Van Pelt F, Ludlow C L, Smith P J
Voice and Speech Section, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD.
Ann Otol Rhinol Laryngol. 1994 Mar;103(3):192-200. doi: 10.1177/000348949410300305.
Patients with adductor and abductor spasmodic dysphonia were compared with normal controls on speech items particularly difficult for the two patient groups. Intrinsic and extrinsic laryngeal muscles were measured during adduction for voicing and for a glottal stop, and during abduction after a vowel and after a glottal stop. Muscle activity was measured while the patients attempted the speech items, with considerable difficulty, but not during periods of complete voice loss. Muscle activity at rest, activity increases for speech, and percent changes for adduction and abduction did not differ from normal in either patient group. The results demonstrated normal muscle activation levels and changes for speech in the patients, and suggested that symptoms occur when spasmodic bursts intrude on an otherwise normal pattern.
对患有内收肌和外展肌痉挛性发音障碍的患者与正常对照组进行了比较，比较内容为对这两组患者而言特别困难的言语项目。在内收时（用于发声和发喉塞音）以及在外展时（在元音后和喉塞音后）测量喉内肌和喉外肌。当患者相当困难地尝试言语项目时测量肌肉活动，但在完全失声期间不进行测量。两组患者静息时的肌肉活动、言语时的活动增加以及内收和外展的百分比变化均与正常情况无异。结果表明患者的肌肉激活水平和言语时的变化正常，并提示当痉挛性爆发干扰原本正常的模式时就会出现症状。
