lecture 4 - head & neck 4 Flashcards
What are the 2 folds formed by the quadrangular membrane?
Aryepiglottic fold, vestibular fold
What fold is formed by the cricothyroid membrane?
vocal fold
What is the name of the gap between the two vocal cords?
Rima glottidis
What is the space within the larynx above the vestibular folds?
Vestibule
What is the function of the cricothyroid muscle?
stretches and tenses vocal cords
What is the function of the thyro-arytenoid muscle?
relaxes vocal fold
What is the function of the lateral crico-arytenoid muscle?
adducts vocal fold (brings folds together)
What is the function of the transverse and oblique arytenoid muscles?
aid in adduction of the vocal cords
What is the function of the aryepiglottic muscle?
narrows entrance to larynx, preventing food from entering
What is the function of the posterior crico-arytenoid muscle?
abducts vocal folds
What is the nerve supply for the intrinsic muscles of the larynx?
Recurrent laryngeal nerve for all except cricothyroid (external laryngeal)
What is the nerve supply to the mucous lining of the larynx above the vocal cords?
Internal laryngeal nerve
What is the nerve supply to the mucous lining of the larynx below the vocal cords?
Recurrent laryngeal nerve
What cranial nerve branches into the laryngeal nerves?
Vagus nerve
Where does the left recurrent laryngeal nerve originate?
The thorax
Where does the right recurrent laryngeal nerve originate?
root of the neck
Which muscles form the floor of the mouth?
Mylohyoid
What nerve supplies the mylohyoid muscle?
Mylohyoid nerve, a branch of the inferior alveolar nerve of V3
What is the innervation of geniohyoid?
C1 via the hypoglossal nerve
How many adult teeth are there?
32
What are the 3 types of teeth?
molar, premolars, incisors
How many deciduous teeth does a child have?
20 total
Which nerve does the lingual nerve arise from?
V3 (mandibular)
Which nerve does the lingual nerve run with?
Chorda tympanii (branch of facial nerve)
What does the lingual nerve supply?
General sensation (not taste) to the mucosa of anterior 2/3 of the tongue and floor of the oral cavity
What does the chorda tympani nerve supply?
taste to anterior 2/3 of tongue, parasympathetic, secretion at submandibular and sublingual glands
What does the inferior alveolar nerve become when it exits the mental foramen?
mental nerve
Where do the greater and lesser palatine nerves enter the mouth?
Through the greater and lesser palatine foramina
What does the greater palatine nerve supply?
sensation to hard palate
What does the lesser palatine nerve supply?
the soft palate
Where does the nasoapalatine nerve enter the hard palate?
via the incisory canal
Where does the maxillary nerve change name to infraorbital nerve?
At the inferior orbital canal/fissure
Which muscle does the glossopharyngeal nerve supply?
The stylopharyngeus
