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At least 199 records · Page 11Linked to original sources
PubMed1980

Electromyographic biofeedback training with patients exhibiting a hyperfunctional voice disorder.

Baseline EMG measures of general laryngeal area muscle tension while speaking and during silence were taken from a group of 21 normal subjects and 7 subjects diagnosed through indirect laryngoscopy as having vocal nodules. In an attempt to reduce their baseline scores, the vocal nodule patients underwent 8 EMG biofeedback training sessions followed by a 2-week follow-up session. Sophisticated listeners then judged the qualities of the voices produced during the base-line and follow-up sessions. Measures of sound pressure levels for the speech samples were also taken to determine their effects on EMG scores. Results of the statistical analyses revealed that significant differences in general laryngeal area muscle tension while speaking and in silence exist between normal and pathological subjects; and that subjects with vocal nodules could significantly reduce these tension levels with EMG biofeedback training. A positive correlation was then found between the EMG measures and the judgments of voice qualities. No correlations were found between EMG measures and sound pressure levels.

Adult↗
PubMed2005

Voice disorders and gastroesophageal reflux.

Gastroesophageal reflux (GER) can cause serious voice problems and laryngopharyngeal disorders influencing the patient's quality of life. Forty-three patients with suspected laryngopharyngeal reflux (LPR) were included into a prospective study. The diagnosis was made on the basis of the patient's history, the videoendolaryngoscopy, the oesophago-gastroscopy and the biopsy of the oesophageal mucosa. All the LPR patients were treated with esomeprasol for eight weeks. An acoustic analysis of the vowel /a/ samples was performed in the LPR group before and after the treatment. Thirty-six patients with vocal fold polyps served as the control group for a subjective estimation of the voice problems. All the patients from both groups subjectively evaluated their voice problems using the Voice Handicap Index (VHI) questionnaire. The results of VHI showed that the severity of the voice problems of the patients with LPR could be compared to that experienced by the patients with vocal fold polyps. Videoendolaryngoscopy and history proved LPR in all 43 patients. Oesophago-gastroscopy combined with the histopathological examination of the oesophageal biopsy specimens detected signs of possible GER in 38 patients (88%). The results of the videoendolaryngoscopy combined with a subjective and objective voice assessment, performed before and after treatment with a proton-pump inhibitor, showed a significant improvement in most of the studied parameters by the end of the therapy. In the diagnostics of LPR, the patient's history and videoendolaryngoscopy demonstrated to be superior to oesophago-gastroscopy. Videoendolaryngoscopic assessment of the laryngeal mucosa, and oesophago-gastroscopy supplemented with a biopsy of the oesophageal mucosa, showed to be a convenient diagnostic method when GER and LPR were suspected. Esomeprasol proved to be very effective in the treatment of LPR. LPR should not be overlooked in the treatment of dysphonic patients.

Adolescent↗
PubMed1978

EMG biofeedback in the treatment of hyperfunctional voice disorders.

In this study, six patients who were judged to produce speech with excessive laryngeal tension participated in 14 30-min biofeedback training sessions. The EMG signal, measured by bipolar surface electrodes placed over the cricothyroid region, was amplified, integrated, and used to control the output of a voltage controlled oscillator (VCO) and a noise generator. A voltage comparator was used as a threshold device. Thus, the noise generator was activated when the EMG activity exceeded the value selected on the comparator, and the VCO was activated when the EMG signal was below threshold. The results demonstrated that three of the subjects reduced the laryngeal EMG activity used during speech production with a concomitant improvement in voice quality. The voice quality of the three remaining subjects was unchanged. Suggestions are made for modifying the equipment and procedures used in this study for routine clinical use of EMG biofeedback.

Action Potentials↗