'amyotrophia' originates from Greek, specifically the word 'amyotrophia,' where 'a-' meant 'without,' 'myo-' referred to 'muscle,' and 'trophia' meant 'nourishment.'

'amyotrophia' changed from the Greek word 'amyotrophia' and has been adopted into modern English with the same spelling and meaning.

Initially, it meant 'lack of muscle nourishment,' and this meaning has largely remained the same in modern usage.