8:5- Blood Supply of the Head and Neck

what do the right and left common carotid arteries divide into?

internal (brain) and external (face/neck) carotid arteries

vertebral arteries

ascend from the subclavian artery in the transverse foramina of cervical vertebra before entering the cranium to supply the brain

facial artery

supplies superficial face after arching over mandible

maxillary artery

supplies deep face passing behind the mandible

superficial temporal artery

supplies lateral aspect of the head and passes anterior to the external auditory meatus

what does the internal carotid artery divide into?

anterior and middle cerebral arteries

what does anterior cerebral artery supply?

anterior medial parts of the cerebrum

what does middle cerebral artery supply?

lateral aspects of the cerebrum

what do the right and left vertebral arteries fuse to become?

the basilar artery

what does the basilar artery bifurcate into?

right and left posterior cerebral arteries

circle of willis

a hexagonal ring of arteries at the base of the brain that acts as a safety mechanism, ensuring blood supply to the brain even if one vessel is blocked

anterior spinal artery

a critical longitudinal vessel supplying the anterior two-thirds of the spinal cord

posterior spinal arteries

typically from posterior inferior cerebellar artery, or vertebral

where do veins of the brain drain into?

dural venous sinuses

inferior sagittal sinus drains into what?

confluence of sinuses via the straight sinus

superior sagittal sinus

drains direclty to the confluence of sinuses

what does the confluence drain into?

right and left transverse sinuses to the sigmoid sinuses

what does the sigmoid sinus drain into?

internal jugular vein at the jugular foramen