Blood supply to the brain Flashcards Preview

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Flashcards in Blood supply to the brain Deck (13):
1

Internal carotid artery

enters the circle of Willis and divides to form the anterior cerebral and middle cerebral arteries

2

Anterior cerebral arteries

supplies the medial and superior strip of the lateral aspect of the cerebral cortex up to the parietal/occipital border

3

Middle cerebral artery

-supplies most of the lateral aspect of the cerebral cortex
-includes Broca and Wernicke's areas in dominant hemisphere

4

Posterior cerebral artery

-arises from basilar artery and supplies the inferomedial temporal lobe and the occipital lobe

5

Blood supply to the medulla

-posterior inferior cerebellar arteries and anterior spinal branches of the vertebral arteries

6

Blood supply to Pons

-supplied by basilar artery that runs along the midline of the pons

7

Carotid system TIA

-Amaurosis Fugax- blockade of retinal arteries
-Aphasia
-Hemiparesis
-Hemisensory loss
-Hemianopic visual loss

8

Vertebrobasilar TIA

-diplopia, vertigo, vomiting
-choking and dysarthria
-ataxia
-alexia without agraphia
-hemisensory loss
-hemianopic visual loss
-transient global amnesia
-tetraparesis
-loss of consciousness (rare)

9

Anterior cerebral artery

-supplies medial suface
-bilateral infract causes quadriparesis (legs weaker than arms) and akinetic mutism (ventromedial or cingulate syndrome)

10

Recurrent artery of Huebner

-branch of the ACA
-supplies the head of caudate nucleus
-lesion causes agitation, confusion and evolves to akinesia, abulia (absence of willpower), with mutism and personality changes

11

Anterior branches of the upper division of the middle cerebral artery

-supplies the lateral prefrontal cortex
-lesion causes planning deficits, impairment of working memory and apathy
-DLPFC dysfunction

12

Anterior communicating artery

-supplies basal forebrain
-lesion causes akinesia and personality change (orbitofrontal dysfunction) with a confabulatory amnesia resembling Wernicke-Korsakoff's syndrome

13

Posterior inferior cerebellar artery (PICA) thrombosis

- supplies the lateral medulla
-Wallenberg's lateral medullary syndrome
-acute vertigo with cerebellar signs
-Ipsilateral face numbness, diplopia, nystagmus, Horner's syndrome and 9th/10th nerve palsy with contraalateral spinothalamic sensory loss and mild hemiparesis