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How do the meninges and cerebrospinal fluid (CSF) function together in a healthy nervous system? What are the roles of the meninges and CSF?

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Nelly Stracke
Nelly StrackeLv2
28 Sep 2019
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Related questions

1. Cerebrospinal fluid is separated from the body by what isknown as the blood-brain barrier. Yet changes in arterial PCO2cause a proportional response in cerebrospinal fluid PCO2. Why isthis?

A. The cells forming the capillaries in the brain contain CO2channels which allow CO2 into the CSF via diffusion.

B. The cells forming the capillaries in the brain contain CO2channels which allow CO2 into the CSF via facilitateddiffusion.

C. CO2 is actively transportedinto the CSF using ATPase pumps.

D. CO2 is not restricted bycapillary barriers.

9. What are the meninges and how does the cerebral spinal fluid flow through them and the brain?

A previously healthy 30-year-old mother collapsed after taking her children to school. In the Emergency Department, she appeared confused and complained bitterly of a severe generalized headache and that the room lights were too bright. Abnormal findings on physical examination were limited to blood pressure 180/110 and apparent restriction of cervical spine movements. After admission to hospital a neurologist confirmed photophobia, neck stiffness and raised blood pressure. He performed a lumbar puncture and found blood in the cerebrospinal fluid (CSF).

Questions:

2. How are samples of CSF usually obtained?

3. What is a safe vertebral level to attempt lumbar puncture and what layers are traversed?

4. Why was the patient’s neck stiff even though she had no history of cervical spine disease?

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