The Human Brain : From Neurone to Nervous System


  1. Middle cerebral artery occlusion is the commonest lesion causing stroke. Because the nerve fibres are so closely packed in the internal capsule, the consequences of loss of the blood supply to this area can affect the whole of one side of the body - the side opposite the affected hemisphere. In particular there can be paralysis and sensory loss, because important motor and sensory pathways pass though the affected internal capsule.

  2. Speech, Understanding and Vision can also be affected because the middle cerebral artey has a wide distribution including Wernicke's and Brocas's areas, and the optic tract and thalamus.