Peripheral Facial Paralysis
Peripheral Facial Paralysis - Related Videos
19:53
Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
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Cited by 17 •
2015
The use of the masseteric nerve as donor nerve represents a single-stage alternative to the criterion standard two-stage procedure of cross-facial nerve grafting and free muscle transfer in facial paralysis. We provide a detailed description to safely perform this technique with a gracilis muscle transfer and discuss indications and limitations.
10:11
Facial Nerve Axotomy in Mice: A Model to Study Motoneuron Response to Injury
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Cited by 27 •
2015
We present a surgical protocol detailing how to perform a cut or crush axotomy on the facial nerve in the mouse. The facial nerve axotomy can be employed to study the physiological response to nerve injury and test therapeutic techniques.
03:03
Fluorescent Reporter-Based Paralysis Assay: A Technique to Assess Age-Associated Progressive Formation of Polyglutamine Fluorescent Reporter and Associated Paralysis in Caenorhabditis elegans
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2025
This video demonstrates an in vivo imaging-based assay to determine proteostasis decline due to aging. The assay uses Caenorhabditis elegans expressing polyglutamine YFP-fusion protein in body wall muscles to measure the age-associated aggregation of polyglutamine and induction of proteotoxicity, leading to paralysis.
03:37
Performing Crush Axotomy on the Facial Nerve in a Mouse Model
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2025
Source: Olmstead, D. N., et al., Facial Nerve Axotomy in Mice: A Model to Study Motoneuron Response to Injury. J. Vis. Exp. (2015).This video demonstrates the facial nerve crush procedure in a mouse, where blunt dissection through key landmarks exposes the facial nerve trunk at the stylomastoid foramen. Forceps are then used to compress the nerve trunk, inducing axonal damage and disrupting neuronal signal transmission.
08:36
Separation of Mouse Embryonic Facial Ectoderm and Mesenchyme
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Cited by 23 •
2013
A protocol for separation of embryo facial ectoderm and mesenchyme is described. We use Dispase II to treat whole embryos first, dissect whole facial prominences out, and then separate the facial ectoderm and mesenchyme.
FAQs
Because the lesion is lower motor neuron, the interruption occurs after the facial nerve nucleus and along the nerve’s route to the muscles of facial expression. Signals therefore fail to reach multiple facial regions on the affected side, rather than producing an isolated deficit in one muscle. This pathway-based pattern makes the condition useful for analyzing motor control.
Clinical localization depends on which facial regions lose movement. In peripheral facial paralysis, weakness may involve the forehead, eyelid, cheek, and mouth on the same side because the peripheral nerve pathway is affected. Recognizing this broad, ipsilateral distribution helps investigators and clinicians distinguish a peripheral process from a central lesion during neurological assessment.
Cranial nerve VII carries signals from its nucleus through the peripheral nerve to muscles responsible for facial expression. Dysfunction anywhere along this route can interrupt communication between the nervous system and those muscles. Studying the resulting weakness connects a specific neural pathway with visible motor behavior, providing a biological model for examining how nerve damage affects movement.
These conditions represent different possible causes of dysfunction along the facial nerve pathway. Inflammation or infection may interfere with nerve performance, while trauma or compression can disrupt signal transmission through physical injury or pressure. Comparing these causes helps research examine why the same pattern of facial weakness can arise from different pathological processes.
A neurological examination evaluates movement across the affected side of the face, including the forehead, eyelid, cheek, and mouth. Mapping which regions are weak helps relate the observed motor pattern to the facial nerve pathway and supports localization as peripheral rather than central. Repeated examinations can also contribute to evaluating changes during recovery.
Imaging is used with neurological examination to investigate the facial nerve problem and its possible cause. Findings from the clinical assessment and imaging can guide targeted treatment directed at the identified condition, although the specific approach depends on whether inflammation, infection, trauma, or compression is suspected. This combination links diagnosis with individualized management.
The condition provides a visible model for studying motor control, peripheral nerve pathways, and neurological disease. Researchers can relate facial movement patterns to dysfunction of cranial nerve VII, compare peripheral and central lesions, and monitor recovery through examination and imaging. These observations support investigation of disease mechanisms as well as evaluation of treatment response over time.