3D Models Related Images

Frontotemporal (Pterional) Craniotomy Used to Expose Aneurysms on the Circle of Willis M-R

Surgical Correlation


M, The exposure is redirected to the area above the carotid bifurcation. N, The carotid bifurcation has been depressed and the optic tract elevated to expose the basilar bifurcation. A thalamoperforating artery arises from the basilar bifurcation. O, The posterior communicating artery passes in front of the basilar bifurcation. Gently depressing or elevating the posterior communicating artery, which crosses in front of the basilar artery, will increase access to the basilar apex. P, The posterior communicating artery has been elevated to expose the origin of the superior cerebellar arteries and the basilar bifurcation. Q, This oculomotor nerve arises from the medial surface of the cerebral peduncle and passes between the posterior cerebral and superior cerebellar artery to enter the roof of the cavernous sinus. R, The posterior communicating artery has been elevated to expose the basilar apex, both oculomotor nerves, and the junction of the right posterior communicating artery with the right posterior cerebral artery. (Images courtesy of AL Rhoton, Jr.)

You are leaving the Neurosurgical Atlas

Full 3D Models are available outside the Neurosurgical Atlas through an Atlas Meditech subscription.

You can make a difference: donate now. The Neurosurgical Atlas depends almost entirely on your donations: donate now.