Throat Anatomy Flashcards
what are the 3 functions of the larynx?
Respiratory
Protective
Phonation
What happens to the vocal folds during forced inspiration?
Abduction
How does the rima glottidis widen?
contraction of posterior cricoarytenoid causes lateral rotation of the joint
How is the protective function of the larynx achieved?
glottic closure
cough reflex
What is the function of thyroarytenoid muscles?
relax vocal ligament
decreases pitch
What is the function of cricothyroid muscles?
tenses vocal ligament
increases pitch
What is the main innervation of the larynx?
recurrent laryngeal
when does the recurrent laryngeal nerve become the inferior laryngeal nerve?
at the level of the cricothyroid joint
What nerve supplies the mucosa above the vocal folds?
internal laryngeal
what nerve supplies the mucosa below the vocal folds?
inferior laryngeal
what are the 3 phases of swallowing?
oral phase
pharyngeal phase
oesophageal phase
what is involved in the oral phase of swallowing?
mastication
bolus manipulation
labial seal
what is involved in the pharyngeal phase of swallowing?
hyolaryngeal elevation
sequential constrictor relaxation
what is involved in the oesophageal phase of swallowing?
relaxation of oesophageal sphincter
what nerve supplies the masticatory muscles?
CN V3
