Published research on spasmodic dysphonia and related voice conditions has accelerated over the last few years

This page includes links to articles, literature, research papers and studies published in various locations.  Most full research articles will require a fee to access the full content. While we try to include all research as it becomes available, there may be some that we missed.

Topics include:


Neurological Studies on Spasmodic Dysphonia

2019 – Atypical somatosensory-motor cortical response during vowel vocalization in spasmodic dysphonia

2018-Connectivity profiles of the insular network for speech control in healthy individuals and patients with spasmodic dysphonia

2018-Central Voice Production and Pathophysiology of Spasmodic Dysphonia

2018-Phenomenology, genetics, and CNS network abnormalities in laryngeal dystonia: A 30-year experience

2017-Phenotype- and Genotype-Specific Structural Alterations in Spasmodic Dysphonia

2017-Neural correlates of dystonic tremor: A multimodal study of voice tremor in spasmodic dysphonia

2017-Connectome-Wide Phenotypical and Genotypical Associations in Focal Dystonia

2017-Brain Activity in Patients With Adductor Spasmodic Dysphonia Detected by Functional Magnetic Resonance Imaging.

2017-Central voice production and pathophysiology of spasmodic dysphonia

2017-Phenotype- and genotype-specific structural alterations in spasmodic dysphonia.

2017-Spasmodic Dysphonia: A Review. Part 1: Pathogenic Factors

2017-Spasmodic Dysphonia: A Review. Part 2: Characterization of Pathophysiology

2016-Cortical sensorimotor alterations classify clinical phenotype and putative genotype of spasmodic dysphonia.

2016-Brain structural changes in spasmodic dysphonia: A multimodal magnetic resonance imaging study.

2016-Cortical Silent Period Reveals Differences Between Adductor Spasmodic Dysphonia and Muscle Tension Dysphonia

2015-Neural correlates of abnormal sensory discrimination in laryngeal dystonia

2014-Brain activity related to phonation in young patients with adductor spasmodic dysphonia

2014-Shortened cortical silent period in adductor spasmodic dysphonia: Evidence for widespread cortical excitability

2013-Abnormal Striatal Dopaminergic Neurotransmission during Rest and Task Production in Spasmodic Dysphonia

2011-Spasmodic Dysphonia: a Laryngeal Control Disorder Specific to Speech

2010-Abnormal Activation of the Primary Somatosensory Cortex in Spasmodic Dysphonia: An fMRI Study

2009-Brainstem pathology in spasmodic dysphonia

2009-Research priorities in spasmodic dysphonia

2008-Focal white matter changes in spasmodic dysphonia: a combined diffusion tensor imaging and neuropathological study

2001-Cortical dysfunction of the supplementary motor area in a spasmodic dysphonia patient

1989-Spasmodic Dysphonia, Whether and Where


Spasmodic Dystonia Diagnosis and Other Considerations

2019-The extrinsic risk and its association with neural alterations in spasmodic dysphonia

2019-Defining differences in patient characteristics between spasmodic dysphonia and laryngeal tremor.

2019-Laboratory Evaluation of Spasmodic Dysphonia

2019-Reliability of High-speed Videoendoscopic Ratings of Essential Voice Tremor and Adductor Spasmodic Dysphonia

2018-Consensus-Based Attributes for Identifying Patients With Spasmodic Dysphonia and Other Voice Disorders

2018-Voice deviation, dysphonia risk screening and quality of life in individuals with various laryngeal diagnoses

2018-Vibratory Onset of Adductor Spasmodic Dysphonia and Muscle Tension Dysphonia: A High-Speed Video Study

2018-Outcome Measurement in the Treatment of Spasmodic Dysphonia: A Systematic Review of the Literature

2018-Reliability and Validity of Speech Evaluation in Adductor Spasmodic Dysphonia

2017-Adductor focal laryngeal Dystonia: correlation between clinicians’ ratings and subjects’ perception of Dysphonia

2017-Phenomenology, genetics, and CNS network abnormalities in laryngeal dystonia: A 30‐year experience

2017-Speech–Language Pathology Evaluation and Management of Hyperkinetic Disorders Affecting Speech and Swallowing Function

2017-Voice-Related Patient-Reported Outcome Measures: A Systematic Review of Instrument Development and Validation

2016-Behavior Assessment Battery: A Pilot Study of the Affective, Behavioral, and Cognitive Correlates Surrounding Spasmodic Dysphonia

2016-Factors Associated With Patient-perceived Hoarseness in Spasmodic Dysphonia Patients

2016-Validation of the Cepstral Spectral Index of Dysphonia (CSID) as a Screening Tool for Voice Disorders: Development of Clinical Cutoff Scores

2016-A Measure of the Auditory-perceptual Quality of Strain from Electroglottographic Analysis of Continuous Dysphonic Speech: Application to Adductor Spasmodic Dysphonia

2015-Diagnostic Delays in Spasmodic Dysphonia: A Call for Clinician Education

2014-Spasmodic dysphonia: let’s look at that again.

2014-Automated acoustic analysis of task dependency in adductor spasmodic dysphonia versus muscle tension dysphonia

2014-Influence of Consonant Voicing Characteristics on Sentence Production in Abductor Versus Adductor Spasmodic Dysphonia

2011-Differential vibratory characteristics of adductor spasmodic dysphonia and muscle tension dysphonia on high-speed digital imaging.

2010-Differential diagnosis of muscle tension dysphonia and adductor spasmodic dysphonia using spectral moments of the long-term average spectrum. 

2010-Current practices in the management of adductor spasmodic dysphonia

2009-Differentiating between adductor and abductor spasmodic dysphonia using airflow interruption

2009-Spasmodic dysphonia, perceptual and acoustic analysis: presenting new diagnostic tools

2007-Toward improved differential diagnosis of adductor spasmodic dysphonia and muscle tension dysphonia.


Botulinum Neurotoxin

2019-Unilateral vs bilateral botulinum toxin injections in adductor spasmodic dysphonia in a large cohort

2018-Quality of Life and Voice Changes After a Single Injection in Patients With ADSD Over Time

2018-OnabotulinumtoxinA for adductor spasmodic dysphonia (ADSD): Functional results and the role of dosage

2018-Outcomes of Onabotulinum Toxin A Treatment for Adductor Spasmodic Dysphonia and Laryngeal Tremor

2017-Chemodenervation of the Larynx

2017-Liquid-type Botulinum Toxin Type A in Adductor Spasmodic Dysphonia: A Prospective Pilot Study

2017-Vocal Parameters and Self-Perception in Individuals With Adductor Spasmodic Dysphonia

2017-Botulinum Toxin Dosing Trends in Spasmodic Dysphonia Over a 20-year Period 

2017-Botulinum Toxin-A Dosing Trends for Adductor Spasmodic Dysphonia at a Single Institution Over 10 Years

2017-Liquid-type Botulinum Toxin Type A in Adductor Spasmodic Dysphonia: A Prospective Pilot Study

2017-Effect of Botulinum Toxin and Surgery among Spasmodic Dysphonia Patients

2017-Gender differences in onabotulinum toxin A dosing for adductor spasmodic dysphonia

2015-Factors influencing botulinum toxin dose instability in spasmodic dysphonia patients

2015-Factors Influencing Botulinum Toxin Dose Instability in Spasmodic Dysphonia Patients

2014-Differences in botulinum toxin dosing between patients with adductor spasmodic dysphonia and essential voice tremor

2014-Spasmodic dysphonia: a seven-year audit of dose titration and demographics in the Indian population

2014-Relationship of laryngeal botulinum toxin dosage to patient age, vitality, and socioeconomic issues

2014-Treatment efficacy of electromyography versus fiberscopy-guided botulinum toxin injection in adductor spasmodic dysphonia patients: a prospective comparative study

2013-Considerations for initial dosing of botulinum toxin in treatment of adductor spasmodic dysphonia

2012-Surgery or botulinum toxin for adductor spasmodic dysphonia: a comparative study

2012-The treatment of laryngeal dystonia (spasmodic dysphonia) with botulinum toxin injections

2012-Tridimensional assessment of adductor spasmodic dysphonia pre- and post-treatment with Botulinum toxin

2012-A Comparison of the VHI, VHI-10, and V-RQOL for Measuring the Effect of Botox Therapy in Adductor Spasmodic Dysphonia 

2011-Interarytenoid Muscle Botox Injection for Treatment of Adductor Spasmodic Dysphonia With Vocal Tremor

2010-Abductor paralysis after botox injection for adductor spasmodic dysphonia

2010-Assessing the effectiveness of botulinum toxin injections for adductor spasmodic dysphonia: clinician and patient perception

2007-The Psychosocial Consequences of BOTOX Injections for Spasmodic Dysphonia: A Qualitative Study of Patients’ Experiences 

2007-Nonpharmacologic effects of botulinum toxin on the life quality of patients with spasmodic dysphonia.

2006-Alterations in CNS Activity Induced by Botulinum Toxin Treatment in Spasmodic Dysphonia

2006-Botulinum Toxin Injection and Airflow Stability in Spasmodic Dysphonia

2003-Botulinum toxin management of adductor spasmodic dysphonia after failed recurrent laryngeal nerve section

2003-Spasmodic dysphonia: clinical features and effects of botulinum toxin therapy in 169 patients—an Australian experience

2002-Unilateral Versus Bilateral Injections of Botulinum Toxin in Patients with Adductor Spasmodic Dysphonia

2002-Acoustic Variations in Reading Produced by Speakers With Spasmodic Dysphonia Pre-Botox Injection and Within Early Stages of Post-Botox Injection

2002-Botox Treatment in Adductor Spasmodic Dysphonia

2001-Long-term Therapy for Spasmodic Dysphonia Acoustic and Aerodynamic Outcomes

Surgery — Selective Laryngeal Adductor Denervation-Reinnervation (SLAD-R)

2012- Selective laryngeal adductor denervation-reinnervation surgery for spasmodic dysphonia

2012-Functional reinnervation of vocal folds after selective laryngeal adductor denervation-reinnervation surgery for spasmodic dysphonia.

2012-Surgery or botulinum toxin for adductor spasmodic dysphonia: a comparative study.

2011-Laryngeal reinnervation for bilateral vocal fold paralysis.

2006-Treatment of adductor spasmodic dysphonia with selective laryngeal adductor denervation and reinnervation surgery.

2006-Long-term follow-up results of selective laryngeal adductor denervation-reinnervation surgery for adductor spasmodic dysphonia.

2005-Voice disorder. Surgical procedures

2004-Laryngeal reinnervation.

2003-Selective denervation: reinnervation for the control of adductor spasmodic dysphonia.

2002-Electrical stimulation of a denervated muscle promotes selective reinnervation by native over foreign motoneurons.

1999-Selective laryngeal adductor denervation-reinnervation: a new surgical treatment for adductorspasmodic dysphonia.

1981-Recurrent laryngeal nerve section in the treatment of spastic dysphonia.

1979-Recurrent layngeal nerve section for spasmodic dysphonia.

1976-Recurrent laryngeal nerve section for spastic dysphonia.


Surgery — Bilateral Vocal Fold Medialization

2019-Bilateral Vocal Fold Medialization: A Treatment for Abductor Spasmodic Dysphonia


Surgery — Thyroarytenoid Myoneurectomy/Myotomy

2018-Bilateral Posterior Cricoarytenoid Myoneurectomy for Abductor Spasmodic Dysphonia

2015-The Comparison of Thyroarytenoid Muscle Myectomy and Type II Thyroplasty for Spasmodic Dysphonia

2012-Endoscopic laser thyroarytenoid myoneurectomy in patients with adductor spasmodic dysphonia: a pilot study on long-term outcome on voice quality

2010-Transoral laser ventricular fold resection and thyroarytenoid myoneurectomy for adductor spasmodic dysphonia: long-term outcome

2010-Selective lateral laser thyroarytenoid myotomy for adductor spasmodic dysphonia

2006-Impact in Vocal Quality in Partial Myectomy and Neurectomy Endoscopic of Thyroarytenoid Muscle in Patients with Adductor Spasmodic Dysphonia


Surgery — Type II Thyroplasty

2017-Long-term Evaluation of Type 2 Thyroplasty with Titanium Bridges for Adductor Spasmodic Dysphonia

2016-Voice tuning with new instruments for type II thyroplasty in the treatment of adductor spasmodic dysphonia

2015-Type II thyroplasty changes cortical activation in patients with spasmodic dysphonia

2014-Long-term voice handicap index after type II thyroplasty using titanium bridges for adductor spasmodic dysphonia

2010-Effects of type II thyroplasty on adductor spasmodic dysphonia

2010-Surgical tips for type II thyroplasty for adductor spasmodic dysphonia: modified technique after reviewing unsatisfactory cases

2009-Long-term results of type II thyroplasty for adductor spasmodic dysphonia

2009-Outcomes of type II thyroplasty for adductor spasmodic dysphonia: analysis of revision and unsatisfactory cases

2003-To study voice quality before and after thyroplasty type 1 in patients with symptomatic unilateral vocal cord paralysis

2002-Analysis of voice and quantitative measurement of glottal gap after thyroplasty type I in the treatment of unilateral vocal paralysis

2001-Thyroplasty for adductor spasmodic dysphonia: further experiences

2000-Effects of thyroplasty type I on vocal fold vibration

1998-Laryngeal recovery following type I thyroplasty


Voice Therapy

2019-Patients’ Perceptions of and Attitudes Toward Voice Therapy: A Pilot Study

2019-Objective Indices of Perceived Vocal Strain

2012-Combined Modality Treatment of Adductor Spasmodic Dysphonia

1995-Combined-modality treatment of adductor spasmodic dysphonia with botulinum toxin and voice therapy


Other Topics Related to Spasmodic Dysphonia

2019-The Influence of Linguistic Demand on Symptom Expression in Adductor Spasmodic Dysphonia

2019-Acoustic and Perceptual Analyses of Adductor Spasmodic Dysphonia in Mandarin-speaking Chinese

2018-Socioeconomic Variables of Patients with Spasmodic Dysphonia: A Preliminary Study

2018-Pharyngeal Dystonia Mimicking Spasmodic Dysphonia

2018-Anxiety and depression in spasmodic dysphonia patients

2017-The Effect of Background Noise on Intelligibility of Dysphonic Speech

2017-Vocal Parameters and Self-Perception in Individuals With Adductor Spasmodic Dysphonia

2017-Adductor focal laryngeal Dystonia: correlation between clinicians’ ratings and subjects’ perception of Dysphonia

2017-Communication‐related affective, behavioral, and cognitive reactions in speakers with spasmodic dysphonia

2016-Behavior Assessment Battery: A Pilot Study of the Affective, Behavioral, and Cognitive Correlates Surrounding Spasmodic Dysphonia

2016-The Americans With Disabilities Act and Voice Disorders: Practical Guidelines for Voice Clinicians

2015-Impaired limb proprioception in adults with spasmodic dysphonia

2014-Workplace Productivity and Voice Disorders: A Cognitive Interviewing Study on Presenteeism in Individuals With Spasmodic Dysphonia

2014-Validation of a Telephone Screening Tool for Spasmodic Dysphonia and Vocal Fold Tremor

2013-Long-term Effect of Sodium Oxybate (Xyrem®) in Spasmodic Dysphonia with Vocal Tremor

2012-Co-Prevalence of Tremor with Spasmodic Dysphonia: A Case-Control Study

2011-Coprevalence of Anxiety and Depression With Spasmodic Dysphonia: A Case-Control Study

2011-A qualitative study of interference with communicative participation across communication disorders in adults.

2011-The Effect of Listener Experience and Anchors on Judgments of Dysphonia

2010-Treatment for spasmodic dysphonia: limitations of current approaches

2009-Developing the Communicative Participation Item Bank: Rasch Analysis Results From a Spasmodic Dysphonia Sample

2009-Risk Factors and Demographics in Patients With Spasmodic Dysphonia

2009-Treatment of spasmodic dysphonia with homeopathic medicine: a clinical case report

2008-Research Priorities in Spasmodic Dysphonia

2005-Chiropractic Care for a Patient with Spasmodic Dysphonia Associated with Cervical Spine Trauma

1997-Female predominance in spasmodic dysphonia

1991-Emotional considerations in spasmodic dysphonia: Psychometric quantification


Vocal Tremor Research

2019-Defining differences in patient characteristics between spasmodic dysphonia and laryngeal tremor.

2019-The Effect of Octanoic Acid on Essential Voice Tremor: A Double-Blind, Placebo-Controlled Study.

2018-A prospective crossover trial of botulinum toxin chemodenervation versus injection augmentation for essential voice tremor.

2016-Laryngoscopy evaluation protocol for the differentiation of essential and dystonic voice tremor.

2016-Vocal Tremor: Novel Therapeutic Target for Deep Brain Stimulation

2016-Dystonia and Tremor: The Clinical Syndromes with Isolated Tremor.

2016-Comparative Effectiveness of Propranolol and Botulinum for the Treatment of Essential Voice Tremor

2016-Voice Tremor in Patients with Essential Tremor: Effects of Deep Brain Stimulation of Caudal Zona Incerta.

2015-Discriminating Simulated Vocal Tremor Source Using Amplitude Modulation Spectra

2015-The effects of physiological adjustments on the perceptual and acoustical characteristics of simulated laryngeal vocal tremor

2015-Isolated vocal tremor as a focal phenotype of essential tremor: a retrospective case review

2013-Defining dystonic tremor.

2012-Co-Prevalence of Tremor with Spasmodic Dysphonia: A Case-Control Study: Co-morbid tremor in Spasmodic Dysphonia

2010-Clinical characteristics of essential voice tremor: a study of 34 cases.

2009-Diagnosis and Management of Essential Tremor and Dystonic Tremor

2006-Development and validation of the vocal tremor scoring system.

2000-Botulinum toxin for essential tremor of the voice with multiple anatomical sites of tremor: a crossover design study of unilateral versus bilateral injection.

1966-Dysphonia due to tremor.


Muscle Tension Dysphonia Research

2019-Positive Effects of Manual Circumlaryngeal Therapy in the Treatment of Muscle Tension Dysphonia (MTD): Long Term Treatment Outcomes

2018-Effects of Voice Therapy on Muscle Tension Dysphonia: A Systematic Literature Review.

2017-Effects of a Voice Therapy Program for Patients with Muscle Tension Dysphonia.

2017-Combined Functional Voice Therapy in Singers With Muscle Tension Dysphonia in Singing.

2017-Validity and Reliability of Surface Electromyography in the Assessment of Primary Muscle Tension Dysphonia.

2017-Vocal Function Exercises for Muscle Tension Dysphonia: Auditory-Perceptual Evaluation and Self-Assessment Rating.

2015-A randomized controlled trial of stretch-and-flow voice therapy for muscle tension dysphonia.

2014-Immediate effects of humming on computed electroglottographic parameters in patients with muscle tension dysphonia.

2014-Automated acoustic analysis of task dependency in adductor spasmodic dysphonia versus muscle tension dysphonia.

2014-The vocal aerodynamic change in female patients with muscular tension dysphonia after voice training.

2014-Perceptions of voice therapy from patients diagnosed with primary muscle tension dysphonia and benign mid-membranous vocal fold lesions.

2013-Collaboration and conquest: MTD as viewed by voice teacher (singing voice specialist) and speech-language pathologist.

2013-The assessment methods of laryngeal muscle activity in muscle tension dysphonia: a review.

2013-An examination of surface EMG for the assessment of muscle tension dysphonia.

2012-Reflections on clinical applications of yoga in voice therapy with MTD.

2012-Position of the hyoid and larynx in people with muscle tension dysphonia.

2012-Effectiveness of the computed analysis of electroglottographic signals in muscle tension dysphonia.

2011-Pathophysiology and treatment of muscle tension dysphonia: a review of the current knowledge.

2010-The treatment of muscle tension dysphonia: a comparison of two treatment techniques by means of an objective multiparameter approach.

2008-The relationship between muscle tension dysphonia type 1 and soft phonation index and the effectiveness of voice therapy

2005-Muscle tension dysphonia in children: Voice characteristics and outcome of voice therapy.


Vocal Fold Paralysis Research

2019-Vocal Fold Paresis: Incidence, and the Relationship between Voice Handicap Index and Laryngeal EMG Findings

2019-Morphometric Differences in the Recurrent Laryngeal Nerve in Patients with Vocal Fold Paralysis.

2019-Transoral silastic medialization for unilateral vocal fold paralysis.

2019-Voice outcome indicators for unilateral vocal fold paralysis surgery: A survey among surgeons.

2019-Stroboscopic assessment of unilateral vocal fold paralysis: a systematic review.

2019-Vocal Fold Paresis.

2019-Cortical networks for speech motor control in unilateral vocal fold paralysis.

2019-Selective reinnervation using phrenic nerve and hypoglossal nerve for bilateral vocal foldparalysis.

2019-The impact of cricothyroid involvement on adductor recovery in unilateral vocal fold paralysis.

2019-Therapy of bilateral vocal fold paralysis: Real world data of an international multi-center registry.

2019-Cortical-Basal Ganglia-Cerebellar Networks in Unilateral Vocal Fold Paralysis: A Pilot Study.

2017-Longitudinal Voice Outcomes After Voice Therapy in Unilateral Vocal Fold Paralysis.