Cranial Nerves

Question 1

Site the nerves.

Answer 1

Occulumotor
Glosso-Pharyngeal
Vagus
Hypoglossal
Spinal Accessory
Facial
Abducens
Vestibulo-Cochlea
Trochlear 
Trigeminal

Question 2

III ?

Answer 2

Rostral Mesencephalon

Occulumotor

• Occulomotor N (GSE): extraocular muscle
• Edinger Westphal N (GVE):iris sphincter, ciliary muscle

Question 3

IV ?

Answer 3

Rostral Pons

Trochlear

-Trochlear N (extra ocular mu: GSE)

Question 4

V ?

Answer 4

Middle Pons

Trigeminal

• Spinal Trigeminal N GSE : nociceptive from the head
• principal Trigeminal N GSE: cutaneous inf from the head
• Mesencephalic trigeminal N GSE: proprioception of mandibular muscle
• Motor Trigeminal N SVE : mastication muscle, tympanic and patati

Question 5

VI ?

Answer 5

Caudal Pons

Abducens

-Abducens N (extraocular mu = GSE)

Question 6

VII ?

Answer 6

Rostral Medulla

Facial

• Spinal trigeminal N GSA: auricular sensitivity
• Facial N SVE : facial expression
• Superior Salivatory GVE lacrymal glands etc
• N of the solitary tract (rostral & caudal) SVA/GVA :gustative & visceral cheek

Question 7

IX ?

Answer 7

Rostral Medulla

Glossopharyngeal

Spinal Trigeminal :retro auricular sensitivity
Inferior salivatory: parotide glands
N. Ambiguus:stylo pharyngeal pharynx constructor
N. Of the solitary tract Rostal/caudal:visc s for carotuduab synus, middle ear….

Question 8

X ?

Answer 8

x

Vagus N

Spinal Trigeminal N:pinna sensitivity
Ambiguus !!! heart / pharynx larynx mu
Dorsal motor vagus N: heart, digestive
N. of the solitary tract (rostral&caudal): gustative, visc s pharynx, larynx etc

Question 9

XI ?

Answer 9

Spinal accessory

Ambiguus: pharynx, larynx mu
Accessory N: trapeze, mastoid mu

Question 10

XII ?

Answer 10

Hypoglossal

Hypoglossal N (GSE) extrinsinc and intrinsic muscle of the tongue