1. The Brain 06
Laboratory Exercise

2. Objectives
Recognize the medulla, pons, cerebellum, midbrain, diencephalon, and cerebral hemispheres
Recognize the corpus callosum, fornix, septum, rostral commissure, hypophysis, ventricles
Recognize the stumps of the cranial nerves
Recognize the cerebellum and its vermis and hemispheres
Recognize the rostral colliculi, caudal colliculi, and mesencephalic aqueduct
Recognize the medial and lateral geniculate bodies, optic nerves, chiasm and tracts, mamillary bodies, epiphysis (pineal)
Recognize canine cruciate sulcus, marginal sulcus, precruciate, postcruciate, marginal and ectosylvian gyri.

3. Cerebrum
Longitudinal fissure
Sulci and Gyri
Cerebellum
Vermis
Hemispheres
Brain stem
Diencephalon
Mesencephalon
Metencephalon
Myelencephalon

4. Cerebrum (Telencephalon)
Rhinal sulcus
Olfactory bulb
Olfactory peduncle
Piriform lobe

5. Ventral surface Diencephalon Mesencephalon -Optic nerves (II)
-Optic chiasm (25)
-Optic tracts (24)
-Tuber cinereum (8)
-Mammillary bodies (10) 10
III V VI
VII
Mesencephalon
-Crus cerebri
-Oculomotor n (III)

6. -Transverse fibers, pons (13)
Metencephalon
-Transverse fibers, pons (13)
-Trigeminal nerve V
Myelencephalon
-Trapezoid body (18)
-Pyramids (19)
-Abducent nerve VI
-Facial nerve VII
-Vestibulocochlear nerve VIII
-Decussation of the pyramids
-Hypoglossal nerve XII
III IV V VI V

7. Dorsal surface Metencephalon, Myelencephalon10 12
Cerebellar peduncles rostral (12)
middle (10)
caudal (11)
Trochlear nerve IV
Dorsal surface Metencephalon, Myelencephalon

8. Median sulcus Sulcus limitans Obex Trigeminal nerve V
Fasciculus cuneatus
Spinal tract, V
Trigeminal nerve V

9. Ventricles Corpus callosum Fornix Pineal Fourth ventricle
Interthalamic adhesion (33)
Tectum
Rostral commissure (37)
Mesencephalic aqueduct
Hypothalamus (32)

10. Dorsal surface, Diencephalon & Mesencephalon
Pineal
Lateral geniculate (4)
Caudal colliculus(8)
Medial geniculate(5)
Rostral colliculus(6)

11. Neocortex of the dog Rhinal sulcus Pseudosylvian sulcus Sylvian gyri
Ectosylvian sulcus
Ectosylvian gyrus
-Middle (Auditory) 7’
Cruciate sulcus
Precruciate gyrus
Postcruciate gyrus
Marginal sulcus 16
Marginal gyrus (Visual)