Upper Respiratory Tract and Ear Flashcards Preview

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Flashcards in Upper Respiratory Tract and Ear Deck (35):

What are the five major cartilages that make up the larynx?

- circoid, thyroid, epiglottis, and (paired) arytenoids


What is the wide, posterior part of the cricoid cartilage called?

- the lamina of the cricoid


What is each side of the thyroid cartilage known as?

- the lamina of the thyroid cartilage


What projects forward from each arytenoid cartilage? What about laterally?

- forward: each has a vocal process
- lateral: each has a muscular process


the arytenoids articulate with the cricoid via _______; the thyroid cartilage articulates with the cricoid via _______; these 4 joints are ____________ and are all cartilage-to-cartilage joints.

- circoarytenoid pivot joints (each arytenoid has one)
- cricothyroid joints (2 of these)
- all 4 are true synovial joints


The cricothyroid muscles do what?

- they tilt the thyroid cartilage forwards on the cricoid, tensing the vocal cords


Which muscles are found on the posterior of the cricoid cartilage? What do they do?

- the two posterior cricoarytenoid muscles
- they pull in the arytenoids' muscular processes, causing abduction of the vocal cords


What are the ONLY abductors of the vocal cords?

- the posterior cricoarytenoid muscles


What do the lateral cricoarytenoid muscles do?

- they adduct the vocal cords


What is the band of muscle that runs between the arytenoids? What does it do?

- the transverse arytenoid muscle
- it pulls the two arytenoids together, adducting the vocal cords


What encloses the epiglottis?

- a mucous membrane known as the aryepiglottis folds


Which muscles run along each side of the aryepiglottis folds (superficial to the membrane)? What do they do?

- the aryepiglottic muscles
- they pull the epiglottis closed, closing the laryngeal inlet (the aditus)


What is the opening/inlet of the larynx called?

- the (laryngeal) aditus


All of the larynx's muscles except for the _________ are supplied by which nerve?

- the recurrent laryngeal nerve is the motor supply of all the muscles except for the cricothyroid muscles


The recurrent laryngeal nerve is a branch of which nerve?

- the vagus nerve


The cricothyroid muscles get their motor supply from which nerve? What does it branch from?

- the external laryngeal nerve
- it is also a branch of the vagus nerve


The recurrent laryngeal nerve provides sensation to the larynx ABOVE/BELOW the vocal folds.

- BELOW this level
- (don't forget this nerve is also the motor supply for all the muscles except the cricothyroid muscles)


Which nerve provides sensation to the larynx above the level of the vocal folds?

- the inernal laryngeal nerve
- (it is also a branch of the vagus nerve)


What are the three regions of the pharynx?

- the nasopharynx, oropharynx, and laryngopharynx


The palatine tonsils are located between which two folds of mucosa?

- between the palatoglossal arch (anterior) and the palatopharyngeal arch (posterior) in the nasopharynx and underneath the soft palate


What is found close to the opening of each eustachian tube in the nasopharynx of children?

- the nasopharyngeal tonisls (AKA the adenoids)


Which five bones have the air-containing sinuses (the paranasal air sinuses)?

- the maxilla (x2), the frontal, the ethmoid, and the sphenoid bones


How do the paranasal air sinuses communicate with the nasopharynx?

- via openings called ostia


What do we mean when we call the ears "vestibulocochlear" organs?

- it means they are involved in both hearing and equilibrium


What comprises the external ear?

- the auricle (w/ helix and tragus), the external acoustic meatus, and the tympanic membrane (which separates the external and middle ears)


What comprises the middle ear?

- the three auditory ossicles in the tympanic cavity
- it is filled with air
- this is where the eustachian opens into


What comprises the inner ear?

- the labyrinth (consists of the cochlea and semicircular canals)
- it is filled with fluid


What are the three auditory ossicles?

- the malleus, incus, and stapes


Tensor Tympani

- muscle attached to the handle of the malleus in the middle ear
- dampens loud sounds


Which muscle attaches to the stapes and helps dampen loud sounds?

- the stapedius


T or F: the trigeminal nerve (cranial nerve V) supplies both the tensor tympani and stapedius muscles in the middle ear.

- false!
- the trigeminal supplies the tensor tympani, but the facial nerve (cranial nerve VII) supplies the stapedius


The oval window (also known as ________ ) lies ABOVE/BELOW the round window (also known as ________ )

- oval window: fenestra vestibuli
- round window: fenestra cochleae
- oval window lies above the round window


The floor of the middle ear (tympanic cavity) lies directly above the:

- jugular foramen
- (this is why we can hear blood flow when our ear is lying on a pillow at night)


What part of the malleus connects to the tympanic membrane?

- the handle


What part of the stapes connects to the oval window?

- the footplate/base