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Symptomatic glottic insufficiency (dysphonia, aspiration) which leads to incomplete glottic closure which in turn results in failure to produce proper sound. Age-related vocal fold atrophy leading to glottic insufficiency. [4]
Arytenoid adduction with or without medialization thyroplasty significantly improves quality of life for patients with vocal cord paralysis. Subjective outcome measures of voice quality include the Grade, Roughness, Breathiness, Asthenia, Strain (GBRAS) voice scale, Voice Handicap Index, and closure of the glottic gap.
When assessing the vocal cords, the most common finding in MTD is a posterior glottic gap. [2] Other findings include increased movement of the vocal folds towards one another, and changes in the angles of the vocal fold openings.
The posterior cricoarytenoid muscles, the only muscles that can open the vocal folds, are innervated by this nerve. The recurrent laryngeal nerves are the nerves of the sixth pharyngeal arch. The existence of the recurrent laryngeal nerve was first documented by the physician Galen.
The length of the vocal fold at birth is approximately six to eight millimeters and grows to its adult length of eight to sixteen millimeters by adolescence. The infant vocal fold is half membranous or anterior glottis, and half cartilaginous or posterior glottis. The adult fold is approximately three-fifths membranous and two-fifths cartilaginous.
Laryngotracheal stenosis (Laryngo-: Glottic Stenosis; Subglottic Stenosis; Tracheal: narrowings at different levels of the windpipe) is a more accurate description for this condition when compared, for example to subglottic stenosis which technically only refers to narrowing just below vocal folds or tracheal stenosis.
Vocal cord dysfunction (VCD) is a condition affecting the vocal cords. [1] It is characterized by abnormal closure of the vocal folds, which can result in significant difficulties and distress during breathing, particularly during inhalation. [1] Due to the similarity in symptoms, VCD attacks are often mistaken for asthma attacks or laryngospasms.
Within the posterior part of each aryepiglottic fold exists a cuneiform cartilage which forms a whitish prominence, the cuneiform tubercle. [citation needed] The aryepiglottic folds contain the aryepiglottic muscles. They form the upper borders of the quadrangular membrane, and the lateral borders of the laryngeal inlet. [1]