SHLD 350 Ch. 6

Also sometimes called Laryngography has become a popular tool for evaluating vocal fold function noninvasively

Electroglottography (EGG)

reflects the surface area of contact of the vocal folds

Lx wave

Duration of closed phase divided by time of entire vibratory cycle

Closed quotient/contact quotient (CQ)

Duration of opening of glottis in relation to entire cycle

Open Quotient (OQ)

Ratio of difference in time between closing and opening phases divided by duration of closed phase

Contact index (CI)

Relative durations of closed and open phases of duty cycle

Close-to-open ratio (C/O ratio)

Ratio of opening-phase duration to closing-phase duration

Speed quotient (SQ)

Used to characterize the aging of the laryngeal mechanism


vocal fold changes resulting from the aging process


Suitable fetal cells are transplanted into the appropriate site in the patient's brain

Fetal cell transplantation (FCT)


Deep brain stimulation (DBS)

slight or partial paralysis, resulting in partial loss of the muscle strength and movement


Surgical technique to position vocal folds close together and reduce glottal insuffiecieny

Medialization thyroplasty

Surgical technique to rotate the arytenoid cartilages to improve glottal closure

Arytenoid adduction

Involuntary spasms of the vocal folds


Procedure in which minute amounts of botuliunum toxin are injected into the vocal folds to alleviate spasms

Botox injection

Wheexzing sound during breathing


person's subjective sensation of difficulty and or discomfort during breathing


Reflux that enters the pharyngeal area and comes into contact with the posterior larynx

laryngopharyngeal reflux (LPR)

Complete removal of the larynx , the individual is not able to produce voice in the normal way

total laryngectomy (TL)

Surgical procedure in which a portion of the larynx is removed

Vertical partial laryngectomy (VPL)