To produce horizontal wrinkles in the forehead, which of the following muscles is involved?
A) the medial pterygoid
B) the zygomaticus major
C) the frontal belly of the epicranius
D) the temporalis
Answer: C
To produce horizontal wrinkles in the forehead, which of the following muscles is involved?
A) the medial pterygoid
B) the zygomaticus major
C) the frontal belly of the epicranius
D) the temporalis