Bassett Collection of Stereoscopic Images of Human Anatomy

Exploration of the brain from the medial aspect

Column of fornix, mammillothalamic tract and fasciculus retroflexus

Image #16-2

KEYWORDS: Brain, Diencephalon, Telencephalon.

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Higher resolution images are available for a fee. Contact Drew Bourn, PhD, MLIS.

Exploration of the brain from the medial aspect
Column of fornix, mammillothalamic tract and fasciculus retroflexus
Dissection of the medial wall of the thalamus and hypothalamus has now exposed the entire column of the fornix, the mammillothalamic tract and the fasciculus retroflexus. Some gray matter partially covers the latter tract. The internal course of several of the posterior perforating arteries can be followed in the dissected area. Within the meninges filling the transverse fissure a choroidal branch of the posterior cerebral artery is visible.
1 . Fornix (body)
2 . Choroid plexus third ventricle (note the continuation of this plexus through the interventricular foramen)
3 . Interventricular foramen (of Monro)
4 . Mamillothalamic tract
5 . Anterior commissure (cut across)
6 . Lamina terminalis
7 . Subcallosal gyrus
8 . Tectal part of column of formix
9 . Mamillary body
10 . Optic recess
11 . Infundibular recess and tuber cinereum
12 . Optic chiasm
13 . Posterior communicating artery
14 . Stria medullaris thalami
15 . Pineal body
16 . Habenula
17 . Posterior commissure (cut across)
18 . Quadrigeminal plate
19 . Opening of cerebral aqueduct
20 . Cerebral aqueduct
21 . Fasciculus retroflexus
22 . Filaments of oculomotor nerve within tegmentum
23 . Substantia nigra
24 . Oculomotor nerve (III)
25 . Posterior recess of interpeduncular fossa
26 . Posterior cerebral artery right
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