Ma'anar ƙamus na Amyotrophic Lateral Sclerosis (ALS) cuta ce mai ci gaba ta neurodegenerative wacce ke shafar ƙwayoyin jijiya da ke da alhakin sarrafa tsokoki na son rai. Ana siffanta shi da raunin tsoka da atrophy, spasticity, da wahalar magana, haɗiye, da numfashi. ALS kuma ana kiranta da cutar Lou Gehrig, bayan sanannen ɗan wasan ƙwallon baseball wanda aka gano yana da yanayin a 1939. A halin yanzu babu magani ga ALS, kuma jiyya na nufin sarrafa alamun bayyanar cututtuka da rage ci gaban cuta.