Brainstem & Cranial Nerves

Question 1

Function of the midbrain

Answer 1

Vision, hearing, motor control, sleep/wake, arousal (alertness), circadian rhythm, temperature regulation, articulation, and coordination.

Question 2

Where is the midbrain located

Answer 2

Beneath the thalamus

Question 3

Function of the pons

Answer 3

Contains tracts that carry signals from the cerebrum to the medulla and cerebellum and also tracts that carry sensor signals to the thalamus

Question 4

Where is the pons located

Answer 4

Connects to the cerebellum by the cerebellar penduncles; ascending pon nuclei around 4th ventricle to reach cerebellum

Question 5

What are peduncles

Answer 5

White matter

Question 6

Function of the medulla

Answer 6

Contains the cardiac (heartbeat), respiratory (oxygen levels), vomiting, and vasomotor centers dealing with heart rate, breathing, and blood pressure

Question 7

What system is the ventral side of the brainstem responsible for

Answer 7

Motor

Question 8

What system is the dorsal side of the brainstem responsible for

Answer 8

Sensory

Question 9

CN I

Answer 9

Olfactory

Question 10

CN II

Answer 10

Optic

Question 11

CN III

Answer 11

Oculomotor

Question 12

CN IV

Answer 12

Trochlear

Question 13

CN V

Answer 13

Trigeminal

Question 14

CN VI

Answer 14

Abducens

Question 15

CN VII

Answer 15

Facial

Question 16

CN VIII

Answer 16

Vestibulocochlear

Question 17

CN IX

Answer 17

Glossopharyngeal

Question 18

CN X

Answer 18

Vagus

Question 19

CN XI

Answer 19

Spinal Accessory

Question 20

CN XII

Answer 20

Hypoglossal

Question 21

Primarily Sensory CN

Answer 21

I, II, VIII

Question 22

Primarily Motor CN

Answer 22

III, IV, VI, XI, XII

Question 23

Mixed sensory and motor CN

Answer 23

V, VII, IX, X

Question 24

Is sensory afferent or efferent

Answer 24

Afferent

Question 25

Is motor afferent or efferent

Answer 25

Efferent

Question 26

Somatic sensory fibers

Answer 26

Fibers that convey information from receptive endings for pain, temperature, and mechanical stimuli in skin, muscles, joints

Question 27

Visceral sensory fibers

Answer 27

Fibers convey information from receptive endings in structures like blood vessel walls or walls of digestive tract

Question 28

Visceral motor fibers

Answer 28

Fibers that have autonomic axons

Question 29

Somatic motor fibers

Answer 29

Fibers innervate skeletal muscle

Question 30

General vs. special fibers

Answer 30

Broad or unique receptors and neurons that serve typical functions (touch, position) or additional functions (taste)

Question 31

What does afferent mean

Answer 31

Entering, coming toward periphery

Question 32

What does efferent mean

Answer 32

Exciting, disperse out of periphery

Question 33

Classification of CN I

Answer 33

SVA

Question 34

Classification of CN II

Answer 34

SSA

Question 35

Classification of CN III

Answer 35

GSE, GVE

Question 36

Classification of CN IV

Answer 36

GSE

Question 37

Classification of CN V

Answer 37

GSE, GSA

Question 38

Classification of CN V

Answer 38

GSE

Question 39

Classification of CN VI

Answer 39

GSE

Question 40

Classification of CN VII

Answer 40

SVE, GVE, SVA, GVA, GSA

Question 41

Classification of CN VIII

Answer 41

SSA

Question 42

Classification of CN IX

Answer 42

SVE, GVE, SVA, GSA, GVA

Question 43

Classification of CN X

Answer 43

SVE, GVE, SVA, GVA, GSA

Question 44

Classification of CN XI

Answer 44

SVE

Question 45

Classification of CN XII

Answer 45

GSE

Question 46

CN in midbrain

Answer 46

II, IV

Question 47

CN in pons

Answer 47

V, VI, VII, VIII

Question 48

CN in medulla

Answer 48

IX, X, XI, XII

Question 49

Function of CN I

Answer 49

Smell

Question 50

Function of CN II

Answer 50

Vision

Question 51

Function of CN III

Answer 51

Reflexive constriction of pupil, accommodation of lens for near vision, regulation of eye movement, & maintenance of open eyelid

Question 52

Function of IV

Answer 52

Eye movement: regulates superior oblique (a diagonal muscle in lateral & inferior directions)

Question 53

Oblique

Answer 53

A muscle neither parallel nor perpendicular to the long axis of a body or limb

Question 54

Function of VI

Answer 54

Responsible for lateral gaze movement and innervates lateral rectus

Question 55

Is the function of V sensory, motor, or mixed

Answer 55

Mixed function

Question 56

Function of V

Answer 56

Sensory: pain, temperature, and touch/proprioception from the ipsilateral side of face/forehead, teeth, anterior 2/3 tongue, palate Motor: muscles of mastication

Question 57

Ipsilateral

Answer 57

Same side control of where they come out of (damage on the left will have impairment on the left)

Question 58

What is the spinal trigeminal pathway for?

Answer 58

Mediates pain & temperature from face