Judged: two independent readers; copy check clear.
Sylvian fissure
Sylvian fissure The Sylvian fissure, also called the lateral cerebral sulcus, is a major groove on the outer side of the brain.
The Sylvian fissure, also called the lateral cerebral sulcus, is a major groove on the outer side of the brain. It extends backward with a slight upward course and marks the boundary between the frontal and parietal lobes above and the temporal lobe below.