pattern of muscle involvement

i'm translating an academic paper regarding "progressive muscular dystrophy" and there is a sentence that beggings in this way

The pattern of muscle involment is very regular...

Is it correct to say in Spanish "el patrón de los músculos implicados se mantiene con regularidad/ es bastante regular". My main concern is regarding the term patrón de los músculos implicados.

thanx in advance.

El patrón de intrincación muscular está dentro de la normalidad.:)