Muscle twitching is caused by involuntary nerve discharges
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Medical reference literature establishes that involuntary muscle contractions and spasms can be caused by disorders affecting the nerves that innervate them or lower motor neuron lesions.
Fasciculation
A fasciculation, or "muscle twitch", is a small, local, involuntary muscle contraction and relaxation. At times it may be visible under the skin. Deeper areas can be detected by EMG testing. A fasciculation can happen in any skeletal muscle in the body. Fasciculations can occur in normal healthy people.[1] One uncommon reason for them is due to a lower motor neuron lesion that may be caused by any of several diseases. One example would be Amyotrophic Lateral Sclerosis.
References
- ↑ Sabyasachi Sircar, Principles of Medical Physiology (Stuttgart; New York: Thieme, 2008), p. 116
Other websites
- What is a Fasciculation? About.com Archived 2014-04-12 at the Wayback Machine
Tetany or tetanic seizure is a medical sign consisting of the involuntary contraction of muscles, which may be caused by disorders that increase the
Tetany or tetanic seizure is a medical sign consisting of the involuntary contraction of muscles, which may be caused by disorders that increase the action potential frequency of muscle cells or of the nerves that innervate them.
Muscle cramps caused by the disease tetanus are not classified as tetany; rather, they are due to a lack of inhibition to the neurons that supply muscles. Tetanic contrac
Tetany or tetanic seizure is a medical sign consisting of the involuntary contraction of muscles, which may be caused by disorders that increase the action potential frequency of muscle cells or of the nerves that innervate them.
Muscle cramps caused by the disease tetanus are not classified as tetany; rather, they are due to a lack of inhibition to the neurons that supply muscles. Tetanic contractions (physiologic tetanus) have a broad range of muscle contraction types, of which tetany is only one.
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