Anatomy of the larynx-Must know

Question 1

Motor innervation:

what innervates the cricothyroid muscle?

Answer 1

external branch of SLR

Question 2

Motor innervation:

bc it supplies all the muscles of the larynx except the cricothyroid, the _____ nerve is the MAJOR MOTOR NERVE of teh larynx

Answer 2

RLN

Question 3

Motor innervation:

what branch of the SLN is motor?

Answer 3

External (Me)

Question 4

Sensory innervation:

what is the major sensory nerve

Answer 4

INTERNAL branch on the SLN

(Is)

Me= motor external

Is = Internal sensory

Question 5

Sensory innervation:

what nerve supplies the laryngeal tissue from the vocal cords up? (including the VC)

Answer 5

Superior Laryngeal Nerve (SLN)

Question 6

Sensory innervation:

what nerve supplies the sensory innervation to the laryngeal mucosa inferior to the vocal cords?

Answer 6

Recurrent Laryngeal Nerve (RLN)

Question 7

Larynx Innervation:

what does the SLN do?

3 things

Answer 7

Motor external branch ( cricothyroid)

Sensory Internal branch

Sensory for everything from Vocal cords up (vocal cords and epiglottis)

Question 8

Larynx Innervation:

what does the RLN do?

2 main things

Answer 8

Controls sensory below the vocal cords

controlls all muscles except cricothyroid

Question 9

Label the larynx:

where is the thyroid cartilage and what level is it at?

Answer 9

b/t hyoid bone and cricord cartilage

Question 10

Label the larynx:

where is the thyroid bone and what level is it at?

Answer 10

Above thyroid cartilage

C2

Question 11

Label the larynx:

where is the cricoid cartilage and what level is it located at?

Answer 11

below the thyroid cartilage

C6

Question 12

Anatomy 101:

how many cartilagles are there?

Answer 12

9

Question 13

Anatomy 101:

how many paired cartilages are there?

Answer 13

3

Question 14

Anatomy 101:

how many non paired cartilages are there?

Answer 14

3

Question 15

Anatomy 101:

Name the 3 non paired cartilages

Answer 15

epiglottis

thyroid

cricord

Question 16

Anatomy 101:

name the 3 paired cartilages

Answer 16

Cunieform x2

Corniculates x 2

Arytenoids x 2

(in that order from superior to inferior- just know the C’s are first in ABC order then the A)

Question 17

Anatomy 101:

List all of the 9 cartilages of the larynx in order from superior to inferior

Answer 17

Epiglottis Cartilage

Thyroid Cartilage

Conieform Cartilage x 2

Corniculates x 2

Arytenoids x 2

Cricord cartilage

Question 18

Anatomy 101:

what nerve does the right and left RLN branch (or arise) from

Answer 18

Vagus Nerve

Question 19

Anatomy 101:

what cranial nerve is the sensory below the cords

Answer 19

Vagus

Question 20

Intrinsic Laryngeal Muscles:

what is the function of the Posterior Cricoarytenoids

Answer 20

ABducts the cords (dialates the cords)

think: Pulls Cords Away

Posterior CricoArytenoids

Question 21

Intrinsic Laryngeal Muscles:

what is the function of the lateral cricoarytenoid muscles

Answer 21

ADDucts the cords

Question 22

Intrinsic Laryngeal Muscles:

what is the function of the Cricothyroid muscles

Answer 22

Tenses the cords

Question 23

Intrinsic Laryngeal Muscles:

what is the function of the Thyroarytenoid muscles?

Answer 23

Relaxes the cords

Question 24

LOOK at diagram understand

Answer 24

Question 25

what muscles are involved in a laryngospasm

Answer 25

CricoThyroid

Lateral CricoArytenoids

Thyroarytenoids

Think of CAT