ICA

ICA Supraclinoid branches: OPAAM (opthalmic, Pcomm, anterior choroidal, ACA, MCA)
Segment
Borderes
Branches
NOTES
C7
Comm-unicating
ends at ICA bifurc.
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C6
Ophth-almic
starts at distal
distal dural ring
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First true intra-dural branch so can cause SAH
C5
Clinoid
ends at distal dural ring
None
C4
Cavernous
petrolingual ligament to proximal dural ring
1) meningohypophyseal trunk (MHT):
* marginal tentorial artery A. (Italian Artery)
* inferior hypophyseal A (IHA)
* dorsal meningeal A.
2) Infero-lateral trunk:
3) Capsular arteries of McConnell: pituitary gland
- tentorial meningiomas and AVMs supplied by Italian artery
C3
Lacerum
lacerum to petrolingual ligament
Inconsistent and hard to see on DSA
C2
Petrous (Intraosseous)
petrous apex to foramen lacerum
OFTEN NONE
1) Caroticotympanic artery
2) Vidian artery (usually ECA branch)
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C1
Cervical
cervical to petrous bone
NONE
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Anterior Choroidal Artery

  • supplies posterior limb of IC, optic tract/LGN, GPi, medial temporal lobe
  • Cistern enclosing: crural cistern
contralateral hemiplegia, hemi-anesthesia, homonymous hemianopsia
AChA supplying a tumor
AChA supplying a tumor

MHT

Marginal tentorial artery

  • supplies meninges of tentorium and often CN3, 4, 6 nerves
  • small and often NOT visualized on DSA in absence of pathological flow
notion image