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Related Concept Videos

Cranial Nerves: Overview and Anatomy01:19

Cranial Nerves: Overview and Anatomy

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...
Cranial Nerves: Types Part I01:14

Cranial Nerves: Types Part I

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.
Olfactory Nerve (Cranial Nerve I)
The olfactory nerve, or cranial nerve I, is unique as it is purely sensory and dedicated to the sense of smell. This nerve originates in the olfactory epithelium of the...
Cranial Nerves: Types Part II01:22

Cranial Nerves: Types Part II

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.
Facial Nerve (Cranial Nerve VII)
Cranial nerve VII, or the facial nerve,...
Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
Assessment of Airway, Skin Color, and Use of Accessory Muscles01:30

Assessment of Airway, Skin Color, and Use of Accessory Muscles

A thorough assessment of respiratory health is paramount in clinical settings to identify and manage respiratory distress and ensure adequate oxygenation. This article elaborates on the critical aspects of respiratory evaluation, including airway assessment, skin color examination, and the observation of accessory muscle use, which are integral to effectively diagnosing and managing patients with respiratory conditions.
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Graded Potential01:19

Graded Potential

Graded potentials are localized fluctuations in the cell membrane's electrical charge, commonly found in the dendrites of neurons. The magnitude of these potential changes depends on the strength of the initiating stimulus. In a membrane at its resting potential, a graded potential signifies a voltage shift either above -70 mV or below -70 mV.
Graded potentials fall into two categories: depolarizing and hyperpolarizing. Depolarizing graded potentials typically occur when sodium (Na+) or calcium...

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Updated: Jun 12, 2026

Facial Nerve Surgery in the Rat Model to Study Axonal Inhibition and Regeneration
05:04

Facial Nerve Surgery in the Rat Model to Study Axonal Inhibition and Regeneration

Published on: May 5, 2020

Approaches to grading facial nerve function.

Michael J Brenner1, J Gail Neely

  • 1Department of Otolaryngology-Head and Neck Surgery, Washington University School of Medicine, St. Louis, MO.

Seminars in Plastic Surgery
|June 25, 2010
PubMed
Summary
This summary is machine-generated.

Accurate facial nerve grading is crucial for assessing disability and treatment response. This review highlights the evolution of facial nerve grading systems, emphasizing computer-based methods for objective analysis.

Keywords:
Facial nerve paralysisfacial expressionfacial nervefacial nerve palsy

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Area of Science:

  • Neurology
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Facial nerve paralysis assessment requires objective grading for clinical and research purposes.
  • Current methods face challenges due to anatomical complexity and subjective nature of facial expression analysis.
  • Need for precise, reliable, and quantitative grading systems is evident.

Purpose of the Study:

  • To review clinical considerations in facial function grading.
  • To trace the historical development of facial nerve grading approaches.
  • To emphasize advancements in computer-based facial nerve grading techniques.

Main Methods:

  • Literature review of clinical considerations in facial nerve grading.
  • Historical analysis of the evolution of grading systems.
  • Focus on advancements in computer-based quantitative analysis.

Main Results:

  • Systematic evaluation aids in objective disability assessment and therapy response.
  • Developing an ideal grading system is challenging due to anatomical variations and subjective assessments.
  • Computer-based methods offer potential for objective and quantitative facial nerve grading.

Conclusions:

  • Objective grading of facial nerve paralysis is essential for consistent clinical communication and research.
  • The evolution of grading systems reflects a move towards greater objectivity and quantification.
  • Computer-based approaches represent a significant advancement in accurately assessing facial nerve function.