Cranial nerves 2

Question 1

Ophthalmic nerve, Maxillary, Mandibular- sensory or motor- somatic or autonomic?

Answer 1

Ophthalmic nerve- mostly sensory.
Maxillary- mostly Sensory
Mandibular- Sensory and Motor (somatic)

Question 2

Maxillary nerve has sensory fibres to…

Answer 2

Maxilla and overlying skin.
Maxillary sinuses.
Nasal cavity.
Palate
Nasopharynx
Maxillary teeth
Portion of the dura mater

Question 3

Motor component of the maxillary division is to the

Answer 3

lacrimal gland

Question 4

Zygomatic nerve

Answer 4

-Sensory.
-Formed by zygomaticofacial (skin of the cheek) and zygomaticotemporal (skin of the temporal).
-Conveys postganglionic parasympathetic fibres to the lacrimal nerve.

Question 5

Infraorbital nerve

Answer 5

-Sensory
-Merger of cutaneous branches from upper lip, medial portion of cheek, lower eyelid and side of nose.

Question 6

Nasopalatine nerve

Answer 6

-Sensory nerve for the anterior hard palate, tissues around maxillary anterior teeth, tissues around nasal septum.

Question 7

Greater palatine nerve

Answer 7

Sensory nerve of the posterior hard palate and posterior lingual gingiva

Question 8

Lesser palatine nerve

Answer 8

Sensory nerve for the soft palate and palatine tonsils

Question 9

Anterior Superior Alveolar nerve

Answer 9

Sensory nerve of sensation and pain for central & lateral incisors and canines.

Question 10

Middle superior alveolar nerve

Answer 10

Sensory nerves of sensation and pain of upper pre-molar and mesiobuccal root of the upper first molar.
Sinus mucosa and periodontium and buccal gingiva.

Question 11

Posterior superior alveolar nerve

Answer 11

Sensory nerves of sensation of upper 2nd and 3rd molars and 2/3 roots of the 1st molar.

Question 12

Trigeminal condition

Answer 12

Trigeminal neuralgia, nerve pain due to compression or inflammation or degeneration.
Treated by- botox, laser surgery, radiation therapy or alcohol injections.

Question 13

PATHWAY OF FACIAL NERVE PICTURE

Answer 13

Originates from the PONS-MEDULLA junction in the brainstem.
Passes through the INTERNAL ACOUSTIC MEATUS to leave the cranial cavity.
Goes through the FACIAL CANAL in the temporal bone.
Exits skull through the STYLOMASTOID FORAMEN.

Question 14

Five motor branches to the muscles of the facial expression

Answer 14

Temporalis branch- Superior orbicularis oculi
Zygomatic branch- Inferior zygomatic major
Buccal branch- Buccinator
Mandibular branch- Mentalis
Cervical branch- Platysma

Question 15

Bells Palsy

Answer 15

Idiopathic facial paralysis.
Due to inflammation or viral infection.
Treated by anti-inflammatory corticosteroids, antiviral drugs or physical therapy.

Question 16

Acoustic Neuroma

Answer 16

Lesion of schwann cell sheath covering cranial nerve V111 (8)
Leads to dizziness, tinnitus or hearing loss, can be removed by microsurgery.