Journal of Voice最新文献

{"title":"RE: \"Role of Prolonged Intubation in Vocal Fold Motion Impairment in Critically Ill Patients\".","authors":"Hinpetch Daungsupawong, Viroj Wiwanitkit","doi":"10.1016/j.jvoice.2024.07.033","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.07.033","url":null,"abstract":"","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using Office-Based Zero-Degree Rigid Laryngoscopy to Predict Glottic Exposure in Microlaryngoscopy.","authors":"Sunil Sam Varghese, Navneet Kumar, Ashish Varghese","doi":"10.1016/j.jvoice.2024.08.033","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.08.033","url":null,"abstract":"<p><strong>Objectives: </strong>Poor glottic exposure in microlaryngeal surgery can result in difficult instrumentation or incomplete surgery affecting surgical outcomes. Anticipating poor glottic exposure preoperatively allows surgeons to prepare adequately, ensuring successful surgery. This study aims to determine the diagnostic utility of 4-mm zero-degree rigid endoscopic laryngeal examination as a tool to predict glottic exposure in microlaryngoscopy (MLS).</p><p><strong>Study design: </strong>Cross-sectional observational study.</p><p><strong>Methods: </strong>This is a cross-sectional study, conducted from March 1, 2022 to November 30, 2023 at the ENT department of a tertiary care hospital in North India. A total of 35 adult participants who underwent MLS were consecutively enrolled. Participants in whom the lesion was obscuring the anterior commissure and in whom gag reflex prevented complete zero-degree laryngeal examination were excluded from the study. All enrolled participants were evaluated preoperatively with a 4-mm rigid zero-degree laryngoscopic examination and the Laryngoscore. The total score on the Laryngoscore proforma was calculated and recorded. The visualized glottis on zero-degree laryngoscopy was graded as follows: grade 1, anterior commissure and the entire glottic plane can be seen; grade 2, glottis can be seen but not the anterior commissure; grade 3, only the posterior half of the glottis can be seen; grade 4, only the arytenoids can be seen. The glottic exposure on MLS was also assessed using the same grading system. Depending on the exposure of the anterior commissure, the cohort was divided into two groups: good laryngeal exposure and difficult laryngeal exposure. Receiver operating characteristic curve analysis was done to evaluate the predictive accuracy of zero-degree laryngoscopy and to compare it with Laryngoscore.</p><p><strong>Results: </strong>A total of 35 adults participated in the study, of which 28 were men (80%) with a median (range) age of 45 (24-76) years. The area under the curve for zero-degree laryngoscopy and Laryngoscore were 0.97 and 0.83, respectively. The optimal cut-off value (sensitivity, specificity) to identify difficult laryngeal exposure for zero-degree laryngoscopy and Laryngoscore were 1.5 (93.3%, 100%) and 4.5 (80%, 85%), respectively.</p><p><strong>Conclusions: </strong>Zero-degree laryngoscopy is an excellent predictor of glottic exposure on MLS. Its accuracy surpasses that of the Laryngoscore in identifying an ideal candidate for MLS.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating Swallowing Rehabilitation Into Dysphonia Treatment: A Systematic Review and Meta-Analysis of Cross-Therapy Approaches.","authors":"Carlos Calvache, Manuel Gilberto Aguirre Schuette","doi":"10.1016/j.jvoice.2024.07.032","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.07.032","url":null,"abstract":"<p><strong>Background: </strong>Dysphonia, affecting a portion of the global population, poses social and economic burdens. The intricate interplay between phonation and deglutition disorders necessitates innovative therapeutic approaches. Cross-therapy, applying swallowing rehabilitation maneuvers for phonatory improvement, offers potential yet underexplored benefits.</p><p><strong>Objective: </strong>This study aims to evaluate the efficacy and applicability of cross-therapy in managing dysphonia and dysphagia, addressing the existing gap in therapeutic interventions through a comprehensive systematic review and meta-analysis.</p><p><strong>Method: </strong>An exhaustive literature search was conducted across PubMed, Scopus, Web of Science, and Cochrane Library, for studies published between July 2013 and July 2023. The selection criteria focused on studies exploring the use of swallowing maneuvers in phonation rehabilitation, including randomized controlled trials, cohort studies, and observational studies. From the initial 1665 articles identified, 7 met the stringent inclusion criteria for detailed analysis and meta-analysis.</p><p><strong>Results: </strong>The meta-analysis revealed statistically significant improvements in phonatory functions following cross-therapy interventions. Key parameters such as Maximum Phonation Time and Fundamental Frequency showed positive trends post intervention. Despite variability in study designs, participant demographics, and outcome measures, the overall findings support the potential applicability of cross-therapy in clinical settings.</p><p><strong>Conclusions: </strong>Cross-therapy demonstrates promise as an innovative approach for dysphonia management, emphasizing the integration of swallowing maneuvers to enhance voice quality. However, the presence of heterogeneity and potential publication bias necessitates cautious interpretation. Further well-designed research, including high-quality randomized controlled trials, is essential to solidify these preliminary insights and develop standardized treatment protocols.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cepstral Acoustic Measurements: Influence of Speech Task and Degree of Vocal Deviation.","authors":"Samylle Danúbia Leite do Ó, Mara Behlau, Samuel Ribeiro de Abreu, Marina Taborda Englert, Leonardo Wanderley Lopes","doi":"10.1016/j.jvoice.2024.08.027","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.08.027","url":null,"abstract":"<p><strong>Objective: </strong>To analyze whether there are differences in the cepstral measures obtained in different speech tasks, depending on the presence and degree of vocal deviation, and to analyze if there is a correlation between the cepstral measures obtained from different speech tasks and the general degree of vocal deviation.</p><p><strong>Method: </strong>Analysis of 258 vocal samples of the sustained vowel [a] and connected speech (counting numbers) from a database, including 160 dysphonic and 98 nondysphonic voices. The counting number samples were edited in three different durations: counting from 1 to 10, from 1 to 11, and from 1 to 20. Five speech-language pathologists (SLPs), voice specialists, carried out the perceptual-auditory judgment of the overall degree of vocal deviation (ODD) using the G from the overall dysphonia grade, roughness, breathiness, asthenia, and strain (GRBAS) scale. We extracted the cepstral peak prominence (CPP) and smoothed cepstral peak prominence (CPPS) measurements from all the vocal samples using an extraction script in the free software Praat.</p><p><strong>Results: </strong>CPP and CPPS were different between dysphonic and nondysphonic individuals, regardless of the speech task, with lower values for dysphonic. Also, CPP values between the vowel and the connected speech tasks were different between both groups. Only the CPPS showed differences between all the speech tasks depending on the degree of vocal deviation. There was a strong negative correlation between the CPPS_Vowel, CPPS₁₀, CPPS₁₁, CPPS_20, and the ODD, and a moderate negative correlation between CPP_Vowel, CPP₁₀, CPP₁₁, CPP₂₀, and ODD.</p><p><strong>Conclusions: </strong>There are differences in the cepstral measures obtained in different speech tasks, depending on the presence of dysphonia and ODD. CPP and CPPS values are different between dysphonic and nondysphonic individuals in all speech tasks. There is a moderate negative correlation between CCP in the different speech tasks and ODD, while there is a strong negative correlation between CPPS in the different speech tasks and ODD.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifeature Fusion Method with Metaheuristic Optimization for Automated Voice Pathology Detection.","authors":"Erdal Özbay, Feyza Altunbey Özbay, Nima Khodadadi, Farhad Soleimanian Gharehchopogh, Seyedali Mirjalili","doi":"10.1016/j.jvoice.2024.08.018","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.08.018","url":null,"abstract":"<p><p>Voice pathologies occur due to various factors, such as malfunction of the vocal cords. Computerized acoustic examination-based vocal pathology detection is crucial for early diagnosis, efficient follow-up, and improving problematic speech. Different acoustic measurements provide it. Executing this process requires expert monitoring and is not preferred by patients because it is time-consuming and costly. This paper is aimed at detecting metaheuristic-based automatic voice pathology. First, feature maps of 10 common diseases, including cordectomy, dysphonia, front lateral partial resection, contact pachyderma, laryngitis, lukoplakia, pure breath, recurrent laryngeal paralysis, vocal fold polyp, and vox senilis, were obtained from the Zero-Crossing Rate, Root-Mean-Square Energy, and Mel-frequency Cepstral Coefficients using a thousand voice signals from the Saarbruecken Voice Database dataset. Hybridizations of different features obtained from the voices of the same diseases using these three methods were used to increase the model's performance. The Grey Wolf Optimizer (MELGWO) algorithm based on local search, evolutionary operator, and concatenated feature maps derived from various approaches was employed to minimize the number of features, implement the models faster, and produce the best result. The fitness values of the metaheuristic algorithms were then determined using supervised machine learning techniques such as Support Vector Machine (SVM) and K-nearest neighbors. The F1 score, sensitivity, specificity, accuracy, and other assessment criteria were compared with the experimental data. The best accuracy result was achieved with 99.50% from the SVM classifier using the feature maps optimized by the improved MELGWO algorithms.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementation of Eclectic Voice Therapy Program via Telepractice in Hyperfunctional Voice Disorders: A Preliminary Efficacy Study.","authors":"Ranjitha Kashyap Bannur Nanjundaswamy, Thirunavukkarasu Jayakumar, Tumkur Kumaraswamy Prakash","doi":"10.1016/j.jvoice.2024.08.026","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.08.026","url":null,"abstract":"<p><strong>Purpose: </strong>Hyperfunctional voice disorder (HFVD) has a multifaceted origin. Individuals with HFVD work in professions that demand high vocal usage and are bound to work for longer hours with very inflexible work schedules. In consequence, it can be speculated that an eclectic voice therapy program that uses combinatory approaches delivered via telepractice could bring about better efficiency of voice in these individuals. Nevertheless, very less attempts have been made in these lines. Therefore, the present study aims to implement eclectic voice therapy via telepractice and examine the efficacy of the same in HFVD.</p><p><strong>Method: </strong>In total, 10 individuals with HFVD in the age range of 20-55years received Comprehensive Voice Habilitation Program (CVHP), an eclectic voice therapy approach via a videoconferencing platform, Zoom Video Communications, Inc. All the participants completed 15 sessions of voice therapy spread across 3weeks. Stroboscopy examination was performed at the baseline and post therapy to track the changes in laryngeal functions. Further, Consensus Auditory Perceptual Evaluation-Voice (CAPE-V), Acoustic Voice Quality Index (AVQI), and Voice Handicap Index in Kannada (VHI-K) were obtained at the baseline, post therapy, and two follow-ups to report the therapy outcomes. Related-sample Friedman's Two-way Analysis of Variance by Ranks and Wilcoxon Signed Rank Test were used to note the pre-post and follow-up changes in voice outcomes.</p><p><strong>Results: </strong>Significant improvement in movement patterns of the vocal folds and a reduction in ventricular hyperadduction were noted in stroboscopy. CAPE-V and AVQI scores decreased in post-therapy and follow-up evaluations indicating reduction in dysphonia severity over time. Also, decrease in VHI-K scores indicated improved psychosocial aspects and quality of life in HFVD.</p><p><strong>Conclusion: </strong>The current study provided preliminary evidence on the possible benefits of telepractice in the delivery of CVHP in HFVD. Hence, telepractice could be recommended as an alternate treatment modality for patients with HFVD.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toward Sham Interventions for Behavioral Voice Treatment Outcome Research in Female Students Without Dysphonia.","authors":"Youri Maryn, Marie Dedry, Valentine de Mahieu, Julie Fournier-Foch","doi":"10.1016/j.jvoice.2024.08.023","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.08.023","url":null,"abstract":"<p><strong>Objectives/hypothesis: </strong>To develop sham voice treatment techniques to be used in voice treatment outcome research, and to investigate their effectiveness as sham. This entails that the techniques induce no changes in voice or voice physiology, yet still lead to a perception of efficacy.</p><p><strong>Study design: </strong>Prospective randomized blinded controlled study.</p><p><strong>Methods: </strong>Three distinct sham intervention protocols (SIPs) were conceptualized as placebic comparators for three common voice treatment approaches with focus on vocalization (SIP1), respiration (SIP2), and manipulation (SIP3). Forty-eight female students participated in the study. Each participant attended ten 30-minute sessions over 5weeks, including a baseline evaluation, three sessions of one SIP, an inter-SIP voice assessment, three sessions of a second SIP, and a final post-SIP assessment. Auditory-perceptual and instrumental voice evaluations were used as voice treatment outcome measures. The participants' perception of voice-related quality of life was evaluated using the French Voice Handicap Index (VHI_FR). Frequentist as well as Bayesian statistical methods were applied for group comparisons. The effects of combining two SIPs, the potential influence of SIP order, and experimenter/clinician effects, were also investigated.</p><p><strong>Results: </strong>The respiration-based SIP2 showed changes only in sound intensity level on a sustained vowel across the three sham intervention sessions. In contrast, the vocalization-based SIP1 impacted sound intensity level on a sustained vowel, sound intensity level on read text, and maximum phonation time. The manipulation-based SIP3 affected smoothed cepstral peak prominence on read text, Acoustic Voice Quality Index, and Dysphonia Severity Index. SIP2 thus demonstrated the highest alignment with the study's objectives, followed by SIP1 and SIP3. GRBASI ratings revealed no statistical differences for any SIP. VHI_Fr decreased significantly after all three SIPs. Combining the SIPs generally replicated the effects observed when each SIP was used individually. There was no order effect or experimenter/clinician effect on the results.</p><p><strong>Conclusions: </strong>This study demonstrated significant changes in participants' perceived voice quality (measured with VHIFr) across various SIPs, despite minimal impact on objective voice function measures. Further investigation is necessary to establish one or more protocols as genuinely sham interventions.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142156489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vocal Fold Vibratory Dose and Perceived Exertion Responses to the Fluid Interval Test for Voice (FIT-V): A Novel Vocal Loading Task Platform.","authors":"Christopher S Apfelbach, Mary Sandage, Katherine Verdolini Abbott","doi":"10.1016/j.jvoice.2024.08.017","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.08.017","url":null,"abstract":"<p><strong>Introduction: </strong>Vocal loading tasks are often used to study how specific variables influence downstream vocal effort or fatigue. The current study introduces a novel vocal loading task, the Fluid Interval Test for Voice (FIT-V) that combines laryngeal diadochokinesis, intervallic rest and exercise, and fluid back pressure. To assess the differences between this novel task and existing vocal loading tasks, we measured vocal fold vibratory dose and perceived phonatory exertion across three 30-minute task conditions: a control loud oral reading task (LOR), a back pressure-resisted Fluid Interval Test for Voice (FIT-V₅), and an unresisted Fluid Interval Test for Voice (FIT-V₀).</p><p><strong>Methods: </strong>Following a training session, 30 participants completed the three tasks (LOR, FIT-V₀, and FIT-V₅) in counterbalanced order on different days. Vocal fold cycle (Aim 1A) and distance doses (Aim 1B) were collected continuously using a dosimeter. The overall perceived phonatory exertion (Aim 2A) was rated once per minute, while anatomically localized cognitive, laryngeal, thoracic, abdominal, and articulatory exertion (Aim 2B) were rated once at the end of each task. Statistical analyses examined the effects of task and task× time interactions on the dependent variables.</p><p><strong>Results: </strong>The FIT-V₀ and FIT-V₅ tasks imposed smaller vocal fold cycle doses (P < 0.001; Aim 1A) and distance doses (P < 0.001; Aim 1B) than the LOR task while eliciting comparable or greater magnitudes of overall perceived phonatory exertion (P = 0.003; Aim 2A). However, anatomically localized perceived exertion was greater in the abdomen and thorax (P < 0.05) and lesser in the anterior neck (P < 0.05) in the two FIT-V tasks relative to the LOR task (Aim 2B). Absolute forced vital capacity was a significant predictor of most forms of anatomically localized perceived exertion.</p><p><strong>Discussion: </strong>The unresisted FIT-V₀ and the back pressure-resisted FIT-V₅ tasks yielded similar profiles of overall perceived phonatory exertion, despite vocal fold vibratory doses roughly half that of the LOR task. However, the anatomically localized perceived exertion data underscored subtle across-task differences not apparent in the overall ratings, suggesting potentially distinct physiological and perceptual niches for the three task protocols.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integration of Dysphagia Therapy Techniques into Voice Rehabilitation: Design and Content Validation of a Cross-Therapy Protocol.","authors":"Carlos Calvache, Nicolás Castillo-Triana, Fernando Delprado Aguirre, Paola Leguízamo, Sandra Rojas, Pahola Valenzuela, Mónica Morales Piedrahita, Maria Del Pilar Ramirez Ardila, Dalia Vanessa Ballesteros Pérez","doi":"10.1016/j.jvoice.2024.07.024","DOIUrl":"https://doi.org/10.1016/j.jvoice.2024.07.024","url":null,"abstract":"<p><strong>Background: </strong>The intricate relationship between swallowing and phonation, sharing anatomical and physiological substrates, underscores a clinical demand for integrated therapeutic approaches. Existing interventions often address these functions in isolation, overlooking their interconnected dynamics.</p><p><strong>Objective: </strong>To design and validate a cross-therapy protocol incorporating dysphagia therapy techniques (maneuvers/exercises) into voice rehabilitation. This protocol aims to exploit the shared biomechanical components of swallowing and phonation to improve both functions simultaneously in patients with underlying hypofunctional laryngeal pathology.</p><p><strong>Methods: </strong>A descriptive research design was employed, consisting of three phases: a comprehensive literature review and expert discussions in a German seminar format to conceptualize the protocol; detailed analysis and categorization of swallowing maneuvers/exercises; and content validation by a panel of seven experts through a structured evaluation instrument. The process integrated motor learning and exercise physiology principles to ensure the protocol's clinical applicability and theoretical coherence.</p><p><strong>Results: </strong>The developed cross-therapy protocol incorporates four core swallowing therapy techniques to voice therapy procedures. Selected swallowing therapy techniques target laryngeal excursion and vocal fold closure because they are critical components of swallowing and phonation. Expert validation yielded a Content Validity Coefficient exceeding 0.90 for most items, indicating high consensus on the protocol's relevance, clarity, and applicability. Adjustments were made based on feedback, enhancing the protocol's precision and user-friendliness.</p><p><strong>Conclusion: </strong>We present a novel, evidence-based therapy protocol for voice and swallowing difficulties resulting from hypofunctional laryngeal pathology. Its development marks a significant step toward bridging the gap between swallowing and voice therapy. Future empirical studies are needed to assess its effectiveness in clinical settings.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of the Vertical Stiffness Gradient in Cadaveric Human and Excised Canine Larynges.","authors":"Jacob Michaud-Dorko, Gregory R Dion, Charles Farbos de Luzan, Ephraim Gutmark, Liran Oren","doi":"10.1016/j.jvoice.2024.08.011","DOIUrl":"10.1016/j.jvoice.2024.08.011","url":null,"abstract":"<p><p>The elastic properties of the folds govern the characteristics of vocal fold vibrations. This study addresses existing gaps by investigating the Young's modulus along the anterior-posterior direction in excised canine and cadaveric human vocal folds. Micro-indentation testing was conducted on six excised canines and three cadaveric human larynges. Multiple points along the medial glottal wall were indented to determine force-displacement, stress-strain relationships, and Young's modulus as a function of Green's strain. A vertical stiffness gradient was consistently observed in both canine and human samples, with higher stiffness in the inferior aspect compared with the superior aspect. The stiffness increased toward both the anterior and posterior directions from the mid-coronal plane, with a more pronounced increase at the posterior edge. Human vocal folds generally exhibited lower stiffness at low strains but were comparable to canine vocal folds at higher strains. These findings suggest that the canine larynx model is a reasonable representation of the human laryngeal tissues' elastic property trends. This analysis of the vertical stiffness gradient in canine and human vocal folds provides valuable data for improving experimental and numerical models of phonation.</p>","PeriodicalId":49954,"journal":{"name":"Journal of Voice","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142146700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}