Chapter 18. Vascular Neurosurgery
Which of the following is branch of the meningohypophyseal trunk (MHT)?
B. Caroticotympanic artery
C. Inferior hypophyseal artery
D. Superior hypophyseal artery
E. Recurrent artery of Heubner
C. The inferior hypophyseal artery arises as 1 of 3 branches of the meningohypophyseal trunk. The other 2 are the tentorial artery and dorsal meningeal. Choices A and B both arise from petrous internal carotid artery. Superior hypophyseal arises from the ophthalmic segment of the internal carotid artery. Recurrent artery of Heubner arises from anterior cerebral artery system.
Which of the following segmental anatomic classifications correctly describes the second division of the middle cerebral artery (M2)?
C. The middle cerebral artery (MCA) is divided into 4 segments: sphenoidal, insular, opercular, and terminal/cortical (M1 to M4, respectively). The sphenoidal segment (M1) or horizontal segment has branches that supply the basal ganglia. The insular segment (M2) runs within the insula. The opercular segment (M3) extends laterally from the insula toward the cortex. The terminal segment (M4) begins at the external Sylvian fissure and extends distally to the cortex of the brain.
Reproduced with permission from Ropper AH, Samuel MA, Klein JP. Adams and Victor’s Principles of Neurology, 10e. New York, NY: McGraw-Hill, 2014.
The blood supply to the cuneate and lingual gyri is provided by which artery?
A. Anterior temporal artery
B. Inferior temporal artery
C. Medial posterior choroidal artery
D. Parieto-occipital artery
E. The cuneate and lingual gyri are portions of the occipital lobe, which are divided by the calcarine sulcus. These 2 gyri compose the primary visual cortex. The calcarine artery supplies this region of the brain. The anterior temporal artery typically branches from the M1 segment of the MCA and supplies the anterior third of the temporal gyri. The inferior temporal artery is typically a terminal branch off the posterior cerebral artery (PCA) via the lateral occipital artery. The medial posterior choroidal artery is a branch off the PCA second segment and supplies the midbrain, posterior ...