Cranial nerve tests Flashcards Preview

Advanced Human Physiology > Cranial nerve tests > Flashcards

Flashcards in Cranial nerve tests Deck (46):
1

CN I

Ophthalmic - identify smells

2

CN II

Optic - read Snellen chart, assess when finger is observed moving into the visual field

3

CN III

Oculomotor - Pupil shape = round, equal, and +2. Pupillary reflex with penlight, convergence and ability to follow H pattern

4

CN IV

Trochlear - Follow figure H with eyes

5

CN V

Trigeminal - sensations of pain, touch and temperature of the face. "can you feel this?"

6

CN VI

Abducents - Follow figure H with eyes

7

CN VII

Facial - Taste in first 2/3 of tongue, symmetry of face, close eyes, smile, frown, tearing function

8

CN VIII

Vestibulocochlear - Finger rub, Weber and Rinne, Romberg tests.

9

CN IX

Glossopharyngeal - taste posterior 1/3, gag reflex, position of uvula, speak or swallow

10

CN X

Vagus - speak or swallow

11

CN XI

Accessory - shoulder shrug, head rotation to resistance

12

CN XII

Hypoglossal - no deviation of tongue upon extension

13

Normal conduction of hearing

air conduction is longer than bone conduction

14

Weber's test evaluates

sensorineural hearing and/or CN VIII damage

15

Rinne's test evaluates

bone conduction vs air conduction

16

The vestibule provides

linear acceleration

17

the semmicircular canals provide

angular acceleration

18

the cochlea provides

sound

19

Barany's test evaluates

nystagmus - fast component towards direction of angular acceleration

20

blind spot calculation

C = 10(2)/
measured blind spot +3

21

ficks

rate = change in concentration*xarea*time/
distance * MW

22

rate of diffusion for agar

distance/time

23

how does solubility affect rate of diffusion

Increased solubility = increase rate of diffusion

24

pupillary reflex

shine light into retina - CN II delivers sense to mesencephalon - CN III - constriction of pupils

25

if you cut the optic nerve you will lose vision

in the side that was cut

26

if you cut the optic tract you will lose vision

partially in both eyes

27

If you have problems with the geniculocalcarine tract you will lose

partial vision in both eyes.

28

a tumor or problem with the optic chiasm will result in

loss of vision in both eyes.

29

myopia

elongated eyeball, focal point in front of retina, concave lens to correct

30

hypermyopia

short eyeball, focal point behind retina, convex lens to correct

31

damage to auditory pathways in CNS causes

partial hearing loss in BOTH ears

32

the vestibulocochlear nerve enters the brainstem at the level of the

pons

33

Patellar reflex

L4 - knee jerk stretch reflex;
absence or hypoactive = peripheral nerve damage or ventral horn disease
hyperactive = corticospinal tract lesions

34

Achilles reflex

S1 = plantar flexion; absence = damage, sciatica, disc herniation, hypothyroidism, peripheral neuropathy

35

Corneal reflex

CN 5, 7 = blink reflex and pupil dilation; absence indicates brain stem damage

36

Gag reflex

CN 9 10 = contraction of back of throat

37

ciliospinal reflex

dilate pupil in response to pain in the neck face and upper trunk, pupil dilates on side of pain. Horner's syndrome

38

Plantar reflex

babinski's sign

39

which nerves are involved in heart rate and blood pressure

IX - glossopharyngeal
X - vagus

40

which nerves are involved in salivations

VII - facial
IX - glossopharyneal

41

which nerves are involved in mastication

V - trigeminal
XII - hypoglossal

42

which nerves are involved in swallowing

IX - glossopharyngeal
X - vagus
XI - accessory
XII - hypoglossal

43

afterimage is tested by

by rubberband test

44

adaption is tested by

weight on hand

45

thermoreceptors tested by

hand in hot/cold water

46

referred pain tested by

elbow in ice, pain in arm/shoulder