GC: n

S: NIH – https://www.ninds.nih.gov/Disorders/Patient-Caregiver-Education/Fact-Sheets/Myoclonus-Fact-Sheet (last access: 20 November 2020); HLN – https://www.healthline.com/health/myoclonus  (last access: 20 November 2020).

N: 1. From word-forming element myo- (before vowels my-, meaning “muscle,” from combining form of Greek mys “muscle,” literally “mouse”) and word clonus (“violent muscular spasms, rapidly alternating contraction and relaxation of a muscle,” 1817, from Modern Latin, from Greek klonos “turmoil, any violent motion; confusion, tumult, press of battle,” a word of uncertain origin; related: clonicity).
– G25.3: code used in the International Statistical Classification of Diseases and Related Health Problems.
2. In nervous system disease: Myoclonus.
Brief, involuntary jerks of the trunk and of the limbs may occur in spinal myoclonus. Many diffuse, metabolic, or local structural causes of myoclonus are possible, and the disease commonly originates in the brainstem or in the cerebral hemispheres.
3. It may be part of a disease process (e.g., epileptic or post-anoxic myoclonus) or be a normal physiological response (e.g., nocturnal myoclonus).
4. Most causes of myoclonus are symptomatic and include posthypoxia, toxic-metabolic disorders, reactions to drugs, storage disease, and neurodegenerative disorders.

S: 1. OED – https://www.etymonline.com/search?q=myo; https://www.etymonline.com/search?q=clonus (last access: 20 November 2020); TERMIUM PLUS – https://www.btb.termiumplus.gc.ca/tpv2alpha/alpha-eng.html?lang=eng&i=1&srchtxt=myoclonus&codom2nd_wet=1#resultrecs (last access: 20 November 2020). 2. EncBrit – https://global.britannica.com/science/myoclonus (last access: 20 November 2020). 3. TERMIUM PLUS – https://www.btb.termiumplus.gc.ca/tpv2alpha/alpha-eng.html?lang=eng&i=1&srchtxt=myoclonus&codom2nd_wet=1#resultrecs (last access: 20 November 2020). 4. ScDir – https://www.sciencedirect.com/science/article/abs/pii/S1474442204008804 (last access: 20 November 2020).

SYN:
S:

CR: lesion