Test 4 - Ch. 19

Question 1

Where are the Cranial Nn I through XII located?

Answer 1

Midbrain - III and IV
pons -
V, VI, VII, VIII

medulla - IX, X, XI, XII

Question 2

What is the pathway of control of Cranial nn?

Answer 2

cortex to BS
bilateral control

will yield same signs and symptoms

Question 3

Where does Cranial N I poke through and where is signal sent through?

Where is Cranial N I messages received?

What can dyfx lead to?

Answer 3

Nasal bone

through nasal sinus

insular cortex and amygdala which decided what is good for me and bad for me

c/o change in taste
TBI and MVA
could be precursor of neurodegenerative dz

Question 4

Cranial N II
What does it consist of?

WHERE IS INFORMATION SENT?

WHERE IS THE REFLEX RESPONSE INITIATED?

Answer 4

eyeball to chiasm

OPPOSITE LATERAL GENICULATE OF THALAMUS

SUPERIOR COLLICULUS

Question 5

WHAT ARE THE THREE CRANIAL NN THAT CONTROL EXTRAOCCULAR MM?

Answer 5

3, 4 AND 6

OCCULOMOTOR, TROCHLEAR, ABDUCENS

Question 6

WHAT MOVEMENTS DO THE OCCULOMOTOR, TROCHLEAR AND ABDUCENS CRANIAL NN INNERVATE?

Answer 6

OCCULOMOTOR - ALL

TROCHLEAR - DOWN AND IN

ABDUCENS - TOWARD EAR

Question 7

What is cranial N V and where is it?

Why is it so large?

Answer 7

Trigeminal - mastication and speaking MM, all sensory of Kenny’s face

somatosensory of eye

pokes out of pons belly

innervates large somatosensory

Question 8

Cranial Nn VI

Answer 8

Abducens

Question 9

Cranial Nn VII

Answer 9

Facial

closes eye and tears up

FACIAL MOTOR expressions
SOME SENSATION FROM TONGUE AND ORAL CAVITY
SPECIAL TASTE FROM ANTERIOR 2/3 TONGUE (SWEET, SALT, SOUR)

Glands (salivary, nasal, lacrimal)
SALIVARY – UNDER TONGUE
NASAL – RUN NOSE
LACRIMAL - CRY

Question 10

How will damage look with Cranial N VII between CVA and Bell’s Palsy?

Answer 10

Bell’s - 1/2

CVA - 1/4

Question 11

What are three ways we use auditory information?

Answer 11

1. inferior to superior colliculus - orient head to sound
2. reticular formation - adjust arousal
3. temporal lobe - medial geniculate body - conscious awareness of sound

Question 12

Cranial nn IX

Answer 12

Glossopharyngeal

tongue and part of throat back by throat

senses swallow/gag
tastes bitter on posterior 1/3 tongue
carotid sinus stretch receptor - helps determine BP

pharyngeal mm
parotid salivary

Question 13

Cranial N X

What happens with damage?

Answer 13

Vagus

motor and sensory of pharynx and larynx

viscera of thorax and abdomen

damage: trouble speaking
difficulty swallowing (does not close flap)
soft palate does not raise
poor digestion - peristalsis not turned on

Question 14

Cranial N XI

Answer 14

Spinal Accessory

striated Mm attaching to head

• up trap
• sternocleidomastoid

to test, lay down

Question 15

Cranial N XII

Answer 15

Hypoglossal

extrinsic of tongue

damage?
trouble speaking
unable to throw food back
will poke out to weak side

Question 16

What Cranial nn are involved in the oral stage and what will a person have trouble with if those are damaged?

Answer 16

V - Trigeminal - mastication

VII : facia - keeping food in

XII: Hypoglossal - move food side to side, tip back

Question 17

What Cranial nn are involved in the laryngeal/pharyngeal stage stage and what will a person have trouble with if those are damaged

Answer 17

IX: glossopharyngeal - sensing food to swallow

X: Vagus - closing flap of windpipe to swallow

Question 18

What Cranial nn are involved in the esophageal stage stage and what will a person have trouble with if those are damaged

Answer 18

X : Vagus - finishing peristalsis swallow

Question 19

What Cranial N are involved in speaking?

Answer 19

X - Vagus - larynx - puts vocal cords together, soft palate

V- Trigeminal - moves jaw

VII - facial - lips

XII - tongue