Cranial Nerves (Lec 20)

Question 1

How many cranial nerves are there

Answer 1

12 pairs

Question 2

Somatic NS transmits sensory signals related to ________ stimuli, and motor signals related to ______

Answer 2

External

Skeletal muscles

Question 3

Autonomic NS transmits sensory signals related to ______ stimuli and motor signals to _______

Answer 3

Internal

Visceral organs

Question 4

CN I name

Answer 4

Olfactory nerve

Question 5

CN II name

Answer 5

Optic nerve

Question 6

CN III name

Answer 6

Oculomotor nerve

Question 7

CN IV Name

Answer 7

Trochlear nerve

Question 8

CN V name

Answer 8

Trigeminal nerve

Question 9

CN VI name

Answer 9

Abducens nerve

Question 10

CN VII name

Answer 10

Facial nerve

Question 11

CN VIII name

Answer 11

Vestibulocochlear nerve

Question 12

CN IX name

Answer 12

Glossopharyngeal nerve

Question 13

CN X name

Answer 13

Vagus nerve

Question 14

CN XI name

Answer 14

Accessory nerve

Question 15

CN XII name

Answer 15

Hypoglossal nerve

Question 16

Mneumonic for cranial nerve names

Answer 16

Oh ——————————- Olfactory
Oh ———————————— Optic
Oh ——————— Occulomotor
To ————————— Trochlear
Touch —————————Trigeminal
And ————————- Abducens
Feel ———————————— Facial
a Virgin ————— Vestibulocochlear
Girls —————— Glossopharyngeal
Vagina ————————- Vagus 
Ah —————————— Accessory 
Heaven ——————— Hypoglossal

Question 17

Nerve that passes through Olfactory foramina

Answer 17

CN I (Olfactory Nerve)

Question 18

Nerve that passes through Internal Auditory Meatus

Answer 18

CN VII (Facial nerve)
CN VIII (Vestibulocochlear nerve)

Question 19

Nerve that passes through Foramen Rotundum

Answer 19

CN V (Trigeminal nerve)

Question 20

Nerve that passes through Foramen Ovale

Answer 20

CN V (Trigeminal nerve)

Question 21

Nerve that passes through Superior Orbital Fissure

Answer 21

CN III (Oculomotor nerve)
CN IV (Trochlear nerve)
CN V (Trigeminal nerve)
CN VI (Abducens nerve)

Question 22

Nerve that passes through Optic Foramen

Answer 22

CN II (Optic nerve)

Question 23

Nerve that passes through Stylomastoid foramen

Answer 23

CN VII (Facial nerve)

Question 24

Nerve that passes through Jugular foramen

Answer 24

CN IX (Glossopharyngeal nerve)
CN X (Vagus nerve)
CN XI (Accessory nerve)

Question 25

Nerve that passes through Foramen magnum

Answer 25

CN XI (Accessory)

Question 26

Function of CN I (Olfactory nerve)

Answer 26

* smell nerve Orgin: nose Sensory: smell Motor: none

Question 27

Functions of CN II (Optic nerve)

Answer 27

``` *vision nerve Pupil reflex, eyesight Orgin: eye Sensory: vision Motor: none ```

Question 28

Functions of CN III (Oculomotor nerve)

Answer 28

Move eye and pupil reflex Orgin: midbrain Sensory: none Motor: Somatic innervation: extrinsic eye muscles Autonomic innervation: intrinsic eye muscles

Question 29

Functions of CN IV (Trochlear nerve)

Answer 29

Moves eye Orgin: midbrain Sensory: none Motor: extrinsic eye muscle

Question 30

Functions of CN V (Trigeminal nerve)

Answer 30

Teeth clenching, somatic sensation of face Orgin: Pons Sensory: face (somatic) Motor: muscles of mastication (move mandible)

Question 31

Functions of CN VI (Abducens nerve)

Answer 31

Moves eye laterally Orgin: pons Sensory: none Motor: extrinsic eye muscle

Question 32

Functions of CN VII (Facial nerve)

Answer 32

``` Facial expression Orgin: pons Sensory: taste Motor: Somatic - muscles of facial expression Autonomic - salivary glands ```

Question 33

Functions of CN VIII (Vestibulocochlear nerve)

Answer 33

``` 2 branches: - vestibular branch (balance) - cochlear branch (hearing) Orgin: inner ear Sensory: balance, hearing Motor: none ```

Question 34

Functions of CN IX (Glossopharyngeal nerve)

Answer 34

``` Gag reflex, swallowing Orgin: medulla oblongate Sensory: taste, carotids (visceral) Motor: Somatic - pharynx Autonomic - salivary gland ```

Question 35

Functions of CN X (Vagus nerve)

Answer 35

``` Gag reflex, swallowing Orgin: medulla oblongata Sensory: Aorta (visceral) Motor: Somatic - pharynx, larynx Autonomic - thoracic, abdominal organs ```

Question 36

Functions if CN XI (Accessory Nerve)

Answer 36

*technically not a cranial nerve Shrug shoulders, turn head Orgin: spinal cord (C1-C5) Sensory: none Motor: trapezius, sternocleidomastoid muscle

Question 37

Functions of CN XII (Hypoglossal nerve)

Answer 37

Tongue movements Orgin: medulla oblongata Sensory: none Motor: tongue muscles

Question 38

Cranial nerve sensory/motor/both mneumonic

Answer 38

Some say marry money but my brother says big brains matter more

Question 39

Cranial nerves functions mneumonic

Answer 39

Secure Victory Early Ewok, Force Everyone To Help Turn Away The Troopers Smell, Vision, Eyes, Face, Taste, Hearing, Aorta, Trapezius, Tongue