White matter sheet that continues ventrally as the internal capsule and dorsally as the semioval center.

This sheet of axons contains both descending and ascending axons that carry nearly all of the neural traffic from and to the cerebral cortex.

The corona radiata is associated with the corticospinal tract, the corticopontine tract, and the corticobulbar tract.

The long insular arteries originate from the insular portion of the middle cerebral artery and supply the corona radiata and the descending motor tract.

The M2 segments also give rise to long perforating branches that travel posteriorly and superiorly on the insula and supply the corona radiata ¹⁾.

These branches must be preserved to avoid ischemic injury resulting in hemiparesis ²⁾.