Giải phẫu động mạch não trên lều

BS. Trịnh Minh Tùng

ICA

• C1: cervical

• C2: petrous

• C3: lacerum

• C4: cavernous

• C5: clinoid

• C6: Ophthalmic

• C7: Communicating

• C1: Cervical: Common Carotid Artery Bifurcation – Carotid canal of Petrous bone

• C2: Carotid canal of Petrous bone- inferior edge of foramen lacerum

C3

• C3: foramen lacerum- petrolingual ligament

• C4: petrolingual ligament- proximal dural ring

• C5: proximal dural ring – distal dural ring

• C6:distal dural ring - proximal pcomm origin

• C7: proximal pcomm origin- Bifurcation

Differentiating Pcomm from Ach

• Proximal

• Larger

• Goes up or down a little- Straight back

• Ach: superior hump

ACA

• A1: origin – acomm• A2: acomm-

callosalmarginal a.• A3:callosalmarginal a.

– 3cm posterior to genu

• A4: pericallosal a• A5: terminal branch

ACA branches

• Recurrent a.• Frontal polar a.• Medial

Frontalorbital a.• Callosomarginal• Pericallosal

MCA

• M1: ICA bifurcation – MCA bifurcation

• M2: MCA bifurcation -emergence from Sylvian fissure

• M3,4: distal branches

• M5: terminal branch

• Anterior temporal• Posterior temporal• Lateral Orbitalfrontal• Ascending Frontal• PreRolandic• Rolandic• Anterior parietal• Posterior Parietal• Angular• Lateral

lenticulostriate

PCA

• P1: origin – pcomm origin• P2: pcomm origin- inf

temporal origin• P3: inf temporal origin-

origin of terminal branches

• P4: segment after origin of parieto-occipital calcarine a

• P1: origin – pcomm origin• P2: pcomm origin- inf

temporal origin• P3: inf temporal origin-

origin of terminal branches

• P4: segment after origin of parieto-occipital calcarine a

Circle of Willis

Artery distribution