Cranial Nerve Features

Question 1

Which 4 Cranial Nerves are have Parasympathetic features?

Answer 1

3,7,9,10

III Oculomotor;

VII Facial,

IX Glossopharyngeal,

X Vagus

Question 2

Which 5 Cranial Nerves have Somatic Motor Inervations?

Answer 2

3, 4, 6, 11, 12

III Oculomotor:Sup, Med, Inf Recti and Inf. Oblique Eye Muscles;

IV Trochlear: Sup. Oblique Eye Muscle (SO4);

VI Abducens: Lat. Rectus Eye Muscle (LR6);

XI Spinal Accessory: Sternomastohyoid Muscle,Trapezius Muscle

XII Hypoglossal: Intrinsic/Extrinsic Muscles of Tongue (NOT palatoglossus)

Question 3

Which 4 cranial nerves innervate Branchial derived muscles?

Answer 3

V3,7,9,10

**V3 Mandibular: Arch 1: ** Muscles of mastication, Ant. Belly of Digastric,Mylohyoid, Tensor Tympani, & Tensor Palatini

VII Facial: Arch 2: . Skin of Small Part of Ear

IX Glossopharyngeal: Arch 3: Stylopharyngeus Muscle

X Vagus: Arch 4: Levator Palati, Musculus, Uvulae, Palatoglossus, Pharyngeal Constrictors, Int. Laryngeal muscles (Arch 4, From Cranial Root of CN XI)

X Vagus: Arch 6:Mucosa of Pharynx, Larynx, Trachea, Esophagus & Thoracic/Abdominal Viscera (Arch 6)

Question 4

Which 6 cranial nerves innervated by General Sensory?

Answer 4

V1,V2,V3,7,9,10

V1 Ophtalmic : Skin of Upper Face

V2 Maxillary : Skin of Mid Face, Nasal & Palate Mucosa, Upper Teeth and Gums

V3 Mandibular : Skin of Lower Face, Mucosa of ant. 2/3 of tongue, floor of mouth, lower teeth & Gums, Ext. Ear

VII Facial (tiny bit) : Skin of Small Part of Ear

IX Glossopharyngeal : 1 (Somatic) Skin of Small Part of Ext. Ear …………..2. (Visceral) Mucosa of post. tongue, tonsil, middle ear, nasopharynx, oropharynx, carotid sinus/body

X Vagus : Skin of Small Part of Ear

Question 5

Which 6 cranial nerves innervated by Special Sensory?

Answer 5

1, 2, 7, 8, 9, 10

I Olfactory: Olfactory Nasal Mucosa (NOSE)

II Optic: Retina (EYES)

VII Facial: Taste : Ant. 2/3 of Tongue

VIII Vestibulocochlear: Hearing Balance: Semicircular canals, utricle, saccule (gravity, acceleration, deceleraton) cochlea (hearing)

IX Glossopharyngeal: Taste: Post. 1/3 of tongue

X Vagus: Taste: Epiglottis

Question 6

Which 4 cranial nerves innervated by Visceral Motor?

Answer 6

3,7,9,10

III Oculomotor: Ciliary Ganglion to Sphincter Pupillae & Ciliary Muscles

VII Facial: Pterygopalatine ganglion to glands in nasal mucosa & palatine/lacrimal glands AND via submandibular ganglion to submandibular/sublingual glands & labial, buccal, lingual glands

IX Glossopharyngeal: Via Otic Ganglion to Parotid Gland

X Vagus: postganglionic neurons to glands & smooth muscle of thoracic/abdominal viscera

Question 7

Which Cranial Nerves Are inevated by both sensory and motor?

Answer 7

7,9,10

VII Facial

IX Glossopharyngeal

X Vagus