5: Nerves Of The Neck And Larynx

Question 1

Superior vs inferior loop of ansa cervicalis

Answer 1

Superior: from C1
Inferior: from C2 and C3

Question 2

Where is the white rami in the neck

Answer 2

There is none

Question 3

Two options for fibers to pass to cervical spinal nerves in the neck

Answer 3

1. Via gray rami

2. Leave as visceral branches into thorax

Question 4

Locations of the three cervical ganglia

Answer 4

Superior: level of C1-2
Middle: over inferior thyroid A, around C6
Inferior ganglia: level of C7

Question 5

Two places branches from superior cervical ganglion go?

Answer 5

1. Cervical plexus

2. Cardiopulmonary branches

Question 6

Distribution of middle cervical ganglia

Answer 6

Distributed via periarterial plexuses and cardiopulmonary splanchnic N’s

Question 7

Where do fibers go from the inferior cervical ganglion

Answer 7

Brachial plexus, heart, or periarterial plexus of the vertebral A

Question 8

Phrenic nerve relation to anterior scalene

Answer 8

Anterior to anterior scalene

Question 9

Three unpaired laryngeal cartilages

Answer 9

1. Thyroid cartilage
2. Epiglottis
3. Cricoid cartilage

Question 10

Three paired laryngeal cartilages

Answer 10

1. Arytenoid cartilages
2. Corniculate cartilages
3. Cuneiform cartilages

Question 11

Level of thyroid cartilage

Answer 11

C4

Question 12

Epiglottis cartilage type

Answer 12

Elastic cartilage

Question 13

Cricoid cartilage level

Answer 13

C6

Question 14

Function of arytenoid cartilages

Answer 14

Attaches vocal cords

Question 15

Where are the vocal ligaments

Answer 15

Under the vocal cords

Question 16

Vocal folds function

Answer 16

Make sound when air passes by due to elastic vocal ligaments

Question 17

What two things do vocal folds run between?

Answer 17

Thyroid cartilage + arytenoid cartilages

Question 18

How is voice volume determined?

Answer 18

Force of air

Question 19

How is voice pitch determined

Answer 19

Tension of folds

Question 20

What N regulates pitch of voice

Answer 20

CN 10

Question 21

Ventricular folds

Answer 21

False vocal cords, do not contain vocal ligaments

Question 22

What nerves innervate the larynx

Answer 22

All from CN 10: superior laryngeal N, inferior laryngeal N

Question 23

Superior laryngeal N function

Answer 23

Sensory to inner larynx, motor to cricothyroid M

Question 24

Inferior laryngeal N function

Answer 24

Motor to intrinsic laryngeal muscles

Question 25

Two arteries that supply larynx

Answer 25

Superior laryngeal A (from superior thyroid) + inferior laryngeal A (from inferior thyroid)