•Opening muscle :- thyroepiglotticus.
•Closure of larynx:- aryepiglotticus , interarytennoids ,
•Abductor of vocal cords :- posterior cricoarytenoids .
•Adductor of vocal cords :- lateral cricoarytenoids
•Tensor of vocal cords:- cricothyroid
•Relaxer of vocal cords :- thyroarytenoids
•Modulator of vocal cords :- vocalis.
•Safety muscle of larynx :- posterior cricoarytenoids.
{{ Safety muscle of tongue – Genioglossus }} .
•Whispering muscle:- lateral cricoarytenoids
∆Note :-
•All muscle are supplied by recurrent laryngeal nerve , except cricothyroid (supplied by Superior laryngeal nerve)
•All muscles are adductors except posterior cricoarytenoids (is an abductor) .
•vocalis is called a modulator because it’s anterior fibres causes tension of vocal cords and posterior fibres causes relaxation of vocal cords.