Myopathy
Myopathy is a general term referring to any disease that affects the muscles that control voluntary movement in the body. Patients experience muscle weakness due to a dysfunction of the muscle fibers.
statin-induced myopathy: can vary from mild (with symptoms of muscle aches, symptoms usu- ally abate rapidly after discontinuation of the statin, although occasionally up to 2 months may be required) to severe (with rhabdomyolysis which can → nephropathy)
critical illness myopathy: Muscles not excitable with direct stimulation. EMG: low or normal CMAP with a normal SNAP. Muscle biopsy: abnormalities may range from Type II fiber atrophy to necrosis (severe necrosis may not recover)
Rodriguez B, Nansoz S, Cameron DR, Z'Graggen WJ. Is myopathy part of long-Covid? Clin Neurophysiol. 2021 Mar 26:S1388-2457(21)00476-4. doi: 10.1016/j.clinph.2021.03.008. Epub ahead of print. PMID: 33867257.