Dorsal stream:

a pathway that carries visual information from the primary visual cortex to the parietal lobe. According to one widely-accepted hypothesis, the dorsal stream (so named because of the path it takes along the dorsal side of the brain) carries information related to movement and spatial relationships between objects in the visual field. It is sometimes called the "where" pathway. See also: ventral stream.

Learn more: Know your brain - Primary visual cortex