Cranial Nerves Flashcards Preview

Motor Speech Disorders Exams 1 + 2 > Cranial Nerves > Flashcards

Flashcards in Cranial Nerves Deck (31):
1

The CNS includes (2)

1) Brain (cerebrum, cerebellum, brainstem)
2) Spinal Cord
(structures encased by bone)

2

The PNS includes (3)

1) Cranial nerves (12 pairs)
2) Spinal nerves (31 pairs)
3) Ganglia

3

12 Cranial Nerves

1) Olfactory
2) Optic
3) Occulomotor
4) Trochlear
5) Trigeminal
6) Abducens
7) Facial
8) Vestibulo-cochlear (Acoustic)
9) Glossopharyngeal
10) Vagus
11) (Spinal) Accessory
12) Hypoglossal

4

Cranial Nerves most important for speech (7)

V- Trigeminal
VII - Facial
VIII- Acoustic
IX - Glossopharyngeal
X - Vagus
XI - (Spinal) Accessory Nerve
XII - Hypoglossal

Mnemonic: "Try For Good A Vibe, Sweet Honey"

5

Cranial Nerve 1 - Olfactory Nerve responsible for...

sense of smell.

6

Cranial Nerve 1 - Olfactory Nerve afferent OR efferent?

afferent (sensory)

7

Cranial Nerve 2 - Optic Nerve responsible for...

vision

8

Cranial Nerve 2 - Optic Nerve afferent OR efferent

afferent (sensory)

9

Cranial Nerve 3 - Occulomotor Nerve responsible for....

innervating extrinsic muscles of the eye
innervating light and accommodation reflexes
(motor movement of the eye)

10

Cranial Nerve 3 - Occulomotor afferent OR efferent?

efferent (motor movement)

11

Cranial Nerve 4 - Trochlear Nerve responsible for...

innervating muscles of the eyes
(motor movement)

12

Cranial Nerve 4 - Trochlear Nerve afferent OR efferent?

efferent

13

Cranial Nerve 5 - Trigeminal Nerve responsible for...

Sensation for pain, thermal, tactile in the face, forehead, mouth, nose and teeth

Innervating muscles of mastication
o responsible for jaw movement
o jaw deviates to weak side


*important for speech

14

Cranial Nerve 5 - Trigeminal Nerve afferent OR efferent?

Both

15

Cranial Nerve 6 - Abducens Nerve responsible for...

innervating eye movement (outward)
(motor movement)

16

Cranial Nerve 6 - Abducens Nerve afferent OR efferent?

efferent (motor movement)

17

Cranial Nerve 7 - Facial Nerve responsible for...

Innervating muscles of facial expression and neck muscles
o bilateral innervation to upper muscles of facial expression
o contralateral innervation to lower muscles of facial expression.
o innervates orbicularis oris
o look for facial asymmetry


Sensing taste in the anterior 2/3 of tongue
Sensation for hard and soft palate
Sensation for ears

*important for speech

18

Cranial Nerve 7 - Facial Nerve afferent OR efferent?

Both

19

Cranial Nerve 8 - Acoustic Nerve/Vestibulo-cochlear Nerve responsible for...

sensation: hearing and balance
o Carries auditory signal to primary auditory cortex

*important for speech

20

Cranial Nerve 8 - Acoustic Nerve/Vestibulo-cochlear afferent or efferent?

afferent (sensation)

21

Cranial Nerve 9 - Glossopharyngeal Nerve responsible for...

Sensation of posterior 1/3 of tongue and pharynx (damage affects gag reflex)

Innervating elevation muscles of the larynx and dilation of the pharynx - stylopharyngeus muscle which elevates pharynx during swallowing and speech


*important for speech (gagging and swallowing)

22

Cranial Nerve 9 - Glossopharyngeal Nerve afferent OR efferent?

Both

23

Cranial Nerve 10 - Vagus Nerve responsible for...

Sensation of the pharynx, larynx, trachea

Motor movement of the palate (elevation + depression)
Motor movement of the larynx

*severed/damage to the vagus can cause vocal fold paralysis
*important for speech (70% of speech is voiced)

24

Cranial Nerve 10 - Vagus Nerve afferent or efferent?

Both

25

Cranial Nerve 11 - (Spinal) Accessory Nerve responsible for...

-breathing- innervates sternocleidomastoid and trapezius muscles
-contributes with Vagus fibers to innervation of levator palatini

*important for speech (breathing)

26

Cranial Nerve 11 - (Spinal) Accessory Nerve afferent OR efferent?

Efferent (motor movement)

27

Cranial Nerve 12 - Hypoglossal Nerve responsible for...

innervating intrinsic and extrinsic muscles of the tongue, lowering soft palate, elevating sides of tongue

*important for speech: extrinsic and intrinsic muscles of the tongue (position + shape of the tongue)
*Tongue deviates to weak side on protrusion.

28

Cranial Nerve 12 - Hypoglossal Nerve afferent OR efferent?

Efferent (muscles movement)

29

mnemonic for remembering afferent vs. efferent:

I: Some (sensory)
II: Say (sensory)
III: Money (motor)
IV: Matters (motor)
V: But (Both)
VI: My (Motor)
VII: Brother (Both)
VIII: Says (Sensory)
IX: Big (Both)
X: Brains (Both)
XI: Mater (Motor)
XII: Most (Motor)

30

mnemonic for remembering Cranial Nerves (sorry it is inappropriate)

I: Oh (Olfactory)
II: Oh (Optic)
III: Oh (Occulomotor)
IV: To (Trochlear)
V: Touch (Trigeminal)
VI: And (Abducens)
VII: Feel (Facial)
VIII: A (Auditory [Vestibulo-cochlear])
IX: Girl's (Glossopharyngeal)
X: Vagina (Vagus)
XI: So (Spinal Accessory)
XII: Heavenly (Hypoglossal)

31

3 branches of the Vagus Nerve (Cranial Nerve X):

o Pharyngeal branch – elevates levator palatini closing off VP port and palatoglossus muscle of tongue.
o Superior laryngeal branch – innervates cricothyroid muscles of larynx
o Recurrent laryngeal branch – innervates all other intrinsic laryngeal muscles.