Neuro

Question 1

What are glial cells?

Answer 1

Support neuronal function by:
-creating healthy ionic environment
-modulating nerve conduction
-controlling reuptake of NT
-repairing neurons following neuronal injury

Question 2

Name the types of glial cells and their functions

Answer 2

Question 3

Name all cranial nerves and their functions

Answer 3

Question 4

All cranial nerves are part of the peripheral nervous system EXCEPT?

Answer 4

Optic nerve (only one surrounded by dura)
Because part of CNS it is bathed in CSF

Question 5

CSF volume and specific gravity?

Answer 5

Question 6

Order of CSF flow?

Answer 6

1. Lateral ventricles
2. Foramen of Monro
3. Third ventricle
4. Aqueduct of Sylvius
5. Fourth ventricle
6. Foramen of Luschka (lateral apertures)
7. Foramen of Magendie (medial apertures)

Question 7

Determinants of CBF?

Answer 7

-Cerebral metabolic rate for oxygen (CMRO2)
-CPP
-Venous pressure
-PaCO2
-PaO2

Question 8

Maximal vasodilation occurs at?

Answer 8

PaCO2 of 80-100 mmHg

Question 9

Maximal vasoconstriction occurs at?

Answer 9

PaCO2 of 25 mmHg

Question 10

A PaO2 of ____ causes cerebral vasodilation and increases ICP?

Answer 10

Below 50-60 mmHg

Question 11

A PaO2 above ____ does not affect cerebral blood flow

Answer 11

60 mmHg

Question 12

Cerebral perfusion pressure range?

Answer 12

50-150 mmHg

Question 13

TBI anesthetic management

Answer 13

Keep CPP > 70 mmHg
Prolonged hyperventilation can worsen cerebral ischemia
Avoid steroids