Paritial Muscles. Help!

I just watched a video on youtube of an exercise named the end range paritial it was explained as working the paritial muscles in there end range. It resembles 1 arm rear lat raise on the ground. does anyone know what the paritial muscles are? or what this video is referring to? I am confused i can not find any information on paritial muscles anywhere

thanks in advance

here is a copy of the video

there is no “paritial muscle”.

it’s “parietal muscleS”
ie the “core”.

no it is the paritial muscle… this is not the first time i have seen this exercise… i believe it is a poliquin movement… (i could be wrong)

thanks BBB… i have taken anatomy and do not remember anything about a paritial muscle… nor can i find any information about it in my textbooks… or google