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Related Concept Videos

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...
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
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,...
Muscles for Facial Expressions01:14

Muscles for Facial Expressions

The craniofacial muscles are a collection of approximately 20 thin skeletal muscles situated beneath the skin of the face and scalp. These muscles, primarily responsible for the vast array of human facial expressions, originate from the bones or fibrous structures of the skull and extend outwards to connect with the skin. While most skeletal muscles in the body are enveloped in thick fascia, facial muscles generally have a more delicate fascial covering, with the buccinator muscle being a...
Chemical Synapses01:26

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Chemical Synapses01:26

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Related Experiment Video

Updated: May 7, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
19:53

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer

Published on: March 1, 2015

Peripheral facial weakness (Bell's palsy).

Vanja Basić-Kes1, Vesna Dermanović Dobrota, Marijan Cesarik

  • 1University Department of Neurology, Sestre milosrdnice University Hospital Center, Zagreb, Croatia. vanjakes@net.hr

Acta Clinica Croatica
|September 24, 2013
PubMed
Summary

Peripheral facial weakness, often Bell's palsy, causes one-sided facial muscle weakness. While Bell's palsy typically resolves, secondary causes require treating the underlying condition.

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

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Last Updated: May 7, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
19:53

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer

Published on: March 1, 2015

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

Area of Science:

  • Neurology
  • Otolaryngology

Background:

  • Peripheral facial weakness involves damage to the facial nerve, leading to unilateral facial muscle weakness.
  • It is categorized as primary (idiopathic, e.g., Bell's palsy) or secondary (due to identifiable causes).
  • Secondary causes are more common, including viral infections, trauma, surgery, diabetes, tumors, and neurological disorders.

Purpose of the Study:

  • To review the causes, diagnosis, and treatment of peripheral facial weakness.
  • To differentiate management strategies for idiopathic (Bell's palsy) versus secondary facial weakness.

Main Methods:

  • Diagnostic approaches include clinical examination, blood tests, cerebrospinal fluid analysis, nerve conduction studies, and neuroimaging (MRI, X-ray).
  • Treatment for secondary cases targets the underlying etiology.
  • Treatment for Bell's palsy remains controversial, with limited evidence for steroids or antivirals.

Main Results:

  • Bell's palsy generally has a good prognosis, with approximately 80% of patients achieving full recovery.
  • A significant minority experience permanent nerve damage (15%) or severe consequences (5%).

Conclusions:

  • Effective management of peripheral facial weakness depends on accurate diagnosis of its cause.
  • Further research is needed to establish definitive treatments for Bell's palsy.