Fasciculation

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
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Fasciculation
Synonyms	N/A
Pronounce	N/A
Specialty	N/A
Symptoms	Muscle twitch
Complications	N/A
Onset	N/A
Duration	N/A
Types	N/A
Causes	Motor neuron disease, Peripheral nerve hyperexcitability, Electrolyte imbalance, Stress
Risks	N/A
Diagnosis	Clinical diagnosis, Electromyography
Differential diagnosis	Myokymia, Myoclonus, Tremor
Prevention	N/A
Treatment	Reassurance, Magnesium supplementation, Beta blockers
Medication	N/A
Prognosis	N/A
Frequency	Common
Deaths	N/A

Fasciculation is a brief, spontaneous contraction affecting a small number of muscle fibers, often causing a flicker of movement under the skin. These involuntary muscle twitches are typically benign but can be associated with various neurological conditions.

Causes

Fasciculations can be caused by a variety of factors, including:

• Benign fasciculation syndrome
• Amyotrophic lateral sclerosis (ALS)
• Spinal muscular atrophy
• Peripheral neuropathy
• Myopathy
• Electrolyte imbalance
• Stress and anxiety
• Caffeine and other stimulants

Symptoms

The primary symptom of fasciculation is the visible twitching of muscles, which can occur in any voluntary muscle group. Common areas include the eyelid, calf, and thumb. These twitches are usually painless but can be annoying or concerning to the individual experiencing them.

Diagnosis

Diagnosis of fasciculations typically involves a thorough medical history and physical examination. Additional tests may include:

• Electromyography (EMG)
• Nerve conduction study
• Blood tests to check for electrolyte imbalances or other underlying conditions
• Magnetic resonance imaging (MRI) to rule out structural abnormalities

Treatment

Treatment for fasciculations depends on the underlying cause. In cases where fasciculations are benign, no treatment may be necessary. For other causes, treatment options may include:

• Addressing electrolyte imbalances
• Managing stress and anxiety
• Reducing caffeine and stimulant intake
• Medications for underlying neurological conditions

Prognosis

The prognosis for individuals with fasciculations varies depending on the underlying cause. Benign fasciculations generally have a good prognosis and do not lead to serious health issues. However, fasciculations associated with neurological diseases may indicate a more serious condition that requires ongoing management.

See also

• Muscle twitch
• Myoclonus
• Neuromuscular disease
• Motor neuron disease