Cranial nerves, meninges, ventrical system

Question 1

I.

Is the _olfactory nerv_e sensory or motor? What is its function?

Answer 1

sensory; its function is smell

Question 2

II.

Is the optic nerve sensory or motor? What is its function?

Answer 2

sensory; function is vision

Question 3

III.

is the oculomotor nerve motor or sensory? function?

Answer 3

motor; function is eye movements, pupillary constriction/accommodation, muscle of upper eyelid

Question 4

IV.

is the trochlear nerve motor or sensory? function?

Answer 4

motor; eye movements (intorsion, downward gaze)

Question 5

V.

is the trigeminal nerve sensory or motor? function?

Answer 5

sensory & motor; somatic sensation from face, mouth, cornea, muscles of mastication

Question 6

VI.

is the abducens nerve motor or sensory? function?

Answer 6

motor; eye movements (abduction, lateral movements)

Question 7

VII.

is the facial nerve motor or sensory? function?

Answer 7

sensory & motor; muscles of facial expression, taste (anterior tongue), lacrimal/salivary glands

Question 8

VIII.

is the vestibulochlear nerve sensory or motor? function?

Answer 8

sensory; hearing, balance

Question 9

IX.

is the glossopharyngeal nerve sensory or motor? function?

Answer 9

sensory & motor; posterior tongue, pharynx, salivary glands

Question 10

X.

is the vagus nerve sensory or motor? function?

Answer 10

sensory & motor; autonomic functions of gut, cardiac inhibition, larynx/pharynx, vocal cords, swallowing

Question 11

XI.

is the accessory nerve motor or sensory? function?

Answer 11

motor; shoulder & neck

Question 12

XII.

is the hypoglossal nerve motor or sensory? function?

Answer 12

motor; movements of tongue

Question 13

meninges

what is the dura matter?

Answer 13

outermost, tough layer

Question 14

meninges

what is the arachnoid matter?

Answer 14

middle layer, web-like, filled with fluid, cushions brain

Question 15

meninges

what is the pia matter?

Answer 15

innermost layer, delicate

Question 16

ventricles

what is the flow of CSF in the ventricle system?

Answer 16

lateral ventricles → interventricular foramina → 3rd ventricle → cerebral aqueduct → 4th ventricle → central canal

Question 17

ventricles

Label diagram

Answer 17

A. lateral ventricles

-interventricular foramina connects LV and 3rd ventricles-

B. 3rd ventricle

C. cerebral aqueduct

D. 4th ventricle

E. central canal

Question 18

ventricles

what is the purpose of CSF?

Answer 18

cushion and protection of the brain

Question 19

systems

what is the lymphatic system?

Answer 19

“sewer system” of body; protection of immune cells and removal/movement of excess fluids

Question 20

systems

what is the glymphatic system?

Answer 20

similar to lymphatic, but glial-dependent and in the brain; waste clearance pathway