S2-T6 Blood Dupply and Venous Drainage of the Brain and Spinal Cord

common carotid arteries

arteries (bilateral) that supplies the anterior circulation of the brain

vertebral arteries

arteries (bilateral) that supplies the posterior circulation of the brain

subarachnoid space

the 4 arteries lie within the _______________

internal carotid artery

• begins at the bifurcation of the common carotid artery

• usually possesses a localized dilation, called carotid sinus

• perforates the base of the skull by passing through the carotid canal of the temporal bone

• courses horizontally forward through the cavernous sinus

• emerges on the medial side of the anterior clinoid process by perforating the dura matter

• enters the subarachnoid space by piercing the arachnoid matter and turned posteriorly to the region of the medial end of the lateral cerebral sulcus

  • then, it divides into the anterior and middle cerebral arteries

common carotid artery

the internal carotid artery begins at the bifurcation of the ________________

carotid sinus

the internal carotid artery usually possesses a localized dilation, called _______________

carotid canal

the internal carotid artery perforates the base of the skull by passing through the ___________ of the temporal bone

cavernous sinus

the internal carotid canal courses horizontally forward through the __________

anterior clinoid process

emerges on the medial side of the _____________ by perforating the dura matter

lateral cerebral sulcus

the internal carotid artery enters the subarachnoid space by piercing the arachnoid matter and turned posteriorly to the region of the medial end of the _______________

anterior and middle cerebral arteries

the internal carotid artery divides into the _____________________

internal carotid artery

where does the anterior and middle cerebral arteries arises from

Oh CAMP

1. ophthalmic artery

2. choroidal artery

3. anterior cerebral artery

4. middle cerebral artery

5. posterior communicating artey

branches of the internal carotid artery

ophthalmic artery

• arises as the internal carotid artery emerges from the cavernous sinus

  • enters the orbit through the optic canal below and lateral to the optic nerve

ophthalmic artery

supplies:

• Eye

• Scalp

• Ethmoid and Frontal Sinuses

• Dorsum of the nose

choroidal artery

• arises from the terminal bifurcation of the internal carotid artery (similar to posterior cerebral artery)

• passes posteriorly close to the optic tract, enters the inferior horn of the lateral ventricle, and ends in the choroid plexus

choroidal artery

produces CSF

anterior cerebral artery

smaller terminal branch of the internal carotid artery

anterior cerebral artery

runs forward and medially superior to the optic nerve and enters the longitudinal fissure of the cerebrum

anterior communicating artery

the left and right anterior cerebral artery are joined together by the ______________________

1. precommunicating part (A1)

2. infracallosal segment (A2)

3. precallosal part (A3)

4. supracallosal part (A4)

5. postcallosal part (A5)

segments of the anterior cerebral artery

1. Anteromedial central arteries

2. Anterior communicatinga rteries

branches in the precommunicating part (A1) of the anterior cerebral artery

1. Orbitofrontal branches

2. Frontopolar artery

3. Long striate/central artery (of Heubner)

4. Perforating branches (to hypothalamus, septum pellucidum, anterior commissure, fornix, stratum, corpus callosum)

branches in the infracallosal segment (A2) of the anterior cerebral artery

1. Pericallosal artery

2. Callosomarginal artery

3. Medial frontal branches

4. Cingular branch

branches in the precallosal part (A3) of the anterior cerebral artery

1. Paracentral branches

2. Precuneate branches

branches in the supracallosal part (A4) of the anterior cerebral artery

1. Parietal branches

2. Pariet-occipital branches

3. Inferior callosal branches

branches in the postcallosal part (A5) of the anterior cerebral artery

medial striate artery (recurrent artery of Heubner)

supplies:

• caudate nucleus

• putamen

  • internal capsule

orbital artery

supplies:

• orbital surface of the frontal lobe

• medial surface of the frontal lobe

callosomarginal artery

supplies:

• paracentral lobule

  • cingulate gyrus

pericallosal artery (terminal branch of the anterior cerebral artery)

supplies:

• medial surface of the parietal lobe

• precuneus