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Related Concept Videos

Larynx01:21

Larynx

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The human larynx, often referred to as the voice box, is an intricate organ located in the neck. It serves as a pathway for air to enter the lungs during respiration and is an essential component of voice production.
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The larynx consists of various components, including cartilage, muscles, and vocal cords. Its structure includes three large unpaired cartilages—the thyroid, cricoid, and epiglottis—and three smaller paired cartilages—the arytenoids,...
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Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
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Physical Assessment of the Respiratory Tract II: Palpation01:24

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Physical assessment of the respiratory tract is critical in identifying potential health issues. One key component of this assessment is palpation, a technique healthcare providers use to assess the body for abnormalities. This content explores the method of palpation in evaluating the respiratory tract, focusing on thoracic palpation and tactile fremitus.
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Physical Assessment of the Respiratory Tract III: Percussion01:29

Physical Assessment of the Respiratory Tract III: Percussion

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The respiratory system, fundamental to life, consists of complex structures responsible for gas exchange. The percussion assessment is critical to understanding this system's health and functionality. This non-invasive assessment technique allows healthcare providers to evaluate the density or aeration of the lungs, thereby identifying potential abnormalities.
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Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

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Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
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Physical Assessment of the Respiratory Tract IV: Auscultation01:28

Physical Assessment of the Respiratory Tract IV: Auscultation

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Auscultation is a crucial component of the physical assessment of the respiratory tract. It offers valuable insights into airflow through the bronchial tree and potential lung obstructions. This process involves careful listening to breath, voice, and adventitious sounds, which can reveal a wealth of information about a patient's respiratory health.
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Related Experiment Video

Updated: Feb 22, 2026

MRI-guided Focused Ultrasound Thalamotomy for Patients with Medically-refractory Essential Tremor
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Vocal tremor: where are we at?

Amanda L Richards1

  • 1Pinnacle Voice and Swallow Centre, Epworth Richmond, The Royal Melbourne Hospital, Parkville, Victoria, Australia.

Current Opinion in Otolaryngology & Head and Neck Surgery
|September 23, 2017
PubMed
Summary

Vocal tremor, often overlooked in movement disorders, significantly impacts quality of life. Understanding tremor phenomenology aids diagnosis and treatment, with central pathways now better understood.

Area of Science:

  • Neurology
  • Movement Disorders
  • Speech Pathology

Background:

  • Vocal tremor is a common yet frequently underestimated symptom in various movement disorders.
  • It significantly diminishes patients' quality of life.
  • Accurate diagnosis relies on meticulous observation of tremor characteristics.

Purpose of the Study:

  • To review the current understanding of vocal tremor in movement disorders.
  • To highlight the importance of phenomenological assessment for diagnosis and treatment.
  • To discuss recent advancements in understanding the underlying neurobiology.

Main Methods:

  • Literature review of studies on vocal tremor in movement disorders.
  • Analysis of diagnostic criteria and phenomenological features.

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Last Updated: Feb 22, 2026

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  • Synthesis of recent findings on central pathway involvement.

    • Main Results:

    • The central nervous system pathways implicated in vocal tremor associated with different diseases have been further clarified.
    • Phenomenological observation remains crucial for differentiating tremor types and guiding therapeutic strategies.
    • Emerging research sheds light on the neurobiological underpinnings of vocal tremor.

    Conclusions:

    • Patients with vocal tremor often require a multimodal treatment approach.
    • Integrated care involving medical, interventional, and speech therapies within a multidisciplinary setting is recommended.
    • Further research into central pathways may lead to more targeted therapies.