Cerebrovascular Arteries Origin and Termination

Right Common Carotid Origin

Innominate/ brachiocephalic artery

Right Common Carotid Supplies

ICA and ECA

Right Common Carotid Terminates

ICA and ECA

Left Common Carotid Origin

Aortic Arch

Left Common Carotid Supplies

ICA and ECA

Left Common Carotid Terminates

ICA and ECA

Internal Carotid Artery Origin

Internal Carotid Artery Supplies

Eyes and front, top, and sides of cerebral hemisphere

ICA Location

Posterolateral to ECA Proximally

Internal Carotid Artery Terminates

Bifurcation into MCA and ACA

External Carotid Artery Origin

CCA Bifurcation

External Carotid Artery Supplies

Face, neck, and scalp

ECA Location

Anteromedial to ICA Proximally

External Carotid Artery Terminates

Superficial Temporal Artery

Branches of ECA

1st- Superior Thyroid Artery

-Lingual Artery

-Ascending Pharyngeal Artery

-Occipital Artery

-Facial Artery

-Posterior Auricular Artery

-Internal Maxillary Artery

8th- Superficial Temporal Artery

Segments of the ICA

-Cervical Segment

-Petrous Segment

-Cavernous Segment

-Supraclinoid Segment

ICA Segment: Cervical Origin

Carotid bifurcation

ICA Segment: Cervical Termination

Entrance of carotid canal

ICA Segment: Petrous Origin

Carotid canal

ICA Segment: Petrous Supplies

Tympanic artery branch

ICA Segment: Petrous Terminates

Floor of cavernous Sinus

ICA Segment: Cavernous Origin

Floor of Cavernous Sinus

ICA Segment: Cavernous Info

Tortuous/ S- shaped

Carotid siphon

ICA Segment: Cavernous Termination

Roof of cavernous sinus

ICA Segment: Cavernous Branch

Opthalmic Artery

Opthalmic Artery Origin

Cavernous branch of ICA

Opthalmic Artery Terminal Branches

Supratrochlear (Frontal)

Nasal Artery

Supraorbital Artery

Opthalmic Artery Other branches

Laychrymal

Anterior and Posterior Ethmodial

Supraorbital and Frontal Arteries

Anastomosis with Superficial Temporal Artery (STA)

Nasal Artery

Anastomosis with Facial Artery to form Angular Artery

ICA Segment: Supraclinoid Origin

Roof of cavernous sinus

ICA Segment: Supraclinoid Termination

ICA bifurcation

Middle Cerebral Artery (MCA) Origin

ICA bifurcation

Middle Cerebral Artery (MCA) Supplies

lateral surface of cerebrum

Middle Cerebral Artery (MCA) Terminates

M1: origin to trifurcation

M2: trifurcation to distally

Anterior Cerebral Artery (ACA) Origin

ICA bifurcation

Anterior Cerebral Artery (ACA) Supplies

Medial surface of brain

Anterior Cerebral Artery (ACA) Terminates

A1: Origin to Anterior Communicating Artery (ACoA)

A2: From AcoA distally

Vertebral Artery Origin

1st branch of subclavian

Vertebral Artery Supplies

Brainstem, Cerebellum, Back and undersurface of cerebral hemisphere

Vertebral Artery Segments

Prevertebral Segment

Cervical Segment

Horizontal Segment (Atlantic)

Intracranial Segment

Vertebral Artery Termination

forms Basilar Artery with opposite Vertebral artery

Basilar Artery Origin

R and L vertebral arteries unite

Basilar Artery Supplies

Posterior structures of brain

Basilar Artery Terminates

Divides into Posterior Cerebral Arteries (PCA)

Posterior Cerebral Artery Origin

Basilar bifurcation

Posterior Cerebral Artery Supplies

Posterior Occipital and temporal lobes of cerebrum

Posterior Cerebral Artery Terminates

P1: Origin to PCoA

P2: Starts at PCoA and Distally

Circle of Willis

Connects anterior and posterior circulation

Intraarterial Connections

Left ACA- ACoA- Right ACA

PCA- PCoA-MCA/ACA bifurcation