Cranial Nerves

Question 1

1

Answer 1

Olfactory
Cribiform plate
Sensory - SVS
Smell

Question 2

CN 2: name, exit, function

Answer 2

Optic
Optic canal
Sensory
(SSS)

Question 3

sensory modalities

Answer 3

GSS
GVS
SSS
SVS

Question 4

General somatic sensory (GSS)

Answer 4

general sensation from skin

Question 5

General visceral sensory (GVS)

Answer 5

general sensation from viscera

Question 6

Special somatic sensory (SSS)

Answer 6

senses derived from ectoderm (e.g. sight, sound, balance).

Question 7

Special visceral sensory (SVS)

Answer 7

senses derived from endoderm (e.g. taste, smell).

Question 8

3

Answer 8

Oculomotor
Superior orbital fissure of sphenoid
Motor
(GSM & GVM)
GSM: 4 extrinsic eye muscles and levator palpebrae superioris.
GVM: pupillary sphincter

Question 9

4

Answer 9

Trochlear
Superior orbital fissure of sphenoid
Motor
(GSM)
Superior oblique

Question 10

CN 5 - 1ST branch: Which nerve, skull opening, type of nerve, nerve supply

Answer 10

Trigeminal Ophthalmic
Superior orbital fissure
GSS
Scalp, forehead and nose.

Question 11

CN 5- 2nd branch: name of nerve, exit, funciton and muscle innervation

Answer 11

Trigeminal Maxillary
F. Rotundum of sphenoid
GSS
Cheeks, lower eye lid, nasal mucosa, upper lip, upper teeth and palate.

Question 12

5- 3rd branch

Answer 12

Trigeminal Mandibular
F. Ovale of sphenoid
GSS
SVM
GSS: anterior 2/3 tongue, skin over mandible and lower teeth.
SVM: muscles of mastication.

Question 13

6

Answer 13

Abducens
Superior orbital fissure
Motor
(GSM)
Lateral rectus

Question 14

motor modalities

Answer 14

GSM
GVM
SVM

Question 15

What tissue does General somatic motor (GSM) nerves supply?

Answer 15

skeletal muscles.

Question 16

General visceral motor (GVM

Answer 16

smooth muscles of gut and autonomic motor

Question 17

Special visceral motor (SVM)

Answer 17

muscles derived from pharyngeal arches

Question 18

CN 6- Name of nerve, skull exit, motor or sensory, muscle innervation

Answer 18

Abducens
Superior orbital fissure
Motor
(GSM)
Lateral rectus

Question 19

7

Answer 19

Facial
Internal acoustic meatus > stylomastoid f.
GSS
SVS
SVM
GVM
GSS: sensation to part of ext. ear.
SVS: taste from ant. 2/3 tongue, hard and soft palate.

SVM: muscles of facial expression.

GVM: lacrimal, submandibular, sublingual glands and mucous glands of mouth and nose.

Question 20

CN 8: Name, exit, function, sensory vs motor

Answer 20

Vestibulocochlear
Internal acoustic meatus
Sensory
(SSS)
Hearing and balance

Question 21

9

Answer 21

Glossopharyngeal
Jugular f.
GSS
GVS
SVS
GVM
SVM
GSS: post. 1/3 tongue, ext. ear, and middle ear cavity.
GVS: carotid body and sinus.

SVS: taste from post. 1/3 tongue.

GVM: parotid gland.

SVM: stylopharyngeus

Question 22

10

Answer 22

Vagus
Jugular f.
GSS
GVS
SVS
GVM
SVM
GSS: ext. ear, larynx and pharynx.
GVS: larynx, pharynx and, thoracic & abdominal viscera.

SVS: taste from epiglottis region of tongue

GVM: smooth muscles of pharynx, larynx and most of the GIT.

SVM: most muscles of pharynx and larynx.

Question 23

11

Answer 23

Spinal accessory	
Jugular f.
Motor
(GSM & SVM)
GSM: trapezius and sternocleidomastoid.
SVM: a few fibres run with CNX to viscera.

Question 24

12

Answer 24

Hypoglossal
Hypoglossal canal
Motor
(GSM)
Intrinsic and extrinsic tongue muscles (except the palatoglossus).