Morphological aspects of the euphonic voice

Abstract

Abstract:The high quality of a euphonic voice is the result of complex interactions between many organs and systems. Vibrating vocal folds play a crucial role in this process. Their physiological motion is conditioned by the presence of the layered structure of laryngeal mucosa. In this study, we assessed the degree of dysphonia according to the Union of European Phoniatrics (UEP) scale. Videoendoscopy (VLS) and videostroboscopic (VLSS) examination of the larynx was used to visualize the vibration of the vocal folds. Morphological assessment of the inter-membranous part of the vocal fold mucosa was carried out using material collected after surgical treatment (60%) or obtained from autopsy (40%). The samples were examined by light microscopy and transmission electron microscopy. In euphonic voices, 1° of dysphonia (UEP) and the physiological endoscopic (VLS) and stroboscopic (VLSS) findings of vocal folds were registered. No morphological or ultramorphological changes were observed in the cells of the multilayered flat epithelium, basal membrane or in the stroma. Unchanged epithelial cells were situated on the basal membrane with folds. Moreover, numerous pericytes, vessels with multiplication of basal membranes, scanty collagenous fibers, plasmatic cells and lymphocytes were seen. Morphological changes with signs of atrophy and polypoid degeneration of the vocal fold mucosa were found in only 3 (15%) patients.

Voice disorder in systemic lupus erythematosus

“…Vocal recordings and spectrograms of representative individuals are shown in Fig 1 . Recordings from control subjects ( Fig 1A1 and 1B1 ) showed standard features of euphonic voice, including low waveform variability and high periodic amplitude modulation, as well as spectrograms ( Fig 1C1 ) with well-defined formant frequencies and low noise [ 6 , 19 ]. In contrast, vocal signals from SLE subjects showed reduced amplitude and high variability ( Fig 2A2 and 2B2 ), in addition to spectrograms with high noise and dampened formant frequencies ( Fig 1C2 ).…”

Effect of Cochlear Implantation on Voice Quality in Patients with Hearing Impairment

“…Another study by Kosztyła-Hojna et al [42] examined 21 adults with prelingual or post-lingual deafness. Before receiving a CI, the subjects showed a disturbed motorial function of the articulation organs and errors in articulation of vowels and consonants.…”

Gefäßveränderungen der Stimmlippen – Teil 1: Horizontale Gefäßveränderungen

“…Vaskuläre Läsionen der Stimmlippen sind zudem Ursache für weitere, sekundäre Dysphonien. Da Polypen sowohl uni-als auch bilateral auftreten können, stören sie das Schwingungsverhalten der Stimmlippen und den Stimmmlippenschluss teilweise stark [ 14 ] , bei geringer Ausprägung kön-nen sie akustisch auch unauff ällig sein [ 45 ] . Fortgeschrittene Gefäßveränderungen, wie Varizen, Hämorrhagien und Polypen der Stimmlippen, behindern die Abrollbewegung der Schleimhaut jedoch relativ stark, zum einen wegen der Masseeff ekte, aber auch wegen der zerstörten vaskulärer Struktur der obersten Schicht der Lamina propria.…”