Notes on Ventricular System

  >   Rahul's Noteblog   >   Notes on Neurology   >   Notes on Ventricular System

CSF Facts:

• Protection of brain.

• Produced by choroid plexus.


Communicating hydrocephalus:

• Overproduction of CSF.

Noncommunicating hydrocephalus:

• Blocked CSF flow.

Normal Pressure hydrocephalus:

• CSF not absorbed by arachnoid villi; enlarged ventricles.


Two lateral

• Located deep within cerebral hemispheres.


• Located in midline within diencephalon.


• Located between dorsal surfaces of pons and upper medulla, and ventral surface of cerebellum.


• [Lateral] - interventricular foramen (foramen of Monro) - [third] - interventricular foramen (foramen of Monro) - [Lateral.]

• [Third] - cerebral aqueduct (of Sylvius) - [fourth.]

CSF Composition:

• 70% secreted by choroid; 30% is by metabolic water production.

Subarachnoid Space Location:

• Subarachnoid space lies outside CNS.

CSF Flow through Subarachnoid Space:

• CSF exits CNS (to flow into the subarachnoid space) through three openings in fourth ventricle:

• Two lateral foramina of Luschka.

• Medical foramen of Magendie.

• Then, CSF flows around brain and spinal cord; returns to venous system through superior sagittal dural venous sinus.

Choroid Plexus Papilloma:

• CSF oversecretion.


• Limits absorption in superior sagittal dural venous sinus.

Enlarged Ventricles:

• Press cortex against the skull.

Unusual Cells in CSF:

RBCs in CSF:

• Trauma.

Protein in CSF:

• CNS tumor.

Blood-brain barrier:

• Formed by capillary endothelium connected by tight junctions; maintained by astrocytes.

• Free diffusion: water.

• Carrier-mediated diffusion: glucose.

Blood-CSF barrier:

• Formed by epithelial cells of choroid plexus.

• Similar transport mechanisms to blood-brain barrier.

Additional Readings:

Basic Neurology

1. Peripheral Nervous System
2. Central Nervous System
3. The Ventricular System
4. The Spinal Cord
5. The Brain Stem
6. The Cerebellum
7. Visual Pathways
8. Diencephalon
9. Basal Ganglia
10. Cerebral Cortex
11. Sleep Disorders
12. Autonomic Nervous System
13. Cranial Nerves and Parasympathetic Ganglia
14. Cells of the Nervous System
15. Cerebrospinal fluid
16. Additional short notes on Cerebrum
17. Functions and Diseases of Cerebrum
18. Subcortical Grey Matter
19. Notes on The Spinal Cord
20. Regulation of Heart Rate by Autonomic Nervous System
21. Action Potentials, Axon Conduction, and Neuromuscular Junction
22. Types of Seizures
23. What is a Cough Reflex?
24. Notes on Congenital Prosopagnosia
25. Findings in Parkinson's Disease
26. Types of Heat Strokes
27. Types of Strokes
28. What is Benign Intracranial Hypertension?
29. What is Cauda Equina Syndrome?
30. Cranial Nerve Locations in Brain Stem
31. What is a Cluster Headache?
32. What is a Subarachnoid Hemorrhage?
33. What is a Tension Headache?

Neurology Videos

1. Video of Neurology Examination in a Clinical Setting

Medical Images

Useful Medical Images & Diagrams (link opens in a new window)

Related Topics

1. Nervous System Disorders
2. Histology of Nervous Tissue
3. Cranial Nerve Reflexes
4. Motor System Examination

Random Pages:

My Experience during the Iraqi Invasion of Kuwait Body-Mass-Index, Waist-to-Height Ratio, Body Fat, Basal Metabolic Rate Calculator
Video of me playing Yanni`s "Nightingale" Notes on Renal/Urinary System
Notes on Abdomen, Pelvis, and Perineum Notes on Prenatal Infections
Notes on Pyruvate Metabolism What is Pulseless Electrical Activity?
Effects of Drugs on Fetal Development Notes on Types of Jaundice
Notes on Basic Gastrointestinal Physiology What is Time?
Review of Delta Roma Imperiale Fountain Pen What is an ELEK`s Test?
Why did I decide to become a doctor? Medical School Admissions Essay Video: Titanic Piano Theme: The Portrait
Corporate Failure: The Enron Case My Experience during the Iraqi Invasion of Kuwait
USMLE Blood Lab Values Regulation of Heart Rate by Autonomic Nervous System
Images of Antibodies Video of me playing Hagood Hardy`s "The Homecoming"
Notes on Integument Differentiation and Anatomy of a Blastocyst
Notes on Cell Components Notes on Nervous Tissue
Voices from Hell: My Experience in Mussoorie, India Video of Cardiology Examination in a Clinical Setting

Please Do Not Reproduce This Page

This page is written by Rahul Gladwin. Please do not duplicate the contents of this page in whole or part, in any form, without prior written permission.