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* = Calcarine fissure
0 = Splenium of corpus callosum; body of fornix
+ = Interthalamic connection; ant. column of fornix 0
= Fimbria of hippocampus; mamillothalamic tract
Figure 1-4. Medial surface of the brain showing the principal gyri and sulci. Parts of the thalamus and hypothal-
amus have been removed to show the fimbria and anterior column of the fornix and the mamillothalamic tract.
(Reprinted with permission from Truex RC, Kellner CE: Detailed Atlas of the Head and Neck. New York, Oxford
University Press, 1958, p 49.)
-contains two structures:
-lies between the parieto-occipital sulcus and the calcarine
sulcus. -contains the visual cortex (areas 17, 18,
(2) Lingual gyrus (medial occipitotemporal gyrus)
-lies below the calcarine sulcus.
-contains the visual cortex (areas 17, 18, and 19).
e. Insular lobe (insula) [see Figure 1-2]
-lies buried within the lateral sulcus.
-has short and long gyri.
f. Limbic lobe (see Figures 1-4 and 23-IB)
-is a C-shaped structure of the medial hemispheric surface that
encircles the corpus callosum and the lateral aspect of the mid-
—includes the following structures: (1)
Paraterminal gyrus and subcallosal area
-are located anterior to the lamina terminalis and ventral to
the rostrum of the corpus callosum.
Directions: Each of the numbered items or incomplete statements in this section is followed
by answers or by completions of the statement. Select the ONE lettered answer or completion
that is BEST in each case.
1. The thalamus, hypothalamus, and sub-
thalamus are perfused by the
(A) anterior choroidal artery
(B) medial striate artery
(C) anterior communicating artery
(D) posterior communicating artery
(E) anterior cerebral artery
Directions: Each of the numbered items or incomplete statements in this section is negatively
phrased, as indicated by a capitalized word such as NOT, LEAST, or EXCEPT. Select the ONE
lettered answer or completion that is BEST in each case.
2. The optic chiasm is supplied by all of the 6. The cavernous sinus and its lateral wall
following arteries EXCEPT the contain all of the following structures EXCEPT
(A) internal carotid artery
(B) anterior communicating artery (A) carotid siphon