Exploring the mechanics of fundamental frequency variation during phonation onset

Serry, Mohamed A.; Stepp, Cara E.; Peterson, Sean D.

doi:10.1007/s10237-022-01652-8

Cited by 3 publications

(3 citation statements)

References 77 publications

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“…Finally, although supraglottic compression was assessed in this study, vocal fold configurations were not analyzed. Previous work has suggested an effect of the paralaryngeal muscles on vocal fold configurations, 7 and as such, relationships between vocal fold configuration and paralaryngeal muscle patterns also require elucidation in future investigations with optical flow methods at both modal pitch and pitch changes.…”

Section: Discussionmentioning

confidence: 99%

“…The paralaryngeal muscles (also known as “extrinsic laryngeal muscles”—although technically only the thyrohyoid and sternothyroid muscles attach directly to the larynx) stabilize and support the larynx, are active during airway protection (swallowing), 4 and may be involved in pitch control 5,6 . However, the role of the paralaryngeal muscles for vocal production are not well understood, 7,8 and their contributions to vocal hyperfunction and dysfunction is even less well supported 2,9,10 . There is a long‐standing theory that increased vocal effort, fatigue, and discomfort patients with pMTD commonly experience with voice use is the byproduct of hyperfunction in these paralaryngeal muscles 11–13 .…”

Section: Introductionmentioning

confidence: 99%

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Optical Flow Analysis of Paralaryngeal Muscle Movement

Morrison,

Fetzer,

Patterson‐Lachowicz

et al. 2023

The Laryngoscope

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ObjectivesThe paralaryngeal muscles are thought to be hyperfunctional with phonation in patients with primary muscle tension dysphonia (pMTD). However, objective, quantitative tools to assess paralaryngeal movement patterns lack. The objectives of this study were to (1) validate the use of optical flow to characterize paralaryngeal movement patterns with phonation, (2) characterize phonatory optical flow velocities and variability of the paralaryngeal muscles before and after a vocal load challenge, and (3) compare phonatory optical flow measures to standard laryngoscopic, acoustic, and self‐perceptual assessments.MethodsPhonatory movement velocities and variability of the paralaryngeal muscles at vocal onsets and offsets were quantified from ultrasound videos and optical flow methods across 42 subjects with and without a diagnosis of pMTD, before and after a vocal load challenge. Severity of laryngoscopic mediolateral supraglottic compression, acoustic perturbation, and ratings of vocal effort and discomfort were also obtained at both time points.ResultsThere were no significant differences in optical flow measures of the paralaryngeal muscles with phonation between patients with pMTD and controls. Patients with pMTD had significantly more supraglottic compression, higher acoustic perturbations, and higher vocal effort and vocal tract discomfort ratings. Vocal load had a significant effect on vocal effort and discomfort but not on supraglottic compression, acoustics, or optical flow measures of the paralaryngeal muscles.ConclusionOptical flow methods can be used to study paralaryngeal muscle movement velocity and variability patterns during vocal productions, although the role of the paralaryngeal in pMTD diagnostics (e.g., vocal hyperfunction) remains suspect.Level of Evidence2 Laryngoscope, 2023

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optical Flow Analysis of Paralaryngeal Muscle Movement

Morrison,

Fetzer,

Patterson‐Lachowicz

et al. 2023

The Laryngoscope

View full text Add to dashboard Cite

show abstract

“…Stepp et al, 2010 [2], also hypothesized that the presence of VH would limit the relative increase in laryngeal muscle tension that typically occurs in the vowel following a voiceless consonant, which would also cause a decrease in RFF onset compared with controls. Studying the mechanics of fundamental frequency variation during the phonation onset, Stepp et al [30] conclude that muscle activation is necessary to produce the observed decay in fundamental frequency evident in vowels preceded by voiceless consonants, and that this is due, in part, to a concomitant decrease in cricothyroid muscle activation during the onset. Competing mechanisms of muscle activation and collision may result in a frequency pattern that initially increases and then decreases.…”

Section: Mtd Groupmentioning

confidence: 99%

Relative Fundamental Frequency: Only for Hyperfunctional Voices? A Pilot Study

Ferrán,

Rodríguez-Zanetti,

Garaycochea

et al. 2024

Bioengineering

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(1) Background: Assessing phonatory disorders due to laryngeal biomechanical alterations requires aerodynamic analysis, assessing subglottic pressure, transglottic flow, and laryngeal resistance. This study explores whether the acoustic parameter, the relative fundamental frequency (RFF), can be studied using the current acoustic analysis protocol at the University of Navarra’s voice laboratory and its association with pathologies linked to laryngeal biomechanical alterations. (2) Methods: A retrospective cohort study included patients diagnosed with muscular tension dysphonia, organic lesions of the vocal fold, and vocal fold paralysis (VFP) at the Clínica Universidad de Navarra from 2019 to 2021. Each patient underwent endoscopic laryngeal exploration, followed by acoustic study, RFF calculation, and an aerodynamic study. Additionally, a control group was recruited. (3) Results: 79 patients and 22 controls were studied. Two-way ANOVA showed significant effects for groups and cycles in offset and onset cycles. Statistically significant differences were observed in cycle 1 onset among all groups and in cycles 1 and 2 between the control group and non-healthy groups. (4) Conclusions: RFF is a valuable indicator of phonatory biomechanics, distinguishing healthy and pathological voices and different disorders. RFF in onset cycles offers a cost-effective, accurate method for assessing biomechanical disorders without complex aerodynamic analyses. This study describes RFF values in VFP for the first time, revealing differences regardless of aerodynamic patterns.

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