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fasciculation
This term is primarily used in clinical neurology and anatomy, carrying a highly technical register. In a medical context, it describes the visible twitching of a muscle, which is often benign but can be a diagnostic sign of lower motor neuron disease. It is distinct from a cramp or a seizure, as it involves only a small group of muscle fibers rather than the entire muscle belly.
In anatomical descriptions, the term refers to the structural organization of nerves or muscles into bundles. This usage is descriptive and structural rather than symptomatic, focusing on the morphology of the tissue rather than a physiological event.
Meanings
A brief, spontaneous, involuntary contraction of a small number of muscle fibers, typically appearing as a visible twitching under the skin.
Examples
My eyelid has been experiencing constant fasciculation since I started drinking too much coffee.
Is this fasciculation in my thumb normal or should I see a doctor?
The neurologist noted the presence of fasciculation in the patient's upper arm.
Stress and fatigue often trigger benign fasciculation in the facial muscles.
I can see a slight fasciculation under the skin of his thigh.
The textbook describes the fasciculation of axons into larger nerve trunks.
Microscopic analysis revealed an unusual pattern of fasciculation within the muscle tissue.
Early anatomical drawings often struggled to accurately depict the fasciculation of human nerves.
Early anatomical drawings often struggled to accurately depict the fasciculation of human nerves.