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The brain coordinates voice production through specific nerve connections and signals Tilts the thyroid cartilage, thus increasing tension of vocal folds.Attached to cricoid and thyroid cartilages.Alters vocal fold tension/relaxation during speaking or singing.Vocalis muscle (derived from inner and deeper fibers of thyroarytenoid msucle] Muscles That Adjust Length and Tension of Vocal Folds o Move arytenoid cartilages so as to move both vocal folds apart, “open” of abduct vocal folds.

Attached to cricoid and arytenoid cartilages.Muscle That Moves Vocal Folds Apart (open glottis) Role in protection of airway during swallowing.These muscles work coordinately to position both vocal folds in the midline for vocal fold vibration during sound production. Attached between right and left arytenoid cartilages.Inter-arytenoid muscle (transverse and oblique).Attached to cricoid and arytenoid cartilage on each side.Lateral cricoarytenoid muscle (R & L muscles).Note: deeper inner fibers referred to as “vocalis muscle” (see below).Action shortens and relaxes vocal ligament.R & L muscles attached to thyroid and arytenoid cartilages on each side.Muscles That Position Vocal Folds in the Midline During Sound Production (close glottis) Voice Box Muscles – Cartilage Attachments, Role, Nerve Input Muscles, Cartilage Attachments, and their Main Roles Voice box muscles are named according to the cartilages to which they are attached. With the cricoid cartilage, forms the cricoarytenoid joint.Connect with the cricoid cartilage at the back of the vocal folds.Pair of small pyramid-shaped cartilages.Becomes taller in the back of the voice box.Vocal folds attach just below the Adam’s apple.Most forward part comprises the “Adam’s apple”.There are three cartilages within the larynx. Voice box adjusts vocal fold tension to vary pitch (how high or low the voice is) and changes in volume (such as loud voice production).Voice box brings both vocal folds to the midline to allow vocal fold vibration during speaking and singing.Role in voice: close glottis and adjust vocal fold tension.Voice box coordinates closing the glottis by bringing both vocal folds to the midline to prevent choking during swallowing.Voice box closes the glottis to build up pressure, then opens it for the forceful expelling of air during cough.Role in cough reflex: close, then open glottis.Voice box brings both vocal folds apart during breathing.The key function of the voice box is to open and close the glottis (the space between the two vocal folds). The vocal tract is comprised of resonators which give a personal quality to the voice, and the modifiers or articulators which form sound into voiced sounds.The voice box (larynx) and vocal folds (sometimes called vocal cords) comprise the vibratory system of the voice mechanism.The ability to produce voice starts with airflow from the lungs, which is coordinated by the action of the diaphragm and abdominal and chest muscles.