Quick Facts
The lateral sulcus (aka lateral sulcus of cerebrum, Sylvian fissure, or fossa of Sylvius) is a deep groove located along the surface of the cerebral cortex. It is the most prominent of the cortical sulci, and it divides the frontal and parietal lobes superiorly from the temporal lobe inferiorly. It has three parts; the large posterior ramus, the short anterior ramus, and the short ascending ramus.
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Lateral Sulcus
The lateral sulcus is a deep fissure that is first identified on the inferior surface of the brain close to the anterior perforated substance but becomes most visible on the lateral surface where it separates the frontal and parietal lobes from the temporal lobe.
