1 / 15

Meninges, Ventricles, CSF

Meninges, Ventricles, CSF. Human Neurobiology ANHB 2217 Avinash Bharadwaj Semester 1, 2006 Week 2. Meninges. Protective coverings for brain & spinal cord. Meninges. Dura mater Cranial Spinal Arachnoid mater Pia mater. General Features. Dura – tough, fibrous.

winstont
Download Presentation

Meninges, Ventricles, CSF

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Meninges, Ventricles, CSF Human Neurobiology ANHB 2217 Avinash Bharadwaj Semester 1, 2006 Week 2

  2. Meninges • Protective coverings for brain & spinal cord

  3. Meninges • Dura mater • Cranial • Spinal • Arachnoid mater • Pia mater

  4. General Features Dura – tough, fibrous Arachnoid – delicate network Pia mater – soft, thin, delicate

  5. Other Names! • Dura – Pachymeninx – ‘tough’ • Arachnoid (like a spider’s web) + Pia – leptomeninges

  6. Cranial Dura Mater • Bone • Endosteal • Sinus • Meningeal

  7. Folds of Dura • Falx – the sickle • Occupies the longitudinal fissure between cerebral hemispheres • Tentorium – the tent • Covers the cerebellum • The opening accommodates the brainstem

  8. Dural Venous Sinuses • Veins with dural walls • Separation of layers

  9. Spinal Dura • Not adherent to bone except… • Epidural and subdural spaces

  10. Ventricles Pia Ependyma Diagrammatic Cross Section The “hollow” brain

  11. Pia and Ependyma In some locations pia mater and ependyma come together. A plexus of blood vessels “invaginates” the thin layer. Cerebrospinal fluid enters the ventricle across this membrane.

  12. Ventricular System Lateral (1 + 2) Lateral (1 + 2) 3 3rd 4 4th

  13. Cerebrospinal Fluid • Choroid plexus • Ventricles • Openings in the fourth ventricle • Subarachnoid Space

  14. CSF – Back to Blood • Arachnoid Granulations (and villi)

  15. Granulations • Delicate projections into a sinus • One-way flow into the sinus • Increased pressure in the sinus blocks the flow Last slide!

More Related