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Flashcards in blood supply Deck (26):
1

Anterior circulation

- INTERNAL CAROTID = 80% of blood supply

--> opthalamic

--> posterior cummunicating artery

--> anterior choroidal artery

--> anterior cerebral artery

--> middle cerebral artery

--> Ganlionic striate (lenticulostriate) arteries

2

ophthalmic artery

- main blood supply to RETINA

3

anterior choroidal artery

- supplies:

--> OPTIC TRACT
--> Choroid plexus

--> cerebral peduncles

--> posterior limb of the INTERNAL CAPSULE
--> globus pallidus

--> putamen and THALAMUS

4

Anterior cerebral artery

- Supplies MEDIAL ASPECT of the FRONTAL and PARIETAL LOBE and MEDIAL SENSORIMOTOR CORTEX

--> Pericallosal and callosomarginal

--> anterior choroidal

--> recurrent artery of Heubner

 

5

Pericallosal and callosomarginal

- Occlusion causes deficits, MOTOR AND SOMATOSENSORY, IN THE CONTRALATERAL LEG

6

Recurrent artery of heubner

- supplies portions of the CAUDATE NUCLEUS, ANTERIOR PUTAMEN, GLOBUS PALLIDUS and INTERNAL CAPSULE

7

Middle cerebral artery

- Supplies virtually the entire LATERAL SURFACE of the cerebral hemispheres

--> superior division

--> inferior division

--> lateral striate (lenticulostriate) arteries

8

Superior division of middle cerebral artery

- Cortex above the LATERAL FISSUE

--> supplies lateral and frontal cortex including precentral and postcentral gyri

9

inferior division of middle cerebral artery

- Cortex below the lateral fissue

- Supplies lateral temporal lobe, parts of the PARIETAL LOBE

10

Lateral striate (lenticulostraite) arteries

- branches before MIDDLE CEREBRAL artery enters the lateral fissue

--> supplies BASAL GANGLIA and the internal capsule

--> prone to narrowing in patients with HYPERTENSION

11

define watershed zones

- regions of the cortex between two cerebral vessels

- Infarcts in these areas can occur with severe drops in systemic blood pressure

12

Posterior circulation

- VERTEBRAL = 20% of blood supply to cortex

--> posterior spinal artery

--> anterior spinal artery

--> posterior inferior cerebellar artery (PICA)

--> Anterior inferior cerebellar artery (AICA)

--> superior cerebellar artery

--> pontine arteries

--> posterior cerebral artery

13

Posterior spinal artery

- off vertebral a

- Runs caudally on the dorsolateral aspect of the spinal cord

--> supplies dorsal region of the caudal medulla

14

Anterior spinal artery

- Off vertebral a

- Join its mate from the opposite side forming one single artery

- Runs along the ventral midline of the spinal cord

- PARAMEDIAN BRANCHES supply medial regions of the caudal medulla

15

Posterior inferiron cerebellar artery (PICA)

- off vertebral a

- Long circumferential branch

- Supplies the inferior surface of the cerebellum, choroid plexus, lateral regions of the caudal medulla

16

Anterior inferior cerebellar artery (AICA)

- off of basilar artery

- Long circumferential branch

- supplies the anterior, inferior surface of cerebellum, rostral regions of the medulla and caudal regions of the lateral pons

17

Superior cerebellar artery

- off basilar artery

- supplies the superior surface of the cerebellum, caudal midbrain and rostral pons

- may give off a quadrigeminal artery to corpora quadrigemina of the midbrain

18

Pontine arteries

- off basilar artery

- PARAMEDIAN branches supply medial regions of the pons

- SHORT CIRCUMFERENTIAL branches supply intermediate regions of the pons

19

Posterior cerebral artery

- arises from bifurcation of the basilar artery at the level of midbrain

- SUPPLIES the midbrain, most of the thalamus, medial and inferior surfaces of the occipital and temporal lobes

- MAY give off a quadrigeminal artery to the corpora quadrigemina of the midbrain

--> Thalamoperforator arteries

--> posterior choroidal artery

20

thalamoperforator arteries

- supply the thalamus and portion of the posterior limb of the internal capsule

21

posterior choroidal artery

- supplies portion of the thalamus

22

Wada test

- cannulate the internal carotid artery and infuse barbiturates to put the cortex to sleep

- patient will read passages until unconscious

- depending on speech before unconscious state will determine dominant hemisphere

- primarily done on left-handed individuals

23

blood flow to rostral midbrain

24

blood supply to pons

25

blood supply to rostral medulla

26

blood supply of caudal medulla