Ventricular system of the brain and its relation

Brief overview of the Ventricles

1. Ventricles 360°. 29-8-2015

2. For Other powerpoint presentatioins of “ Skull base 360° ” I will update continuosly with date tag at the end as I am getting more & more information click www.skullbase360.in   - you have to login to   slideshare.net  with Facebook account after clicking   www.skullbase360.in

3. Great teachers – All this is their work . I am just the reader of their books . Prof. Paolo castelnuovo Prof. Aldo Stamm Prof. Mario Sanna Prof. Magnan

4. 3 rd ventricle

5. 3 rd ventricle entered through 1. Supra optic chiasmic route – by Lamina terminalis 2. Infra optic chiasmic route – by Tuber cinerereum

6. Infra optic chiasmic route – by Tuber cinerereum

7. 3 rd ventricle entry through Tuber cinereum is laterally limited by Pcoms Endoscopic third ventricle from posteriorly -- a. Infundibular recess b. tuber cinereum c. mammillary bodies left posterior communicating artery (a), mammillary body (b), and right posterior hypoplasic communicating artery (c) ---measurement performed between the posterior communicating arteries using Geogebra software (a-b = 11.3 mm),

8. 3 rd ventricle entry by - Supra optic chiasmic route – by Lamina terminalis

9. 3 rd ventricle entry through lamina terminalis is laterally limited by A1s & above by Acom Opening the lamina terminalis below the AcomA allows entrance into the anterior part of the third ventricle. A2 usually ascends, in front of the lamina terminalis , to pass into the longitudinal fi ssure between the cerebral hemispheres

10. Note LAMINA TERMINALIS IN PTERIONAL APPROACH

11. Optic chiasma – infundibulum – Mamillary bodies

12. AcomA anterior communicating artery, CP choroid plexus, HT hypothalamus, MB mammillary bodies, MI massa intermedia , OC optic chiasm, PC posterior commissure, T thalamus, ThV fl floor of the third ventricle, white asterisk opening of the Sylvius aqueduct, red arrow front door to the third ventricle The anterior wall of the third ventricle is given by the lamina terminalis . The roof of this ventricle is given by the tela choroidea , which presents paired choroid plexuses.

13. Lateral ventricle

14. Analogy Entry of lateral ventricle from 3 rd ventricle through Foramen of Monro which is present laterally Entry of maxillary sinus from nose through maxillary osteum which is present laterally

15. CC corpus callosum, CP choroid plexus, MI massa intermedia , PC posterior commissure, T thalamus , ThV fl floor of the third ventricle, yellow arrow opening of the Silvius aqueduct, red asterisk suprapineal recess, white asterisk ( left ) lateral ventricle, white circles foramen of Monro Lateral ventricles are located in the cerebral hemispheres. They communicate with the third ventricle by the foramen of Monro.

16. FM – Foramen of Monro

17. FM – Foramen of Monro

18. yellow arrow opening of the Silvius aqueduct

19. 0 degree endoscope . The endoscope is inserted into the third ventricle behind the pituitary stalk and from the left side. The posterior part of the ventricular cavity is explored . - - From Atlas of Endoscopic Anatomy for Endonasal lntracranial Surgery ; Paolo Cappabianca

20. 00 endoscope. The endoscope is approached closer to the pineal recess .

21. 30° endoscope. The endoscope is turned to the right side.

22. 30° endoscope. The endoscope is orientated upwards and approached closer to the pineal recess. Closer view.

23. Endoscopic Third Ventriculostomy ( ETV) in treatment of Hydrocephalus http:// drvksgautam.blogspot.in/2014/01/role-endoscopic-third-ventriculostomy.html Endoscope is passed from right lateral ventricle to third ventricle through Foramen of Monro

24. Intraoperative Endoscopic view of the structures at the Foramen of Monro

25. Diagrammatic depiction of the anatomical structures which are to be identified by the neurosurgeon

26. The space between a & oc is Lamina terminalis Neuroendoscopic view of the third ventricle floor - ---- Infundibular recess ( i ), optic chiasm ( oc ) and a prominent anterior commissure ( a ) are seen anterior to the opaque and narrow tuber cinereum ( t ).  B Neuroendoscopic view of the third ventricle floor in another myelomeningocele patient. A non-transparent tuber cinereum ( t ) and a dilated infundibular recess ( i ) are seen anterior to the mamillary bodies ( m ). Note to the vascular structure of the third ventricle floor.  c Neuroendoscopic view showing a steep third ventricle floor in a myelomeningocele patient. A narrow tuber cinereum ( t ) is visible just anterior to the mamillary bodies ( m ).  d Neuroendoscopic view through a very narrow prepontine cistern. Note the close proximity of the basillary artery ( ba ) and clivus ( cl )

27. Endoscopic third ventricle from posteriorly -- a. Infundibular recess b. tuber cinereum c. mammillary bodies From front – through lamina terminalis

28. Tuber cinereum is laterally limited by Pcoms Endoscopic third ventricle from posteriorly -- a. Infundibular recess b. tuber cinereum c. mammillary bodies left posterior communicating artery (a), mammillary body (b), and right posterior hypoplasic communicating artery (c) ---measurement performed between the posterior communicating arteries using Geogebra software (a-b = 11.3 mm),

29. In the descriptive analysis of the 20 specimens, the PCoAs distance was 9 to 18.9 mm, mean of 12.5 mm, median of 12.2 mm, standard deviation of 2.3 mm.

30. See the basilar artery, PCA,SCA ..... through ETV [Endoscopic Third Ventriculostomy ]

31. Great teachers – All this is their work . I am just the reader of their books . Prof. Paolo castelnuovo Prof. Aldo Stamm Prof. Mario Sanna Prof. Magnan

32. For Other powerpoint presentatioins of “ Skull base 360° ” I will update continuosly with date tag at the end as I am getting more & more information click www.skullbase360.in   - you have to login to   slideshare.net  with Facebook account after clicking   www.skullbase360.in