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Posterior lobe of cerebellum

Pineal

Hippocampus

Choroid plexus of lateral ventride

Lateral ventride, central part

Caudate nudeus, body

Insula

Internal cerebral veins

Cerebral

aqueduct

Anterior lobe of cerebellum

iCiomboid

fossa

Choroid plexus offourth ventricle

mmm JIH

lt«cear smallerthan in previous sections, and morę ■jjBHSseen.This piane passesthrough part ofthece-IhEJńcr-!boki fossa, which forms the floor of the fourth ■stóć in the dorsal part of the brainstem (see D and HbbI piąte (lamina tecti) is also visib!e. Its smaller kortiajlaiiy well displayed in this section, while the aanur: prominent in the next section (see A, p. 300). visible because of its somewhat morę occipi-

Cerebellar

tonsil

tal location (see D); a fuli cross-section can be seen in A, p.300. The present section shows the division of the paired fornix tract into its two crura (see also D, p. 295). The hippocampus here borders on the inferior horn of the lateral ventricle on each side, bulging into its floor from the medial side (see also the previous sections and E). The hippocampus is an important component of the limbie system and is one of the first structures to undergo detectable morphological changes in Alzheimer’s disease.

Pineal

Quadrigeminal piąte

Rhomboid

fossa

- through the rhombencephalon, Łi*: diencephalon

Crus

offomix

Mammillary

body

Corpus

callosum

Occipital horn

Pes (foot) of hippocampus

Temporal

horn

E Hippocampal formation Left lateral view.