Notes summarising the brain anatomy, functions and associated blood supply of the brain, which is a component of Head & Neck anatomy in dentistry. I wrote these notes myself when I was studying for my own exam and my notes helped me get a first (A) in my exam!
Vertebral artery originates from brachiocephalic artery coming
from the arch of aorta
3 parts: Cervical; Atlantc; ntercranial
Meningeal layers: Dura mater; Arachnoid mater; Pia mater
Arteries run in subarachnoid space(Periarterial layer supplying
cortex)
Vertebral artery: arises from subclavian; pass through C1-C6.
Foramen magnum; perforate dura and arachnoid
At caudal border of pons, form basilar, ascend clivus -> pos.
cerebral artery
nternal carotd:
nternal carotd artery enters cranial cavity in petrous part of
temporal
Comes with Venous plexuses and carotd plexus of sympathetc
nerves
nternal carotd:
o Cervical part: afer bifurcaton -> just before entering
o Petrous part: Middle cranial fossa; Carotd canal beside
dorsum sellae
o Cavernous part: horizontal in cavernous sinus
o Cerebral part: emerges medial to ant. Clinoid process;
enters subachnoid space
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