I think it wasn't because of the movement, but because a particular small muscle looked like a mouse when excised. Oh, no, you seem to be right - it's about th

I think it wasn't because of the movement, but because a particular small muscle looked like a mouse when excised. Oh, no, you seem to be right - it's about the movement. https://www.etymonline.com/word/muscle#etymonline_v_19290 https://www.etymonline.com/word/muscle#etymonline_v_19290