Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
55 Cards in this Set
- Front
- Back
3 functions of the phonatory system |
1) protect the airway during & after swallowing 2) generate phonatory source for vowels & voiced sounds 3) build up abdominal pressure for support |
|
laryngeal framework |
consists of: 1 bone, 9 cartilage (3 unpaired, 3 paired), 2 joints, 2 membranes, and cavities (supraglottis space, subglottis space, laryngeal vestibule/ventricle) |
|
where is the larynx located? |
- anterior to neck - anterior to esophagus - superior to trachea - inferior to oral and nasal cavities |
|
intrinsic muscles (broad) |
- abductor, adductors, tensors/relaxers |
|
extrinsic muscles (broad) |
- laryngeal elevators - laryngeal depressors |
|
hyoid bone |
- only "free floating" bone: not connected to any other bone - serves as attachment to many muscles - 3 landmarks: corpus, greater horns, lesser horns |
|
thyroid cartilage |
- largest cartilage of larynx - made of hyaline cartilage - shield like, open in posterior - 3 landmarks: thyroid notch (laryngeal prominence, adams apple), superior horn, inferior horn |
|
cricoid cartilage |
- made up hyaline cartilage - only completely closed cartilage of airway (closed mostly posteriorly) - 2 landmarks: facet for thyroid cartilage & facet for arytenoid cartilage |
|
arytenoid cartilage |
- there's 2, made up hyaline - vocal folds attached to end, so it opens & closes vocal folds - 2 processes: muscular process (posterior) and vocal process (anterior) - sits atop cricoid cartilage |
|
corniculate cartilage |
- theres 2, made up of hyaline - used for structural support |
|
cuneiform cartilage |
- theres 2 - structural support - embedded into aryepiglottic folds (skin, mucous lining) - lateral to corniculate cartilage |
|
epiglottis |
- elastic cartilage - helps protect airway during swallowing - leaf like shape - posterior to hyoid bone and thyroid cartilage |
|
cricothyroid joint |
- allows thyroid cartilage to rock forward and down - lengthens true vocal folds (stretches like rubberbands) - alters pitch |
|
cricoarytenoid joint |
- allows movement of arytenoids - pulls artyenoids together (adducting) or aparting (abducting) -- how we open and close vocal folds - changes position & tension of vocal folds to produce voice - moves artyenoids in 3 dimensions 1) rocking: down & inward toward trachea 2) gliding: medial or lateral 3) rotation: clockwise or counter clockwise |
|
larynx as a tube |
- larynx = tube that connects upper & lower respiratory tracts - quandrangular membrane holds bone and cartilage together (in upper) - conus elasticus holds bone & cartilages (below) - lined with epithelial tissue - tube can constrict to produce disturbance in airflow by moving vocal cords into the air stream |
|
supraglottic spaces |
laryngeal spaces above the true vocal folds - aditus: entryway into larynx - laryngeal vestibule: space between aditus & false vocal folds - laryngeal ventricle: space between true and false vocal folds |
|
glottis |
laryngeal space between true vocal folds |
|
false vocal folds |
- superior to true vocal folds - can be used for screaming or forced holding breath (valsalva) - not used for normal voicing - protects airway |
|
true vocal folds |
- more mobile, moves in bottom-up wavelike motion - inferior to false vocal folds - anterior attachment to the thyroid cartilage - posterior attachment to the vocal process of arytenoid cartilages |
|
subglottic space |
- below true vocal folds - above trachea - contains conus elasticus membrane |
|
Layers of True Vocal Folds |
1) Cover: - thin outer epithelial layer - superficial layer of lamina propria (gelatin) - intermediate layer of lamina propria (soft rubberbands) 2) body: - deep layer of lamina propria (cotton threads) - thyroarytenoid (vocalis) muscle (stiff rubber bands) |
|
intrinsic muscles |
- have both origin & insertion on a laryngeal structure - make fine adjustments to larynx - especially important for voice production - include: 3 adductors, 1 abductor, 2 tensors, 1 relaxer |
|
extrinsic muscles |
- especially important for swallowing (moves larynx out of harm's way) - have one attachment on a laryngeal structure & other attachment on a distant structure - make gross/large movements on larynx (raise or lower) - 5 elevators (suprahyoid), 4 depressors (infrahyoid) |
|
3 adductors |
- transverse interarytenoid - oblique interarytenoid - lateral cricoarytenoid - innervation: CN X Vagus, recurrent laryngeal branch - action: adduct glottis |
|
1 abductor |
- posterior cricoarytenoid - abducts glottis - for termination of phonation or voiceless sounds - origin: posterior of cricoid - insertion: muscular process of arytenoid - innervation: CN X, recurrent laryngeal branch |
|
2 vocal fold tensors |
- cricothyroid - tenses & lengthens TVF - vocalis (medial thryoarytenoid): tenses TVF |
|
1 vocal fold relaxer |
- lateral thyroartenoid - relaxes TVF - pulls arytenoid down & in - origin: thyroid cartilage (near notch) - insertion: muscular process of arytenoid - innervation: CN X vagus, recurrent laryngeal |
|
laryngeal elevators (suprayhyoid) |
- mylohyoid, anterior belly of digastric, posterior belly of digastric, stylohyoid, geniohyoid - all inserted at hyoid bone |
|
mylohyoid |
- floor of mouth - origin: inner surface of mandible - insertion: hyoid bone - innervation: CN 5, trigeminal - moves hyoid up & forward (for swallowing) |
|
anterior belly of digastric |
- origin: inside midline of mandible - insertion: hyoid bone - innervation: CN 5 trigemnal - moves hyoid up & forward |
|
stylohyoid |
- origin: styloid process of temporal bone (toothpick) - insertion: hyoid bone - innervation: CN 7 facial - moves hyoid up & back |
|
anterior belly of digastric |
- origin: inside, midline of mandible - insertion: hyoid bone - innervation: CN 5 trigeminal - moves hyoid up & forward |
|
posterior belly of digastric |
- origin: mastoid process of temporal bone - insertion: hyoid bone - innervation: CN 7, facial - moves hyoid up & back |
|
geniohyoid |
- origin: inside midline of mandible - insertion: hyoid bone - innervation: CN 12, hypoglossal - moves hyoid up & forward |
|
laryngeal depressors (infrahyoid) |
- sternohyoid, sternothyroid, superior belly of omohyoid, inferior belly of omohyoid - no innervation - action: move larynx down |
|
sternohyoid |
- beneath sternocleidomastoid - origin: sternum - insertion: hyoid bone - move larynx down |
|
sternothyroid |
- origin: sternum - insertion: thyroid cartilage (oblique line) - move larynx down |
|
superior and inferior belly of omohyoid |
- origin: scapula - insertion: hyoid bone - move larynx down |
|
most superior to inferior laryngeal elevators |
geniohyoid -> mylohyoid -> anterior belly of digastric |
|
most deep to surface laryngeal depressors |
sternothyroid -> sternohyoid -> omohyoid (next to sternohyoid) -> sternocleidomastoid |
|
phonation |
- "voicing" - occurs when TVF are adducted and vibrate in the upper airway |
|
whispering |
- TVF are slightly adducted to create turbulence in airstream, but not so much as to achieve phonation (not vibrating) |
|
cover of TVF |
- elastic (wants to return to original resting position after moved) - responsible for vibration for phonation - moves bottom up, wavelike motion |
|
minimum airflow pressure required to achieve TVF vibration |
- 3-5 cm h20 flow |
|
bernoulli effect |
- given a constant flow of air, at a point of constriction there will be a decrease in air pressure perpendicular to the flow and an increase in speed of the flow |
|
steps of TVF vibration |
1) inhale 2) exhale & adduct TVF (causes constriction) 3) maintain adduction. Positive subglottal pressure blows open TVF from bottom->up 4) glottis is blown open. airflow increases & pressure decreases 5) negative pressrue causes the TVF to close again, from bottom->up 6) repeat process many times per second to achieve phonation. maintain adduction of TVF |
|
3 phases of phonation |
1) vocal attack: process of adducting TVF into airstream to begin 2) sustained phonation: vibration of TVF while maintained/sustained in adducted position during exhalation "ahhhhh" 3) termination of phonation: process of abducting TVF to open glottis to stop vibration in airstream; required for voiceless sounds and breathing (posterior cricoarytenoid) |
|
3 types of vocal attack in normal speech |
1) breathy vocal attack: onset of exhalation occurs before vocal attack (adduction), whisper & voicing 2) simultaneous vocal attack: onset of exhalation and vocal attack (adduction) occur at the same time 3) glottal attack: vocal attack (adduction) occurs before onset of exhalation |
|
3 modes of of TVF vibration (vocal registers) |
1) modal register/phonation: pattern of phonation used in conversation (speech); most efficient register
2) glottal fry: pattern of phonation extremely low in pitch; sounds rough or crackly; TVF are short/thick, mostly closed (90%) 3) falsetto: pattern of phonation extremely high in pitch; TVF are long/thin and don't contact each other as frequently (10% closed) |
|
2 variations of modal phonation |
1) pressed phonation: medial compression of TVF is increased; results in harsh-sounding voice 2) breathy phonation: inadequate TVF medialization to achieve vibration; results in breathy voice |
|
how do we alter pitch? |
- length of TVF: contraction of cricothyroid muscle lengthens TVF - increased length --> increased pitch - tension in TVF: contraction of vocalis muscle tenses TVF - increased tension -> increased pitch |
|
voice disorer |
when an individual uses the phonatory mechanism in a manner that exceeds its anatomical/physiological capacities |
|
acute laryngitis |
- inflammation of TVF, due to infection or vocal misuse - TVF red and thick - leads to hoarse voice or aphona (no voice) |
|
vocal fold nodules |
- tissue growth on anterior 1/3 of TVF, due to vocal misuse - leads to breathy or hoarse voice |
|
vocal hyperfunction |
- over adduction of TVF - associated with increased laryngeal tension - due to vocal misuse - leads to harsh voice |