Cranial Nerve Intro

Question 1

CN I

Answer 1

Olfactory Nerve

Smell

Question 2

CN II

Answer 2

Optic Nerve

Vision

Question 3

CN III

Answer 3

Oculomotor Nerve

–Most extra-ocular muscles that moves the eyes

Question 4

CN IV

Answer 4

Trochlear Nerve

–Superior oblique extraocular muscle

Question 5

CN V

Answer 5

Trigeminal Nerve

• Muscles of mastication for chewing, etc

Question 6

CN VI

Answer 6

Abducens Nerve

–Lateral rectus extraocular muscle

Question 7

CN VII

Answer 7

Facial Nerve

–Muscles of facial expression, etc.

Question 8

CN VIII

Answer 8

Vestibulocochlear Nerve

Question 9

CN IX

Answer 9

Glossopharyngeal Nerve

–Muscles of pharynx and larynx

Question 10

CN X

Answer 10

Vagus Nerve

–Muscles of pharynx and larynx

Question 11

CN XI

Answer 11

Spinal Accessory Nerve

Question 12

CN XII

Answer 12

Hypoglossal Nerve

–Most muscles of tongue

Question 13

CN V1

Answer 13

Ophthalmic Nerve

Question 14

CN V2

Answer 14

Maxillary Nerve

Question 15

CN V3

Answer 15

Mandibular Nerve

Question 16

Somatic motor nerves innervate skeletal muscle derived from:

Answer 16

somites

Question 17

Branchial motor innervates skeletal muscles derived from:

Answer 17

branchial/pharyngeal arches

Question 18

COPS Ganglia

Answer 18

Ciliary (III)

Optic (IX)

Pterygopalatine (VII)

Submandibular (VII)

Question 19

Preganglionic parasympathetic fibers reach their target ganglia in the head via branches of …

Answer 19

CN III, VII or IX

Question 20

Postganglionic parasympathetic fibers reach their end organs by

Answer 20

Branches of CN V

Question 21

Preganglionic sympathetic origination and ending

Answer 21

•originate in upper thoracic levels (T1-T4) of the intermediolateral cell column

Ascend and terminate in superior cervical ganglion

Question 22

Sensory Cranial Nerves

Answer 22

Olfactory nerve (CN I)

Optic nerve (CN II)

Vestibulocochlear nerve (CN VIII)

Question 23

The optic nerve is formed by axons of

Answer 23

Ganglion cells of the retina.

Question 24

Vestibulocochlear nerve path

Answer 24

• It exits the skull with the facial nerve through the internal acoustic meatus.
• Once in the temporal bone it divides into two parts:

–the vestibular n. (balance)

–the cochlear n. (hearing).

Question 25

Motor Cranial Nerves

Answer 25

Oculomotor nerve (CN III) Trochlear nerve (CN IV) Abducens nerve (CN VI) Spinal accessory nerve (CN XI) Hypoglossal nerve (CN XII)

Question 26

Mixed Cranial Nerves

Answer 26

Trigeminal nerve (CN V) Facial nerve (CN VII) Glossopharyngeal nerve (CN IX) Vagus nerve (CN X)

Question 27

5 bones of skull base

Answer 27

Question 28

CN III parasympathetic nuclei and function

Answer 28

–CN III: accessory oculomotor nucleus (Edinger Westphal nucleus) - Supply smooth muscle of eye

Question 29

CN IV parasympathetoc nuclei and function

Answer 29

–CN VII: superior salivary nucleus Supply lacrimal gland for tears, 2 salivary glands, glands of nose and palate

Question 30

CN IX parasympathetic nuclei and function

Answer 30

–CN IX: inferior salivary nucleus •Supply parotid salivary gland

Question 31

CN X parasympathetic nuclei and function

Answer 31

–CN X: dorsal motor nucleus of vagus •Supply smooth muscle and glands in thorax and abdomen

Question 32

vestibular and chochlear cell body locations

Answer 32

Question 33

Oculomotor nerve function, cell bodies, types of fiber

Answer 33

Question 34

Trochlear nerve function, cell body function, path

Answer 34

Question 35

Abducens nerve function, cell bodies, types of fiber

Answer 35

Question 36

Spinal accesory nerve nerve function, cell bodies, types of fiber

Answer 36

XI. Spinal accessory nerve * Supplying the trapezius and sternocleidomastoid * Arises from spinal accessory nucleus of the upper 5 segments of the spinal cord which ascend through the foramen magnum * Exit the cranial cavity via the jugular foramen.

Question 37

Hypoglossal nerve nerve function, cell bodies, types of fiber

Answer 37

XII.Hypoglossal nerve * Innervating all intrinsic and most extrinsic musculature * The cell bodies of origin for CN XII are located in the hypoglossal nucleus. * The hypoglossal nerve leaves the cranial cavity through the hypoglossal canal * It enters the neck and loops around the occipital artery to enter the lateral side of the tongue.

Question 38

Ophthalmic division fiber type, cell bodies, cranial cavity entrance

Answer 38

Question 39

Maxillary division fiber type, cell bodies, cranial cavity entrance

Answer 39

Question 40

Mandibular division fiber type, cell bodies, cranial cavity entrance

Answer 40