Phonation terms and Anatomy
Terms
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- recurrent nerve
- branches from vagus, enters below larynx; motor. Supplies all other muscles in larynx- left branch loops around aorta- difference in length may be reason for vibrato
- tranverse section
- guillotine cut
- longitudinal section
- through medial/lateral plane, shoulder to shoulder
- sagittal section
- through anterior/posterior plane
- smooth
- blood vessels, intestines
- skeletal
- everything else, voluntary but not direct control, striated
- epithethelial tissue
- simple, squamous (pavers), cuboidal,
- vocal tract tissue
- simple ciliated columnar
- nervous tissue
- elongated cells that are highly irritable, provide electro-chemical signals
- motor unit
- nerve cell and all muscles served by that cell
- glottis
- space between the vocal folds
- lamina propria
- covering of the thyroarytenoid muscle that makes up the vocal fold, loosely attached to muscle
- superficial L.P.
- thin top layer, low vicosity
- intermediate L.P.
- med viscosity, medium thickness, contains vocal ligament
- deep L.P.
- thickest, right next to muscle
- epithelium
- outer covering of vocal folds, stratified squamous 4-5 cells deep
- ventricular folds
- false vocal folds, superior to true folds
- larygeal ventricles
- space above vocal folds, create vortices, have goblet cells that provide mucous for v.fs
- thyroarytenoid muscle
- TA; B50intrinsic, from ThCart to AryCart, pulls AryC to ThyC, strands paralell and perpendicular, can shorten and thicken, wedge shaped, controls low pitches/chest voice
- mucosal wave
- when epithelial layer moves independently of inner layers, must happen for phonation
- mucosa
- surface of vocal folds
- oscillation
- happens because of muscular and air flow forces, myoelastic-aerodynamic event