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Midbrain Posterior Cerebellar Artery CN 3, 4
*Basilar Artery *Superior Cerebellar Artery
Pons *AICA (Labrynth Artery) *Circumferential Branches CN 5, 6, 7, 8
*Vertebral Artery *PICA
Medulla *Anterior Spinal Artery CN 9, 10, 12
Artery System Artery Name Source of Artery What Does It Supply? Occlusion Causes:
Internal Carotid Artery System - Supplies anterior 2/3 of brain
Travels along the optic nerve
Internal Carotid to supply the eyeball and
Ophthalmic Artery Artery other orbital structures
*Supplies the optic tract
*Some choroid plexus
*Part of the cerebral
peduncle
*Portions of the internal
Anterior Choroidal Internal Carotid capsule
Artery Artery *Thalamus & Hippocampus
*Links the anterior
circulation with the
posterior circulation
Posterior *Joins the Posterior
Communicating Internal Carotid Cerebral Artery with the
Artery Artery internal carotid
*Occlusion causes restricted
Internal Carotid *Supplies the insula contralateral motor and
*Supplies most of Artery *Most of the lateral surface somatosensory deficits to
the precentral **Right Side MCA of the cerebral hemisphere upper limb and face
(motor) and occlusion can cause *Gives rise to Lenticulo *Left hemisphere is involved,
postcentral Middle Cerebral Left Side Hemi- Striate Branches - Supplies language deficits may be
(somatosensory) gyri Artery Neglect Syndrome Internal Capsule apparent
*Medial aspect of the
Frontal & Parietal lobes
*Supplies some of Occlusion causes
precentral (motor) and contralateral motor and
Courses along the Anterior Cerebral Internal Carotid postcentral (somatosensory) somatosensory deficits
longitudinal fissure Artery Artery gyri restricted to the lower limb
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Artery System Artery Name Source of Artery What Does It Supply? Occlusion Causes:
Vertebral - Basilar System - Occulsion to Basilar can cause "Locked in Syndrome"
-Supplies brain stem, cerebellum and posterior 1/3 of brain
- Vertebral arteries arise from subclavian arteries
It usually originates between
Artery of
T9 and T12 (in 75% of cases)
Adamkiewicz aka
and supplies the lower one
artery of the lumbar
third of the cord
enlargement
Posterior Spinal
Artery Vertebral Artery
*Descends in *Supplemented by blood
anterior median from segmental radicular
fissure arteries
*Terminates as Anterior Spinal Artery *Supplies medial Medulla on
caudal equinal way to Spinal cord *Approx. 75% blood to spinal
arteries & sacral cord from ASA
arteries Vertebral Artery *Anterior Chord Syndrome
*Much of the inferior
surface of the cerebellar
Posterior Inferior
hemispheres
Cerebellar Artery
*Lateral medulla
(PICA)
*Choroid plexus of 4th
Vertebral Artery ventricle
Formed by an
anastomosis
between the anterior
and posterior spinal Peripheral portions of the
Arterial Vasocorona arteries lateral funiculi of spinal cord
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Artery System Artery Name Source of Artery What Does It Supply? Occlusion Causes:
Vertebral - Basilar System - Occulsion to Basilar can cause "Locked in Syndrome"
-Supplies brain stem, cerebellum and posterior 1/3 of brain
- Vertebral arteries arise from subclavian arteries
Occlusion affects:
-Middle cerebellar peduncle
-Vestibular nuclei
*Anterior portions of the -Spinal V nucleus & tract
Anterior Inferior inferior surface of the -Spinothalamic tract
Occlusion causes Cerebellar Artery cerebellum -Descending sympathetic
Horner's Syndrome (AICA) Basilar Artery *Lateral Pons fiber
*Superior surface of the
cerebellum Occlusion affects superior
Superior Cerebellar *Most of the caudal cerebellar peduncle &
Artery Basilar Artery midbrain and rostral pons cerebellum
*Supplies the medial & Gives rise to posterior
*Branches to rostral inferior surfaces of the choroidal arteries which
midbrain occipital (supplies visual supply the choroid plexus of
*Caudal Posterior Cerebral cortex) & medial temporal the 3rd and lateral ventricles
diencephalon Arteries Basilar Artery lobes (hippocampus)
Occlusion affects:
-Corticospinal tract
-Facial nucleus
Pontine Paramedian Supply the medial portion of -Abducens nucleus &
Arteries Basilar Artery lower & upper pons pontine gaze center
Occlusion affects:
Long Circumferential *Most of the tegmentum of -Gaze centers
Branches Basilar Artery the rostral & caudal pons -Reticular formation
Occlusion affects:
-Descending sympathetic
Occlusion causes fibers
Horner's Syndrome Short Circumferential Supply an area in -Pontocerebellar fibers
along with AICA Branches Basilar Artery ventrolateral pons -Spinothalamic tract
*Branch of the
anterior inferior
cerebellar artery *Accompanies
(85% cases) vestibulocochlear nerve
*Branch of basilar through internal acoustic
artery (15 % cases) Labyrinthine Artery Basilar Artery meatus
