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Related Concept Videos

Cranial Nerves: Overview and Anatomy01:19

Cranial Nerves: Overview and Anatomy

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The cranial nerves are an important part of the complex network of nerves in the human body. These nerves emerge directly from the brain and are responsible for transmitting essential information between the brain and various parts of the head and neck. There are 12 pairs of cranial nerves, systematically numbered using Roman numerals from I to XII, beginning from the anterior and moving to the posterior of the brain. Each cranial nerve is uniquely identified by names that reflect its function...
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Visual Agnosia01:12

Visual Agnosia

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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Suctioning the Nasopharyngeal Airway01:29

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Nasopharyngeal suctioning is a procedure to remove secretions from the upper part of the respiratory tract that the patient cannot clear independently. It helps maintain airway patency and prevents complications such as aspiration pneumonia.
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Anatomy of the Ear01:16

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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
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Cranial Nerves: Types Part I01:14

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
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Cranial Nerves: Types Part II01:22

Cranial Nerves: Types Part II

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves. While the first six innervate the head and neck, the latter six nerves innervate the head and neck, as well as organs and tissues in the thoracic and abdominal cavities. They facilitate communication, expression, and autonomic control within the human body.
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Related Experiment Video

Updated: Dec 1, 2025

Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
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Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing

Published on: December 1, 2023

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Visual Neurolaryngology.

James Phillip Thomas1

  • 1Voicedoctor.net, Portland, Oregon, USA, thomas@voicedoctor.net.

Advances in Oto-Rhino-Laryngology
|November 9, 2020
PubMed
Summary

Visual diagnosis of laryngeal neurologic impairments offers accurate upper airway assessment. This method can guide treatment, potentially avoiding electromyography (EMG) studies.

Area of Science:

  • Neurology
  • Otolaryngology
  • Diagnostic Imaging

Background:

  • Visual diagnosis is a key method for assessing neurologic impairments of the larynx.
  • Accurate visual assessment can guide treatment decisions for upper airway disorders.

Purpose of the Study:

  • To highlight the principles and diagnostic findings of visual examination in neurolaryngology.
  • To establish visual diagnosis as a precise method for evaluating laryngeal neurologic status.

Main Methods:

  • Endoscopic examination of the larynx to visualize muscle function.
  • Assessment of muscle action, timing, and degree of motion during laryngeal tasks.
  • Identification of compensatory mechanisms used by patients.

Main Results:

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  • Specific visual findings include paralysis, paresis, synkinesis, fixation, tremor, spasm, and reinnervation.
  • Inappropriate timing or degree of muscle contraction indicates reinnervation.
  • Removing patient compensation during examination reveals underlying pathology.

Conclusions:

  • Visual diagnosis of laryngeal neurologic impairments is highly accurate.
  • Precise visual assessments can potentially eliminate the need for electromyography (EMG) studies.
  • Understanding neurolaryngology principles aids in identifying subtle signs of laryngeal dysfunction.