larynx muscles

Question 1

what is the only muscle to increase pitch by increasing tension

Answer 1

cricothyroid

Question 2

what is the muscle to decrese pitch?

Answer 2

thyroarytenoid

Question 3

what is the ONLY muscles to ABduct vocal chords?

Answer 3

posterior cricoarytenoid

Question 4

what muscles is associated with phonation?

Answer 4

lateral cricoarytenoid

Question 5

what two muscles aDduct arytenoids closing rims glotus?

Answer 5

transverse arytenoid and oblique arytenoid

Question 6

all laryngeal muscles are innervated by WHAT? exception?

Answer 6

• all innervation originates from vagus

* all muscles are recurrent laryngeal nerve EXCEPT cricothyoroid which is external laryngeal nerve

Question 7

cricothyroid does what?

Answer 7

lengthens vocal fold, pulling them taut

Question 8

posterior cricoarytenoid action?

Answer 8

rotates arytenoid outwardly, aBducting vocal folds (increasing rema space)

Question 9

posterior cricoarytenoid originates?

Answer 9

medial part of posterior cricoid cartilage

Question 10

posterior cricoarytenoid inserts?

Answer 10

muscular process of arytenoid cartilage (spans up laterally)

Question 11

lateral cricoarytenoid actions?

Answer 11

rotates arytenoid inwardly, aDducting vocal folds, *INITIATES sound production =PHONATION

Question 12

lateral cricoarytenoid origin?

Answer 12

lateral aspect over cricoid cartilage

Question 13

lateral cricoarytenoid insertion?

Answer 13

muscular process of arytenoid cartilage

Question 14

transverse and oblique arytenoids action?

Answer 14

work together to slide arytenoids together, aDducting vocal folds
*T is deep to O

Question 15

thyroarytenoid action?

Answer 15

tilts arytenoids anteriorly, relaxing vocal folds (anterior=closer= decrease tension)

Question 16

thyroarytenoid location?

Answer 16

located deep, lateral aspects of vocal folds (completely contained within medial part of thyroid cartilage)
***attaches to anterior inner aspect of thyroid cartilage and goes to cricoid

Question 17

vocalis action

Answer 17

fine tuning of vocal ligament tension

Question 18

superior laryngeal nerve

Answer 18

o comes off vagus

o branches in internal and external laryngeal nerve

Question 19

external laryngeal

Answer 19

motor to the criciothyroid ONLY

Question 20

internal laryngeal

Answer 20

o sensory ONLY above coal fold

o enters hole in thyrohyoid membrane

Question 21

recurrent (inferior) laryngeal

Answer 21

o motor to ALL intrinsic muscles of larynx except criciothyroid
o sensory to below vocal fold