Meninges and ventricles

Question 1

what are the 3 layers of the meninges?

Answer 1

dura, arachnoid and pia

Question 2

What CNs innervates the dura?

Answer 2

supratentorially: V- trigeminal
infratentorially: vagus X and cervical roots

Question 3

What makes up the leptomeninges?

Answer 3

pia and arachnoid layers

Question 4

Flow of CSF?

Answer 4

Lateral-> foramen of monro->3rd -> aqueduct of sylvius->4th ->either foramen of Magendie (medially) or foramen of Lushka (laterally)–> subarachnoid space

Question 5

carbonic anhydrase and CSF?

Answer 5

some role in CSF production

Question 6

What rate is CSF produced at?

Answer 6

0.35 mL/min or 600 mL/day

Question 7

What is obstructive hydrocephalus?

Answer 7

noncommunicating hydrocephalus
obstruction of the ventricular system
**ventricles above the level of the obstruction will be enlarged

Question 8

What is nonobstructive hydrocephalus?

Answer 8

Communicating hydrocephalus
poor aborsption by arachnoid granules
**all of the ventricles will be enlarged