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Vascular Anatomy

6 Docs

Arterial Supply

Last Updated: April 1, 2025

    Major blood vessels of the Brain Internal carotid     4 big segments: o    Cervical o    Intrapetrosal o    Intracavernous o   Supraclinoid Ophthalmic (first branch) Retina Anterior Choroidal Optic tract – internal capsule (post limb) – cerebral peduncle Globus pallidus – LGB – hippocampus – amygdala – Thalamocortical pathway (would cause neglect) Posterior Communicating...

Internal Carotid Artery

Last Updated: April 1, 2025

Branches   Internal Carotid Artery Segments Branches    C1 Cervical None   C2 Petrous Vidian Caroticotympanic Anastomose with Vidian branch of Internal maxillary of ECA Anastomose with Inferior tympanic branch of ECA Both get enlarged in cases of aberrant ICA(congenital absence of C1 of ICA, ECA > Caroticotympanic/Vidian > C2 of ICA) C3 Lacerum None...

External Carotid Artery

Last Updated: April 1, 2025

Branches External Carotid Artery Branches Intracranial Supply Superior thyroid None Ascending Pharyngeal Neuromeningeal branch  dura and lower cranial nerves Lingual   Facial Angular branch  anastomosis with ophthalmic artery branches   Occipital Anastomosis with vertebral artery segmental branches Superficial temporal   Internal Maxillary Middle meningeal artery  foramen spinosum  supplies dura  (anastomose with...

Anterior Cerebral Artery

Last Updated: April 1, 2025

Anterior Cerebral Artery Branches ACA Segments Location Branches A1 Pre-communicating  Lenticulostriate, recurrent artery of Huebner A2 From Acom to  callosomarginal  Orbitofrontal, frontopolar, A3 Continuation as pericallosal artery after callosomarginal origin  Callosomarginal  Continues as pericallosal A4 Small cortical branches     Variants Variant Description A1 segment hypoplasia Both A2 segment arise from one side – in...

Posterior Cerebral Artery

Last Updated: April 1, 2025

Branches Posterior Cerebral Artery Location Branches P1 Before PCOM origin PCOM  anterior thalamoperforator (Tuberothalamic a) Posterior thalamoperforator   P2 After PCOM origin    P2A: while in the crural cistern    P2P: after bridging to ambient cistern Middle posterior choroidal artery Lateral posterior choroidal artery Thalamogeniculate   P3 Quadrigeminal cistern   P4 Cortical branches Anterior...

VertebroBasilar Arteries

Last Updated: April 1, 2025

Basilar Artery Branches Basilar Artery Branches   Paramedian Supply medial third of pons, midbrain Short circumferential Supply lateral 2/3 of pons, midbrain AICA Anteroinferior cerebellum, floccular nodule, middle cerebellar peduncle, cranial nerves VII, VIII SCA Superior cerebellum  Interpeduncular Supplies high midbrain and subthalamic   Vertebral Artery Branches Vertebral Artery Branches   Anterior Spinal Supplies spinal...