Station 3: Blood supply to the brain

Question 1

Where are the broca and wernicke areas?

Answer 1

Left hemisphere:
90% of right handed people
70% left handed people

Question 2

What areas of the brain are effected in a middle cerebral artery stroke?

Answer 2

Motor cortex (head, neck, trunk, arm)
Sensory cortex (head, neck, trunk, arm)
Auditory cortex

If of the left MCA then also:
Broca’s area (expressive speech)
Wernicke’s area (receptive speech)

Question 3

What areas of the brain are effected in a anterior cerebral artery stroke?

Answer 3

Motor cortex (lower limb)
Sensory cortex (lower limb)
Pre-frontal cortex (motivation/planning/organising/complex behaviour)
Supplemental motor (dominant hemisphere) -> function with Broca's area to initiate speech

Question 4

What areas of the brain are effected in a posterior cerebral artery stroke? Which cranial nerve can be effected?

Answer 4

Primary visual cortex
(occipital lobe)
PCA runs on the midbrain with oculomotor (CNIII) isolated palsy:
Left PCA infarct -> right homonymous hemianopia (CONTRALATERAL)

Question 5

What areas of the brain are effected with a vertebral artery stroke?

Answer 5

Posterior inferior cerebellar artery -> cerebellar stroke, brainstem
DANISHP
DO WE NEED MORE THAN THIS

Question 6

The FAST campaign is describing a stroke of which artery? Why?

Answer 6

Middle cerebral artery

Question 7

What are the anatomical relations of Broca and Wernicke areas?

Answer 7

Broca is more anterior to Wernickes