Focal myopathic changes produced by electromyographic and hypodermic needles. "Needle myopathy".
D000690:Amyotrophic Lateral Sclerosis / Q000473:pathology*; D000818:Animals; D001706:Biopsy; D004576:Electromyography; D006168:Guinea Pigs; D006801:Humans; D007273:Injections, Intramuscular; D009132:Muscles / Q000473:pathology*