Surface EMG and Related Measures in Normal and Vocally Hyperfunctional Speakers

Abstract

Surface electromyographic (EMG) signals were detected from the laryngeal area of 7 normal and 7 vocally hyperfunctional speakers during rest, two resisted-force maneuvers, vowel production, and connected speech. Vowel fundamental frequency, absolute and relative period perturbation, laryngeal-palpation ratings, and harshness ratings were acquired as well. The two groups differed significantly on all EMG measures except those associated with the resisted-force maneuvers, the vowel EMG-to-rest EMG ratio, and the speech EMG-to-rest EMG ratio. Moderately high correlations were evident between selected clinical measures and speech EMG values.

Effectiveness of the Computed Analysis of Electroglottographic Signals in Muscle Tension Dysphonia

“…We speculate that this might be due to abnormal contractions of the intrinsic or extrinsic laryngeal muscles [18]. Hyperfunctional speakers show higher values in surface electromyographic measures in comparison with normal speakers [19]. Roy and Leeper [20] and Roy et al [21] described that the manual laryngeal musculoskeletal tension reduction technique reduced cervical muscular tension and improved voice quality in MTD participants.…”

Laryngeal manual therapy palpatory evaluation scale: A preliminary study to examine its usefulness in diagnosis of occupational dysphonia

“…However, Kooijman et al [8] reported high correlation of the results of Lieberman palpatory method and the Voice Handicap Index score. Additionally, Redenbaugh and Reich [25] presented moderately high correlations between palpation and sEMG (surface electromyography). Similarly, in our study a direct positive relationship has been demonstrated between results of the LMTPE scale and the VHI questionnaire, perceptual voice assessment (GRBAS scale) and objective parameters of maximum phonation time.…”

Incomplete Swallowing and Retracted Tongue Maneuvers for Electromyographic Signal Normalization of the Extrinsic Muscles of the Larynx

“…1 In speech and language pathology, the SEMG has been much more used in researches about chewing, swallowing, and alterations of language, that is, stuttering, for investigation of various muscular groups. [2][3][4] Suprahyoid (SH) and infrahyoid (IH) extrinsic muscles, as in normal phonation as in dysphonia cases, may be investigated using this procedure, but researches are few and hard to compare because the technique, size sample, and muscle groups used are different among papers. 2,3,[5][6][7][8] In EA evaluation by SEMG, a reference pattern of muscular contraction is used, entitled normalization signal, used to reduce inter-and intrasubject variability.…”

“…[2][3][4] Suprahyoid (SH) and infrahyoid (IH) extrinsic muscles, as in normal phonation as in dysphonia cases, may be investigated using this procedure, but researches are few and hard to compare because the technique, size sample, and muscle groups used are different among papers. 2,3,[5][6][7][8] In EA evaluation by SEMG, a reference pattern of muscular contraction is used, entitled normalization signal, used to reduce inter-and intrasubject variability. There are several possibilities of normalization signal, by the maximum peak of the EA as well as by the maximum voluntary isometric contraction (MVIC), referential demanding the measurement of determined applied load, such as resistance of the studied muscle.…”