Nervous System

Question 1

What are the 2 anatomical divisions of the nervous system?

Answer 1

1. CNS (brain and spinal cord)

2. PNS (cranial and spinal nerves and sympathetic trunks)

Question 2

What are the 2 functional divisions of the nervous system?

Answer 2

1. Somatic (voluntary)

2. Autonomic (involuntary)

Question 3

Where do cranial nerves arise?

Answer 3

Nuclei found in the brainstem

Question 4

Name CN I

Answer 4

Olfactory

Question 5

Name CN II

Answer 5

Optic

Question 6

Name CN III and describe where it emerges

Answer 6

Oculomotor - Emerges on anterior surface of the brain

Question 7

Name CN IV and describe where it emerges

Answer 7

Trochlear - Leaves posterior surface of brainstem but emerges from midbrain

Question 8

Name CN V and describe where it emerges

Answer 8

Trigeminal - Leaves anterior aspect of lateral side of pons

Question 9

Name CN VI

Answer 9

Abducent

Question 10

Name CN VII

Answer 10

Facial

Question 11

Name CN VIII

Answer 11

Vestibulocochlear

Question 12

Where do CN VI, CN VII and CN VIII emerge?

Answer 12

Groove between lower boarder of pons and the medulla oblongata

Question 13

Name CN IX

Answer 13

Glossopharyngeal

Question 14

Name CN X

Answer 14

Vagus

Question 15

Name CN XI

Answer 15

Accessory

Question 16

Where do CN IX, CN X and cranial part of CN XI emerge?

Answer 16

Anterolateral surface of medulla between the olive and inferior cerebellar peduncle

Question 17

Where does the spinal part of CN XI emerge?

Answer 17

Spinal cord and enters the skull through the foramen magnum

Question 18

Name CN XII and describe where it emerges

Answer 18

Hypoglossal - Emerges from the anterior surface of medulla oblongata between pyramid and olive

Question 19

How does CN I leave the skull?

Answer 19

Cribriform plate

Question 20

How does CN II leave the skull?

Answer 20

Optic canal

Question 21

How does CN V₁ leave the skull?

Answer 21

Superior orbital fissure

Question 22

How does CN V₂ leave the skull?

Answer 22

Foramen rotundum

Question 23

How does CN V₃ leave the skull?

Answer 23

Foramen ovale

Question 24

How does CN III leave the skull?

Answer 24

Superior orbital fissure

Question 25

How does CN IV leave the skull?

Answer 25

Superior orbital fissure

Question 26

How does CN VI leave the skull?

Answer 26

Superior orbital fissure

Question 27

What leaves the skull by the foramen spinosum?

Answer 27

Middle meningeal vessels

Question 28

How does CN VII leave the skull?

Answer 28

Internal acoustic meatus

Question 29

How does CN VIII leave the skull?

Answer 29

Internal acoustic meatus

Question 30

How does CN IX leave the skull?

Answer 30

Jugular foramen

Question 31

How does CN X leave the skull?

Answer 31

Jugular foramen

Question 32

How does CN XI leave the skull?

Answer 32

Jugular foramen

Question 33

How does CN XII leave the skull?

Answer 33

Foramen magnus