Operculum (Latin, meaning “little lid”) is the part of the cerebral cortex that covers the insula. Neuroscience divides the operculum into frontal, parietal and temporal regions, after the lobes of which they form a part. The part of the operculum on the precentral and postcentral gyri, on either side of the central sulcus (or “Rolandic fissure”), is known as the Rolandic operculum.
see pars opercularis.
The dominant hemisphere frontal operculum may contain critical speech and language pathways, and due to these properties, patients with tumors of the opercular region may be at higher risk for postoperative speech dysfunction. However, the likelihood of incurring temporary or permanent language dysfunction is unknown.
see operculum glioma