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Vocal cord nodules are bilaterally symmetrical benign white masses that form at the midpoint of the vocal folds. [1] Although diagnosis involves a physical examination of the head and neck, as well as perceptual voice measures, visualization of the vocal nodules via laryngeal endoscopy remains the primary diagnostic method.
Vocal registration refers to the system of vocal registers within the human voice. A register in the human voice is a particular series of tones, produced in the same vibratory pattern of the vocal folds , and possessing the same quality.
Vocal fold injuries can have a number of causes including chronic overuse, chemical, thermal and mechanical trauma such as smoking, laryngeal cancer, and surgery. Other benign pathological phenomena like polyps, vocal fold nodules and edema will also introduce disordered phonation. [34]
Laryngologists treat disorders of the larynx, including diseases that affects the voice, swallowing, or upper airway. Common conditions addressed by laryngologists include vocal fold nodules and cysts, laryngeal cancer, spasmodic dysphonia, laryngopharyngeal reflux, papillomas, and voice misuse/abuse/overuse syndromes.
Zeitels grew up in New Rochelle, New York.His father and mother, an orthodontist and elementary school teacher, pressed him to take up a career in medicine. At the age of 17, Zeitels was selected to be in the 1st class of Boston University Trustee Scholars, an experimental educational program for gifted teens as well as the Boston University's accelerated six-year medical program.
The free edge of the vibratory portion of the vocal fold, the anterior glottis, is covered with stratified squamous epithelium. This epithelium is five to twenty-five cells thick with the most superficial layer consisting of one to three cells that are lost to abrasion of the vocal folds during the closed phase of vibration.
William Vennard (January 31, 1909 Normal, Illinois – January 10, 1971, Los Angeles, California) was a famous American vocal pedagogist who devoted his life to researching the human voice and its use in singing. He was one of the driving forces behind a major shift within the field of vocal pedagogy during the middle of the 20th century. [1]
Straining the voice can lead the development of vocal nodules, a form of scarring on the vocal cords caused by strenuous or abusive voice practices. Professional singers on extended tours with tight schedules run a substantial risk of damaging their voices unless they make sure to rest the vocal cords and get enough sleep and proper diet. [11] [12]