The insular cortex (abbrev. insula) is a structure of the human brain. It lies deep to the brain's lateral surface, within the lateral sulcus which separates the temporal lobe and inferior parietal cortex.

Insular cortex.

Do they both have the same function

Brodmann's areas are specific regions of the cerebral cortex. Some areas and their functions include: Area 4 (primary motor cortex) for voluntary movement, Area 17 (primary visual cortex) for visual perception, Area 41 and 42 (primary auditory cortex) for auditory processing, and Area 44 and 45 in the left hemisphere (Broca's area) for speech production.

THE DEFINITION OF INSULAR: RELATING TO; CHARACTERISTIC OF, OR SITUATED ON AN ISLAND; NARROW OR ISOLATED.

EXAMPLE:

You seem too sophisticated to hold such insular opinions.