In human brain anatomy, an operculum (Latin, meaning "little lid") (pl.
The insular lobe is a portion of the cerebral cortex that has invaginated to lie deep within the lateral sulcus.
[3] The part of the parietal operculum that forms the ceiling of the lateral sulcus functions as the secondary somatosensory cortex.
[5] Opinions differ on whether Albert Einstein's brain possessed parietal opercula.
[7] Einstein's lower parietal lobe (which is involved in mathematical thought, visuospatial cognition and imagery of movement) was 15% larger than average.