inferior temporal cortex lesions had problems recognizing objects by their shape (what), while monkeys with parietal lobe lesions had problems in processing the location of objects in space (where). These findings provided evidence for anatomically and functionally distinct visual pathways: a “what” or “ventral”...
References and Readings
- Newcomb, F., & Ratcliff, G. (1989). Disorders of visuo-spatial analysis. In F. Boller & J. Grafman (Eds.), New reference. Amsterdam: Elsevier.Google Scholar