Larynx and Pharynx

Question	Answer
What are the internal pharangeal muscles?	Palatopharyngeus, stylopharangeus, salpingopharyngeus
What is the innervation of stylopharangeus?	Glossopharyngeal nerve (CN IX)
What three muscles make up the external layer of the pharynx?	Superior, middle and inferior pharangeal constrictors
What are the three parts to the pharynx?	Nasopharynx, oropharynx and laryngopharynx
What spinal level does the laryngopharynx lie at?	C4-6
Which is the only part of the pharynx that food doesn't pass?	Nasopharynx -it is shut off by involuntary contraction of the soft palate
Where is the laryngopharynx in relation to the larynx?	Posterior
What is the action of the internal muscle layer of the pharynx?	to elevate the pharynx and larynx during swallowing and speaking
What nerve supplies the cricothyroid muscle?	External laryngeal nerve (CN X) - from the superior laryngeal nerve
What nerve supplies all other muscles of the larynx?	Inferior laryngeal nerve (CN X)- a branch of the recurrent laryngeal nerve
What muscles act to adduct the vocal folds?	Lateral cricoarytenoid and transverse and oblique artytenoids
What muscle acts to abduct the vocal folds?	Posterior crico- arytenoid
What is the action of cricothyroid?	Stretches and tenses the vocal ligament
what is vocalis?	It is the slender muscle slip medial to thyro-arytenoid muscle fibres
What is the function of vocalis?	It relaxes the posterior vocal ligament while maintaining tension of the anterior part

Resource summary

	Created by reynoldslaura about 11 years ago