The document describes the ventricular system of the brain, including: 1) It is comprised of the lateral ventricles, third ventricle, cerebral aqueduct, and fourth ventricle. 2) Cerebrospinal fluid is produced by the choroid plexus and circulates through the ventricles before being reabsorbed into the venous sinuses. 3) The lateral ventricles are located within the cerebral hemispheres and have anterior, body, and posterior horns.

1. Ventricular system of brain Dr. Syed Imad FCPS, MRCS

4. Neural tube

5. VENTRICULAR SYSTEM

7. VENTRICULAR SYSTEM from the right from above Central canal

11. External CSF circulation Internal CSF circulation Interventricular foramen 3rd Ventricle Choroid plexus Venous Sinus Lateral ventricle Subarachnoid space

12. Subarachnoid space and cisterns

18. CSF Flow

19. MENINGES & SPACES

23. Dural venous sinuses

24. Lateral ventricles

25. Central canal

32. Thalamus and Basal ganglia Brain stem

33. Thalamus Thalamus and Basal ganglia Brain stem

34. Amygdaloid body Thalamus Tail of Caudate nucleus Head of Caudate nucleus Lentiform nucleus Body of Caudate nucleus

36. Fibers of Internal capsule Corpus callosum Left thalamus and basal nuclei, viewed from behind

38. Lateral ventricles Cingulate sulcus Posterior horn of lateral ventricle Collateral eminence Collateral sulcus Splenium of corpus callosum Tapetum of corpus callosum Optic radiation Callosal radiation

41. Lateral ventricles Inferior horn -- Largest horn

45. Neural tube

47. Third Ventricle

48. Third Ventricle

50. Tuber cinerum Median eminence Infundibulum Posterior pitutary

51. Third Ventricle

56. Tela choroidea (double fold of pia) Pitutary stalk (solid) Infundibulum (hollow )

58. Fourth ventricle