Stroke; middle cerebrum artery, bark branches

Stroke; Arteria cerebri media Rami corticales

A stroke of the middle cerebrum artery, after the blood vessel has passed the limb insulae and before it divides into its main trunks, causes muscle weakness/paralysis and sensory impairment within the opposite half of the body counting from the head down to some distance below the navel.
In addition, there is loss of (blindness in) one half of the visual field in both eyes opposite the side where the injury is located (right- or left-sided homonymous hemianopsia), and that the eyes look to the side where the injury is located; gaze direction palsy.
If the injury is in the left hemisphere of the brain, the sufferer suffers from extensive (global) speech paralysis (aphasia). A right-sided injury gives a severe left-sided neglect.