Cerebrospinal Fluid Question And Answers
Question 1. Write a short note on cerebrospinal flid (CSF).
Answer:
Cerebrospinal flid (CSF)
It is a modified tissue fluid present in the ventricular system of the brain and subarachnoid space around the brain and spinal cord.
Cerebrospinal Flid Formation
- Produced mainly by the choroid plexus of lateral ventricle and also by choroid plexus of third and fourth ventricle
- It is produced about 200 mL/hour.
Cerebrospinal Flid Circulation
- Cerebrospinal fluid passes from each lateral ventricle to the third ventricle through the interventricular foramen
- From third ventricle, it passes to fourth ventricle through cerebral aqueduct and to the subarachnoid space through median and lateral apertures of the fourth ventricles.
Cerebrospinal Fluid Absorption: Absorbed through arachnoid villi and granulations and drained to cranial venous sinuses.
Cerebrospinal Fluid Functions
- Cerebrospinal fluid decreases the sudden pressure on nervous tissue
- Nourishes nerve tissue
- Pineal gland secretions reach the pituitary via CSF.
Cerebrospinal Fluid Applied
- Lumbar puncture: It is done by passing a needle in L3 and L4 interspace to obtain cerebrospinal fluid for diagnostic and therapeutic purposes.
- Hydrocephalus: It is a condition caused by obstruction to the flow of the cerebrospinal fluid in the ventricular system of the brain in children.
Cerebrospinal Fluid Multiple Choice Question And Answers
Question 1. The cerebrospinal fluid is formed mainly by:
- Choroid plexus within the lateral ventricles
- Choroid plexus within the third ventricle
- Choroid plexus within the fourth ventricle
- Ependyma of the ventricles
Answer: 1. Choroid plexus within the lateral ventricles
Question 2. The term tela choroidea refers to:
- Ependymal element of choroid plexus
- Pial element of choroid plexus
- Vascular tufts of choroid plexus
- None of the above
Answer: 2. Pial element of choroid plexus