1. Cerebral hemisphere Diencephalon Cerebellum Brain stem • Midbrain
• Pons
• Medulla oblongata
Figure 12.3d

2. Cerebral hemisphere
Septum pellucidum
Corpus callosum
Interthalamic
adhesion
(intermediate
mass of
thalamus)
Fornix
Choroid plexus
Thalamus
(encloses third
ventricle)
Interven-
tricular
foramen
Posterior commissure
Pineal gland
(part of epithalamus)
Anterior
commissure
Corpora
quadrigemina
Mid-
brain
Hypothalamus
Cerebral
aqueduct
Optic chiasma
Arbor vitae (of
cerebellum)
Pituitary gland and stalk (nfundibulum)
Fourth ventricle
Mammillary body
Choroid plexus
Pons
Cerebellum
Medulla oblongata
Spinal cord

3. Lateral ventricle
Septum pellucidum
Anterior horn
Posterior
horn
Inferior
horn
Interventricular
foramen
Lateral
aperture
Median
aperture
Third ventricle
Inferior horn
Lateral
aperture
Cerebral aqueduct
Fourth ventricle
Central canal
(a) Anterior view
(b) Left lateral view

4. Frontal lobe
Olfactory bulb and tracts
(synapse point of c.n. I)
Optic chiasma
Optic nerve (c.n. II)
Optic tract
Mammillary body
Midbrain
Pons
Temporal lobe
Medulla
oblongata
Cerebellum
Spinal cord