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Related Concept Videos

Vascular Spasm01:16

Vascular Spasm

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The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
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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...
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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 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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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
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Related Experiment Video

Updated: Apr 8, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
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Hemifacial spasm: The past, present and future.

Neera Chaudhry1, Abhilekh Srivastava1, Laxmikant Joshi1

  • 1Department of Neurology, GB Pant Institute of Postgraduate Medical Education and Research, India.

Journal of the Neurological Sciences
|June 27, 2015
PubMed
Summary

Hemifacial spasm causes involuntary facial twitches, impacting quality of life. Botulinum toxin injections and surgical decompression are effective treatments for this condition.

Keywords:
Botulinum toxin therapyDifferential diagnosisHemifacial spasmMovement disorderPathogenesisReviewSurgical treatment

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Area of Science:

  • Neurology
  • Ophthalmology

Background:

  • Hemifacial spasm involves unilateral facial muscle contractions.
  • It can significantly impair vision and quality of life due to social distress.

Purpose of the Study:

  • To review current therapeutic options for hemifacial spasm.
  • To highlight the efficacy of botulinum toxin and surgical decompression.

Main Methods:

  • Literature review of hemifacial spasm treatments.
  • Analysis of noninvasive and surgical therapeutic approaches.

Main Results:

  • Botulinum toxin therapy is a well-established noninvasive treatment.
  • Surgical decompression of aberrant blood vessels is an emerging therapeutic option.

Conclusions:

  • Both botulinum toxin and surgical decompression offer viable treatment pathways.
  • Addressing hemifacial spasm can improve patient's functional vision and social well-being.