Midsaggital Section of the Sheep's Brain

1          central canal

2          posterior roof of the fourth ventricle (medial aperture of 4th ventricle)

3          fourth ventricle

4          medulla

5          anterior medullary velum (anterior roof of the fourth ventricle)

6          pons

7          inferior colliculus

8a        cerebral aqueduct

8b        tegmentum

9          tectum

10        pituitary gland

11        posterior commissure

12        mammillary body

13        infundibulum

14        massa intermedia

15        optic chiasm

16        anterior commissure

17        anterior perforated substance

18        medial olfactory gyrus

19a       subcallosal area

19b      septal area

20        gyrus rectus

21        olfactory bulb

22        septum pellucidum

23        rostrum of the corpus callosum

24        anterior cingulate gyrus

25        genu of the corpus callosum

26        body of the fornix

27        cingulate sulcus

28        precentral gyrus

29        cruciate fissure

30        postcentral gyrus

31        cingulate gyrus (or cingulate cortex)

32        Foramen of Monro

33        corpus callosum

34         marginal gyrus

35         hippocampal commissure

36         habenula

37         habenular commissure

38         splenium (of the corpus callosum)

39        pineal body

40        retrosplenial cortex

41        superior colliculus

42        anterior lobe of the cerebellum

43        primary fissure of the cerebellum

44        middle lobe of the cerebellum

45        white center of vermis (in the cerebellum)

46         posterior lobe of the cerebellum

47        spinal cord