in·su·la 
(ĭnsə-lə, ĭnsyə-)
(ĭnsə-lə, ĭnsyə-)n. pl. in·su·lae (-lē′)
An oval region found in each hemisphere of the cerebral cortex, lateral to the lentiform nucleus and situated within the sylvian fissure, involved in sensation, emotion, and autonomic function. Also called island of Reil.
[New Latin īnsula, from Latin, island.]