Vascular (i.e.Cardiovascular)
-Stroke
Infectious
Viral infections
Lyme myositis
Trichinosis
Toxoplasmosis
Neoplastic and deconditioning
Cachexia
Drug-induced or Drug Withdrawal
Methamphetamines, Cocaine, heroin
Alcohol, corticosteroids
Colchicine, antimalarial drugs
Statins
Inflammatory
xxx
Congenital and genetic
Muscular dystrophies etc.
Autoimmune disorders
Myasthenia gravis
Trauma
xxx.
Endocrine, electrolyte and other metabolic abnormalities.
Hypothyroidism
Cushing’s syndrome
>See deficiencies for electrolyte abnormalities.
Deficiencies and excesses
Hypokalemia
Hyponatremia
Hypophosphatemia
Hypocalcemia
Musculoskeletal and rheumatologic
Disuse atrophy
Rhabdomyolysis
Polymyositis
Dermatomyositis
Inclusion body myositis
Amyotrophic lateral sclerosis
Environmental Exposure
E.g. passed out and spent-time in one place under the hot summer sun leading to other complications.
Neuropsychiatric
Compression neuropathy (e.g., Saturday night palsy)
Multiple sclerosis
Muscular dystrophy
Peripheral neuropathy
Further reading
Am Fam Physician. 2005 Apr 1;71(7):1327-1336. http://www.aafp.org/afp/2005/0401/p1327.html