Cranial Nerves

Question 1

CN I

Answer 1

1. Olfactory
   Sensory
   Function: Sense of smell
   Origin: Nasal Cavity
   Termination: Temporal Lobe

Question 2

CN II

Answer 2

2. Optic
   Sensory
   Function: sense of sight
   Origin: Eyeball
   Termination: Occipital lobe

Question 3

CN III

Answer 3

3. Oculomotor
   Somatic Motor
   Function: Move eye and raise eyelid
   Origin: Midbrain
   Termination: Muscles of eyeball

Parasympathetic:
Function: Constrict pupil and ciliary myos

Question 4

CN IV

Answer 4

4. Trochlear
   Somatic motor
   Function: Superior oblique (moves eye inferolaterally)
   Origin: Midbrain
   Termination: On the superior oblique

Question 5

CN V

Answer 5

5. Trigeminal
   Sensory:
   
   • V1: Opthalmis
   • V2: Maxillary
   • V3: Mandibular
     Function:
   • V1: Feeling Forehead
   • V2: Feel nose
   • V3: Feel jaw and sensation
     of anterior 2/3 of
     tongue
     Origin: Face/tongue
     Termination: Pons

Somatic Motor:
Function: Myos of mastication
Origin: Pons
Termination: Muscles

Question 6

CN VI

Answer 6

6. Abducens
   Somatic Motor
   Function: Lateral Rectus (move eye laterally)
   Origin: Pons
   Termination: Eye muscle

Question 7

CN VII

Answer 7

7. Facial
   Sensory
   Function: Taste of anterior 2/3 tongue
   Origin: Tongue
   Termination: Pons

Somatic Motor
Function: Myos of facial expression
Origin: Pons
Termination: Myo

Parasympathetic
Function:
- Lacrimal glands: Produce
tears
- Salivary Glands: secrete
saliva
Origin: Pons
Termination: Gland

Question 8

CN VIII

Answer 8

8. Vestibulocochlear
   Sensory
   Function:
   
   • V: Sense of balance/equilibrium
   • C: Sense of hearing
     Origin: Ear
     Termination: Pons

Question 9

CN IX

Answer 9

9. Glossopharyngeal
   Sensory
   Function: Allow for sensation and taste on posterior 1/3 of tongue
   Origin: Tongue
   Termination: Medulla

Sensory Motor
Function: Myo swallow
Origin: Medulla
Termination: Muscle

Parasympathetic:
Function: Salivary glands
Origin: Medulla
Termination: Gland

Question 10

CN X

Answer 10

10. Vagas
    Sensory
    Function: GI tract, larynx, pharynx
    Origin: Organ
    termination: Medulla

Sensory motor
Function: Muscles for swallowing
Origin: medulla
Termination: muscles

Parasympathetic:
Function: Abdominal organs (digest food), decrease heart rate and breathing rate
Origin: Medulla
Termination: Organ

Question 11

CN XI

Answer 11

11. Spinal Accessory
    Sensory Motor
    Function: SCM and trapezius
    Origin: Medulla
    Termination: Muscle

Question 12

CN XII

Answer 12

12. Hypoglossal
    Sensory Motor
    Function: Genioglossus and stylogssus