Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Types of Toxins01:36

Types of Toxins

Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Chronic Pharyngitis01:23

Chronic Pharyngitis

Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Drug Toxicity: Allergic Reactions01:30

Drug Toxicity: Allergic Reactions

Drug-related allergies are immune-mediated responses triggered by the administration of pharmacological agents. These hypersensitivity reactions are classified based on the immune mechanisms involved. The four primary types—Type I, II, III, and IV—are mediated by different immunological pathways and exhibit distinct clinical manifestations.Type I Hypersensitivity/ IgE-Mediated Reactions: Immunoglobulin E (IgE) immediately mediates Type I hypersensitivity reactions. Upon initial exposure to a...
Diphtheria01:28

Diphtheria

Diphtheria is an acute, toxin-mediated infectious disease that primarily affects the upper respiratory tract. It is caused by Corynebacterium diphtheriae, a Gram-positive, pleomorphic rod that lacks spore-forming capability and exhibits a characteristic club-shaped morphology under microscopic examination. While C. diphtheriae can asymptomatically colonize mucosal surfaces, clinical disease manifests only when the bacterial strain is lysogenized by a specific β-corynephage. This phage...
Asthma III: Clinical Manifestations01:13

Asthma III: Clinical Manifestations

Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Droplet applicator module for reproducible and controlled endoscopic laryngeal adductor reflex stimulation.

Biomicrofluidics·2020
Same author

[Guideline: Auditory Processing and Perception Disorders: Diagnostics : S1-Guideline of The German Society of Phoniatrics and Pediatric Audiology].

HNO·2019
Same author

[Guideline: Auditive Processing and Perception Disorders: Definition : Guideline of the German Society of Phoniatrics and Pediatric Audiology].

HNO·2018
Same author

[High-resolution manometry of pharyngeal swallowing dynamics].

HNO·2017
Same author

[Laryngeal and larynx-associated reflexes].

HNO·2016
Same author

[Diagnosis of auditory processing disorders in children].

HNO·2016

Related Experiment Video

Updated: Jun 19, 2026

Quantification of the Potential Impact of Glyphosate-Based Products on Microbiomes
07:42

Quantification of the Potential Impact of Glyphosate-Based Products on Microbiomes

Published on: January 10, 2022

[Dysphonia following glyphosate exposition].

M Ptok1

  • 1Klinik und Poliklinik für Phoniatrie und Pädaudiologie (OE 6510), Medizinische Hochschule Hannover, 30625 Hannover. Ptok.Martin@mh-hannover.de

HNO
|October 28, 2009
PubMed
Summary

A teacher experienced voice loss after correct glyphosate herbicide use. Symptoms suggest temporary nerve damage to the larynx, resolving within six weeks, a case previously unreported.

Area of Science:

  • Toxicology
  • Neurology
  • Otolaryngology

Background:

  • Glyphosate is a widely used nonselective herbicide that inhibits aromatic amino acid synthesis in plants.
  • Human toxicity is documented, primarily following intentional ingestion.
  • Potential neurotoxic effects of glyphosate have been previously discussed in scientific literature.

Observation:

  • A case study details a 26-year-old teacher experiencing severe dysphonia hours after correct glyphosate herbicide application.
  • Laryngostroboscopy indicated reduced vocal fold mobility, suggestive of laryngeal nerve impairment.
  • The patient's symptoms and vocal fold mobility normalized spontaneously over a six-week period.

Findings:

  • The observed dysphonia and vocal fold immobility in this case may represent an intermittent neuropraxia of the laryngeal nerve.

More Related Videos

Neurotoxicity Assessment in Adult Danio rerio using a Battery of Behavioral Tests in a Single Tank
08:36

Neurotoxicity Assessment in Adult Danio rerio using a Battery of Behavioral Tests in a Single Tank

Published on: November 3, 2023

Related Experiment Videos

Last Updated: Jun 19, 2026

Quantification of the Potential Impact of Glyphosate-Based Products on Microbiomes
07:42

Quantification of the Potential Impact of Glyphosate-Based Products on Microbiomes

Published on: January 10, 2022

Neurotoxicity Assessment in Adult Danio rerio using a Battery of Behavioral Tests in a Single Tank
08:36

Neurotoxicity Assessment in Adult Danio rerio using a Battery of Behavioral Tests in a Single Tank

Published on: November 3, 2023

  • This is the first reported instance of such symptoms following correct occupational use of glyphosate.
  • The findings suggest a potential, albeit temporary, neurotoxic effect of glyphosate on the laryngeal nerve.

    • Implications:

    • This case highlights a potential, previously undocumented adverse effect of glyphosate exposure.
    • Further research into the neurotoxic potential of glyphosate, particularly concerning cranial nerves, is warranted.
    • Clinicians should consider glyphosate exposure in the differential diagnosis of unexplained dysphonia, even with correct usage.