Cranial Nerve Dysphagia

Question 1

Sensory Receptive Field

• Hard/soft palate, teeth, cheek
• Ant 2/3 tongue

Answer 1

CN V (Trigeminal)

Function

• Tactile sensation
• Bolus manipulation/prep

Question 2

Motor Innervation- Muscle

• Mylohyoid
• Ant belly of digastric
• Tensor veli palatini

Answer 2

CN V (Trigeminal)

Function

• Ant hyolaryngeal excursion
• Prevents nasal regurg
• Generates pos pressure

Question 3

Sensory - Receptive Field

Ant 2/3 tongue

Answer 3

CN VII (Facial)

Function
Taste (motivation to eat/drink)

Question 4

Motor Innervation - Muscle
-Orbicularis oria
Buccinator
-Posterior BoD
-Stylohyoid

Answer 4

CN VII (Facial)

Function

• Oral bolus containment/mastication
• Laryngeal elevation

Question 5

Sensory - Receptive Field

• Post 1/3 tongue
• Faucial arches
• Oropharynx (post-phar wall)

Answer 5

CN IX (Glossopharyngeal)

Function

• Taste
• Initiate phar swallow

Question 6

CN IX (Glossopharyngeal)
Motor Innervation

Answer 6

NONE

Question 7

Sensory Receptive field

• Tongue base
• Supraglottic larynx (vall, epi, ariepi)
• TVF & FVF
• Pyriform
• Post phar wall

Answer 7

CN X (Vagus) SLN

Function

• Tongue based tactile sensation
• Phar swallow
• Initiation of laryngeal closure
• Airway protection

Question 8

Motor Innervation - Muscle

• palatoglossus
• palatopharyngeus
• levator veli palatini
• pharyngeal constrictors
• CP

Answer 8

CN X (Vagus)

Function

• oral bolus containment, prevent nasal regurg, pos pressure generator
• Phar contraction
• Airway closure
• PES relaxation and opening

Question 9

Sensory Receptive Field

-subglottic regions

Answer 9

CN X (Vagus) RLN

Function

• tactile sensation
• Airway clearance (trap, cough, clear)

Question 10

CN XII (hypoglossus)
Sensory

Answer 10

NONE

Question 11

Motor Innervation - Muscle
Geniohyoid (C1-C2)
Thyrohyoid
Styloglossus

Answer 11

CN XII (hypoglossus)

Function

• Anterior hyolaryngeal excursion
• Laryngeal elevation
• TBR