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Fourth ventricle

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Lectures of neuroanatomy by Dr. Noura El Tahawy

Lectures of neuroanatomy by Dr. Noura El Tahawy

Published in Health & Medicine
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  • 1. Fourth ventricle By Dr. Noura El Tahawy
  • 2. Sagittal section of the brainstem & cerebellum The diagram showing the position of the fourth ventricle. Cerebrospinal fluid descends along the aqueduct into the fourth ventricle and emerges into the subarachnoid space via three apertures including the median aperture containing the arrow.
  • 3. Sagittal hemisection of the brain Sagittal hemisection of the brain to show the third and fourth ventricles. Pia mater: red; ependyma: blue.
  • 4. Fourth ventricle Central canal →fourth ventricle →mesencephalic aqueduct→third ventricle Position Situated ventral to cerebellum, and dorsal to pons and cranial half of medulla
  • 5. MRI scan of head in sagittal plane.
  • 6. Projection of the ventricles onto the left surface of the brain.
  • 7. Boundaries & floor of 4 th ventricle
  • 8. Posterior view of the brainstem.
  • 9. Fourth ventricle Boundaries Inferolateral: gracile and cuneate tubercles, inferior cerebellar peduncles Superolateral: superior cerebellar peduncle Lateral recess
  • 10. Floor of the Fourth ventricle Pontine part Median sulcus Vestibular area Sulcus limitans Medial eminence - Facial colliculus: overlies nucleus of abducent n. and genu of facial nerve - Hypoglossal triangle •Striae medullares Vestibular area overlies vestibular nuclei Acoustic tubercle overlying dorsal cochlear nucleus Inferior fovea (Vagal triangle)
  • 11. Floor of the Fourth ventricle Medullary part -Inferior fovea 1- Hypoglossal triangle: overlying hypoglossal nucleus 2-Vestibular triagle 3- Vagal triangle: overlies dorsal nucleus of vagus nerve
  • 12. Roof of 4 th Ventricle
  • 13. Fourth ventricle Roof Rostral part: -superior cerebellar peduncle and superior - medullary velum Caudal part: -inferior medullary velum and choroid plexus of fourth ventricle Three apertures Median aperture (F. of Magendi) Two lateral apertures (foramina of Luschka)
  • 14. Recesses of 4th Ventricle
  • 15. Tela choroidea and choroid plexus
  • 16. The arrangement of tissues forming the choroid plexus.
  • 17. CSF The cerebral ventricular system and its relationship with the subarachnoid space .The circulation of cerebrospinal fluid is indicated by arrows .
  • 18. Transverse section through the superior sagittal sinus showing arachnoid villi .
  • 19. Superior aspect of the cerebral hemispheres showing arachnoid granulations on the right side .On the left side, the arachnoid mater has been removed .
  • 20. Thanks You can download this lecture from: http://www.slideshare.net/drnosman