Chap 8: Nervous System (Cranial Nerves)

Question 1

12 CRANIAL NERVES

Answer 1

Olfactory (I)
Optic (II)
Oculomotor (III)
Trochlear (IV)
Trigeminal (V)
Abducens (VI)
Facial (VII)
Vestibulocochlear (VIII)
Glossopharyngeal (IX)
Vagus (X)
Accessory (XI)
Hypoglossal (XII)

Question 2

nuclei deep in the brain stem

Answer 2

Motor (efferent)

Question 3

first order nuclei outside the brainstem

Answer 3

Sensory (afferent)

Question 4

Transmit and relay information to and from the
brain

Answer 4

CRANIAL NERVES

Question 5

Which nerves are connected diretly to Cerebrum or Diencephalon?

Answer 5

CN I and CN II

Question 6

connected to the spinal cord

Answer 6

Cranial nerves (XI)

Question 7

contain action-potentials to the CNS

Answer 7

Propioceptive sensory fibers

Question 8

how many olfactory nerves on each side of the brain

Answer 8

9-15

Question 9

Include the special senses (ex. Vision) and
the general senses (ex. Touch and pain)

Answer 9

SENSORY FUNCTIONS

Question 10

Involve the control of skeletal muscles
through motor neurons.

Answer 10

SOMATIC MOTOR FUNCTIONS

Question 11

Involve the regulation of glands, smooth
muscles, and cardiac muscle.

Answer 11

PARASYMPATHETIC FUNCTIONS

Question 12

I: Olfactory

Answer 12

Sensory: sense of smell

Question 13

II: Optic

Answer 13

Sensory: sense of vision

Question 14

III: Oculomotor

Answer 14

Motor: eye movements
- superior
- medial
- inferior rectus
- inferior
oblique

Parasympathetic: Pupillary
constriction

Question 15

IV: Trochlear

Answer 15

Motor: Motor to one eye muscle
- superior oblique

Question 16

V: Trigeminal

Answer 16

Sensory: Chewing and sensation

Question 17

VI: Abducens

Answer 17

Motor: Motor to one eye muscle
- lateral rectus

Question 18

VII: Facial

Answer 18

Sensory: taste

Motor: muscles of facial expression

Parasympathetic: glands in the mouth

Question 19

VIII: Vestibulocochlear

Answer 19

Sensory: hearing and balance

Question 20

IX: Glossopharyngeal

Answer 20

Sensory: taste, tactile sensation

Motor: Pharyngeal muscle

Parasympathetic: parotid salivary gland

Question 21

X: Vagus

Answer 21

Sensory: sense of taste

Motor: soft palate, pharynx and tongue muscles

Parasympathetic: thoracic and abdominal viscera

Question 22

XI: Accesory nerve

Answer 22

Motor: sternocleidomastoid and
trapezius

Question 23

XII: Hypoglossal nerve

Answer 23

Motor: tongue and throat muscles

Question 24

the axons of the optic nerve are myelinated by

Answer 24

Oligodendrocytes

Question 25

When the fibers have passed the optic chiasma

Answer 25

optic tract

Question 26

which CNs control eye movement

Answer 26

CN III, IV and VI

Question 27

Extra ocular muscles: CN III

Answer 27

• superior
• medial
• inferior rectus
• inferior oblique

Question 28

Extra ocular muscles: CN IV

Answer 28

superior oblique

Question 29

Extra ocular muscles: CN VI

Answer 29

lateral rectus

Question 30

has the greatest sensory functions

Answer 30

CN V: Trigeminal Nerve