Abduction Lab Report

Voicing When we inhale, air passes into our lungs. Between our pharynx and trachea, each of us have a pair of vocal folds that separate when we do this. This process is called abduction. We use a small intrinsic muscle in our larynx that pulls the vocal folds apart allowing and allows air to move into our lungs. This causes the glottis to open from the back to the front, and the vocal folds wave from the back to the front. The posterior cricoarytenoid muscle is responsible for this abduction process. Originating from a widespread area on either side of the cricoid lamina, (Culbertson & Tanner, 2011) this muscle inserts to a narrow area termed the muscular process of the arytenoid cartilage. The purpose of the cricoarytenoid muscle is to move the arytenoid cartilage so that it assists with the opening of the vocal folds. …show more content…
A French mathematician name Daniel Bernoulli (1700-1782) was able to identify an energy principle to determine how internal pressure and liquid or gas content react. Bernoulli’s principle educates us about how the vocal folds are used for phonation. With the myoelasticity helping the vocal folds to return to a natural resting state, the intrinsic muscles located in the larynx help the folds come together, closing off the glottis. The stream of air and gas being pushed out of the lungs puts pressure against it until the pressure is so intense it is able to force its way out through a narrow opening. The pressure build up creates an increase in flow speed, which in turn produces a suction that helps draw the vocal folds