Chapter 34 Part 1-

Question 1

2 categories of Nervous system

Answer 1

CNS (central)- brain and spinal cord.

PNS (peripheral) remaining nerves of brain and spinal cord

Question 2

CNS (central)

Answer 2

Reflex arc - short cut in reflex system between the spinal cord and sensory nerve.

Question 3

PNS (peripheral)

Answer 3

3 components:

• spinal nerves
• cranial nerves
• autonomic nervous system

Question 4

Spinal nerves

Answer 4

From spinal cord to periphery

Motor and sensory

Question 5

Pairs of spinal nerves

Answer 5

31: 
Cervical- (neck)-8 
Thoracic- (cheat) 12 
Lumbar- (lower back) 5 
Sacral- (hip) 5 
Coccygeal (tail bone) 1

Question 6

Where do spinal nerves exit

Answer 6

Spinal canal of vertebrae via intervertebral foramen.

Question 7

Never end within the spinal cord do not

Answer 7

Regenerate and damage is usually permanent.

Question 8

Pairs of cranial nerves

Answer 8

12. 
Olfactory
Optic
Oculomotor 
Trochlear 
Trigeminal 
Abducens 
Facial 
Statoacoustic (acoustic) 
Glossopharyngeal 
Vagus 
Accessory 
Hypoglossal

Question 9

Olfactory nerve

Answer 9

Sense of smell

Question 10

Optic nerve

Answer 10

Vision

Question 11

Oculomotor

Answer 11

Supplies the muscles that move the eyes

Question 12

Trochlear

Answer 12

Supplies muscle that moves eye downward/laterally

Question 13

Trigeminal

Answer 13

Supplies teeth, oral cavity, max. Sinus, nasal cavity, and skin to face

Question 14

Abducens

Answer 14

Supplies muscle that moves eye laterally

Question 15

Facial

Answer 15

Muscles of facial expression

Question 16

Statoacoustic

Answer 16

Hearing and balance (equilibrium)

Question 17

Glossopharyngeal

Answer 17

Motor to stylopharyngeous
Sensory to posterior 1/3 of tongue
General sensations- pain, pressure, heat and cold

Question 18

Vagus

Answer 18

Motor to larynx/pharynx

Taste and general sensations from root of tongue/epiglottis

Question 19

Accessory (spinal accessory)

Answer 19

Supplies trapezius and SCM

Question 20

Hypoglossal

Answer 20

Intrinsic/extrinsic muscles of the tongue

Question 21

Visceral sensation

Answer 21

Sensation from viscera (organs) of the body

Question 22

AND (autonomic)

Answer 22

2 parts:

• Sympathetic nervous system “fight or flight”
• parasympathetic “craniosacral outflow”

Question 23

Antagonist

Answer 23

Have opposite actions

Question 24

Sympathetic causes release of

Answer 24

Adrenaline

Question 25

Autonomic is a 2 neuron system

Answer 25

Preganglionic neuron

Postganglionic neuron

Question 26

Ganglion

Answer 26

Accumulation of cell bodies outside the CNS

Question 27

Oral cavity nerves

Answer 27

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

Question 28

Branches of trigeminal

Answer 28

3:
V1- opthalmic
V2- maximally
V3- mandibular

Question 29

V1

Answer 29

3 branches:
Frontal
Lacrimal
Nasociliary

Question 30

Where does V1 leave skull

Answer 30

Via supraorbital fissure

Question 31

Frontal branch of V1

Answer 31

Via supraorbital notch

• Supraorbital nerve-skin above the eye and forehead. (Via supraorbital notch)
• Supra trochlear nerve- skin of upper medial corner of eye

Question 32

Lacrimal branch of V1

Answer 32

Lacrimal gland

Question 33

Nasociliary branch of V1

Answer 33

2 ethmoid branches to nasal cavity.

Infraochlear- medial corner of eye