Preservation of certain voluntary muscles in motoneurone disease.
D000690:Amyotrophic Lateral Sclerosis / Q000473:pathology; D001003:Anal Canal / Q000294:innervation; D006801:Humans; D009046:Motor Neurons / Q000473:pathology*; D009410:Nerve Degeneration; D009468:Neuromuscular Diseases / Q000473:pathology*; D012007:Rectum / Q000294:innervation