larynx anatomy

Question 1

describe vocal cords at normal resting position and actions of muscles to cause this?

Answer 1

VC slightly abducted as laryngeal muscles are relaxed

Question 2

describe vocal cords at forced expiration and actions of which muscles cause this?

Answer 2

VC fully abducted as post cricoarytenoid contract

Question 3

describe vocal cords at phonation and actions of which muscles cause this?

Answer 3

VC fully adducted as arytenoids contract

Question 4

describe vocal cords at whispering and actions of which muscles cause this?

Answer 4

VC nearly fully adducted due to lateral cricothyroid

Question 5

what muscles increase the pitch by what action?

Answer 5

cricothyroid via stretching

Question 6

what muscles decrease the pitch by what action?

Answer 6

thyroarytenoid via loosening

Question 7

what cranial nerve innervates all the intrisic muscles of the larynx?

Answer 7

CN X vagus

Question 8

what specific nerve innervates all the intrinsic muscles of the larynx and what is the exception?

Answer 8

inferior laryngeal nerve except cricothyroid which is innervated via the superior branch

Question 9

what muscles cause glottic closure in the cough reflex?

Answer 9

lateral cricothyroids and arytenoids

Question 10

during the cough reflex what other body muscles contract and why?

Answer 10

intercostals to increase thoracic pressure to expel large volume of air to get irritant out

Question 11

what part of vagus nerve innervation are you testing when the patient sips water?

Answer 11

pharynx

Question 12

what part of vagus nerve innervation are you testing when the patient speaks or is hoarse?

Answer 12

larynx

Question 13

what nerves are you testing when the patient coughs?

Answer 13

phrenic and vagus

Question 14

what palate is involved in articulation?

Answer 14

soft

Question 15

what are nasal sounds?

Answer 15

ing n m