Isolated left posterior insular infarction and convergent roles in verbal fluency, language, memory, and executive function.

The insular cortex is a hidden structure located in the Sylvian fissure surrounded by the temporal, frontal, and parietal lobes. It is a complex structure interconnecting various brain regions that contribute to autonomic, gustatory, auditory, and speech and language function as well as somatosensory perception and emotional response (1). The arteries supplying the insular area mainly originate from the M2 segment of the middle cerebral artery (2). This article presents a case of isolated left posterior insular infarction (PII) resulting in impairment in multiple cognitive domains.