Arterial Supply

Question 1

Long-Short: Internal carotid

Answer 1

Long: Middle, anterior cerebral aa.
Short: Posterior communicating a., Anterior choroidal a.

Question 2

Long-Short: Anterior cerebral a.

Answer 2

Long: Cortical branches to medial aspect of frontal and parietal lobes, Arteries to corpus callosum
Short: Medial striate artery/Recurrent artery of Huebner

Question 3

Long-short: Middle cerebral a.

Answer 3

Long: Cortical branches to frontal, parietal, temporal lobes
Short: Lenticulostriate aa.

Question 4

Long-Short: Vertebral a.

Answer 4

Long: Posterior inferior cerebellar a., posterior spinal aa.
Short: Anterior spinal a.

Question 5

Long-Short: Basillar a.

Answer 5

Long: Superior cerebellar a., Pontine aa. (Long), Anterior inferior cerebellar a.
Short: Pontine aa. (Short)

Question 6

Long-Short: Posterior cerebral a.

Answer 6

Long: Cortical branches to occipital lobe and medial aspect of temporal lobe
Short: Posterior choroidal a., Aa. to thalamus (thalamoperforating)

Question 7

Internal Carotid - Cervical Part

Answer 7

C1, from bifurcation to carotid canal

Question 8

Internal Carotid - Petrous Part

Answer 8

C2: Within the carotid canal

Question 9

Internal Carotid - Cavernous Part

Answer 9

C3 - Within the cavernous sinus

Question 10

Internal Carotid - Supraclinoid/Intracranial/Cerebral Part

Answer 10

Pierces the dura mater
Ophthalmic aa supply the orbits and optic n.
Posterior communicating aa. anastomose with posterior cereberal aa.
Anterior choroidal aa. - Deep cortical structures

Question 11

Anterior Cerebral Aa

Answer 11

Smaller of the two terminal branches of internal carotid
Linked by anterior communicating artery
Located within the longitudinal fissure
Form the callosomarginal and the pericallosal a.
Deep branches called medial striate aa. supply the internal capsule

Question 12

Supplied by ACA

Answer 12

Cingulate gyrus, optic chiasm, medial aspect of frontal and parietal lobes including the motor and somatosensory areas of the cortex for lower limbs

Question 13

ACA Infarct

Answer 13

Behavior changes (frontal lobe)
Contralateral leg and foot weakness (precentral gyrus)
Contralateral leg and foot sensory loss (postcentral gyrus)

Question 14

Middle Cerebral Aa.

Answer 14

Larger of the two terminal branches of internal carotid aa.
Runs in lateral sulcus (Sylvian fissure)
Deep branches called lenticulostriate aa. supply the basal ganglia and internal capsule
Long/circumfrential branch bifurcates into superior and inferior divisions

Question 15

Supplied by MCA

Answer 15

Super division - Lateral surface of frontal lobe and the anterior portion of the parietal lobe
Infer division - Medial and lateral temporal lobe, temporal pole and posterior portions of the parietal lobe

Question 16

MCA Infarct

Answer 16

Right superior - Weakness and or sensory loss of left face, hand, arm and trunk
Left superior - Weakness and or sensory loss of right face, hand, arm and trunk; Broca’s aphasia
Right inferior - Sensory loss from left face, hand and arm (Left hemineglect)
Left inferior - Sensory loss from right face, hand and arm; Wernicke’s aphasia

Question 17

Vertebral aa.

Answer 17

Pass through the transverse foramina of cervical vertebrae and enter cranial cavity through the foramen magnum, anastomose to form the basilar a.

Question 18

Anterior spinal a.

Answer 18

Fuses with its partner to form a single long branch that runs within the anterior median fissure and supplies the anterior 2/3 of the cervical spinal cord and the anterior and middle medulla including the medullary pyramids

Question 19

Posterior spinal aa.

Answer 19

Branch from the vertebral aa. or from the posterior inferior cerebellar aa.
Each descends near the dorsal roots and supplies post. 1/3rd of the cervical spinal cord and the posterior part of the caudal medulla

Question 20

Posterior inferior cerebellar aa.

Answer 20

Branch from vertebral aa. to supply the inferior surface of the cerebellum , the lateral part of the rostral medulla and the choroid plexus of the 4th ventricle

Question 21

Basillar Artery

Answer 21

Runs rostrally along the anterior surface of the pons, bifurcates to form posterior cerebral aa.

Question 22

Anterior inferior cerebellar aa.

Answer 22

Supply the cerebellum and lateral part of the caudal pons

Question 23

Superior cerebellar aa.

Answer 23

Supply the cerebeullum, lateral part of middle pons, and pineal gland

Question 24

Short and long pontine aa.

Answer 24

Supply the pons

Question 25

Labyrinthine/Internal auditory aa.

Answer 25

Supply the inner ear

Question 26

Supplied by Posterior Cerebral Aa.

Answer 26

Midbrain, medial and inf. surfaces of the temporal and occipital lobes including the visual areas of the cerebral cortexs
Thalamus and globus pallidus (via penetrating branches)

Question 27

PCA Infarct

Answer 27

Visual field defects (occipital lobe)

Contralateral hemiparesis or contralateral hemianesthesia (thalamus, internal capsule are affected)