Both the corrugator and the platysma pull the eyebrow up.The corrugator muscle has fibers that extend to the lateral part of the eyebrow,whereas the procerus has fibers that extend to the medial end of the eyebrow.
A) Both statements are true. B) The first statement is true;the second statement is false. C) The first statement is false;the second statement is true. D) Both statements are false.