Which of the following muscles is involved in producing horizontal wrinkles in the forehead?
A) the temporalis
B) the frontal belly of the epicranius
C) the medial pterygoid
D) the zygomaticus major

Question

Quizplus · Accepted Answer

The frontal belly of the epicranius, which is part of the larger muscle known as the occipitofrontalis, is responsible for raising the eyebrows and creating horizontal wrinkles in the forehead when contracted. The other listed muscles are not involved in this particular facial expression.

Which of the Following Muscles Is Involved in Producing Horizontal