Test 2 Flashcards
The three stages of phonation
Onset, Sustained Phonation, and Offset
Simultaneous Attack
breath stream starts at as folds adduct
Breathy Attack
breath stream starts before folds adduct
Glottal Attack
breath stream starts after folds adduct
Functions of the Larynx
Nonbiological: sound source
Biological: lifting, expelling foreign objects(coughing), defecation
Hyoid Bone
supports larynx, attaches to tongue, 23 muscles attached to it, unpaired
Arytenoid Cartilages
vocal cords attach to them
2 Laryngeal Joints
cricoarytenoid joint and cricothyroid joint
Cricoarytenoid Joint
primary movement is to rock in and out for adduction/abduction
Cricothyroid Joint
rocks forward to increase tension on vocal folds
Glottis
space between vocal folds
Membranous Portion of Vocal Fold
12-15 mm and portion including free margin
Cartilaginous Portion
7-9 mm and portion bounded by cartilage of arytenoids
Extrinsic Muscles
muscles with one component on the larynx and one outside of the larynx
Intrinsic Muscles
muscles with both origin and insertion within the larynx
Suprahyoid
muscles that insert above the hyoid (elevate the hyoid bone and larynx)
Infrahyoid
muscles that insert below the hyoid (they depress the hyoid bone and larynx)
Extrinsic Muscles of Larynx
thyrohyoid and sternothyroid
Sternohyoid
Extrinsic: depresses hyoid
Omohyoid
Extrinsic: depresses hyoid
Sternothyroid
Extrinsic: depresses thyroid
Thyrohyoid
Extrinsic: depresses hyoid/elevates larynx
Stylohyoid
Extrinsic: Moves hyoid posteriorly
Digastric
Extrinsic: draws hyoid up and forward
Mylohyoid
Extrinsic: elevates hyoid/depresses mandible