Nervous 2

Question 1

What does SCALP stand for?

Answer 1

Skin
Connective tissue
Aponeurosis
Loose connective tissue
Periosteum

Question 2

What is the 3 layers of membrane the spinal cord and brain is surrounded by?

Answer 2

Dura mater
Arachnoid mater
Pia mater

Question 3

What is the function of CSF?

Answer 3

Buoyancy- 50g in csf compared to 1500g in air

Protection- hydrostatic buffer

Clearing waste

Chemical stability- influences the micro environment of neurons

Question 4

Where is the CSF produced?

Answer 4

Choroid plexus

Question 5

What are the ventricles of the brain?

Answer 5

Lateral ventricle
Interventricular foramen
Third ventricle
Aqueduct of midbrain
Fourth ventricle

Question 6

What does the ventricular system consist of?

Answer 6

Interventricular foramen of monroe
Third ventricle
Cerebral aqueduct
Fourth ventricle
Central canal

Question 7

What is the cycle of cfs?

Answer 7

Later ventricles
Interventricular foramen of monroe
Third ventricle
Cerebral aqueduct
Fourth ventricle

to which it can either go to:
Sub arachnoid space and then dural venous sinus (brain)

Or

Central canal (spinal cord)

Question 8

How is the cfs absorbed

Answer 8

By the arachnoid villi

Question 9

What is the order of the venous drainage system of the brain?

Answer 9

Superior sagittal and inferior sagital sinus (straight sinus for inferior)
Confluence of sinuses
Transverse sinus
Sigmoid sinus
Internal jugular vein

Question 10

CSF pathways summary

Answer 10

Csf is produced in the lateral, third and fourth ventricle by the choroid plexus

Csf travels from lateral ventricles through the interventricular foramina to 3rd ventricle then goes to cerebral aqueduct go 4th ventricle

Csf leaved the ventricle system and enters the subarachnoid spaces where it circulates to bathe the surfaces of brain and spinal cord

Csf leaves the subarachnoid space and enters the venous sinuses by unidirectional valves called arachnoids villi