Final answer:
The incorrect statement about mastication muscles is the claim that there are both superficial and deep temporalis muscles; there is only a single temporalis muscle. Additionally, while the temporalis assists in chewing, it elevates rather than retracts the mandible. option a.
Step-by-step explanation:
If we wanted to explain the mastication muscles to someone unfamiliar with them, we would say that there are both superficial and deep muscles involved in chewing. However, one statement that would not be correct is A. There are both superficial and deep temporalis muscles. Instead, the correct information would be that there is a single temporalis muscle, which you can indeed feel move when you touch your temple while chewing, as stated in B. You can feel the temporalis move by touching your temple. Additionally, C. The masseter elevated the mandible to close the mouth is correct as the masseter is the main muscle that performs this action. The incorrect statement in the options provided would be D. The masseter is assisted by the temporalis, which retracts the mandible, since the temporalis muscle actually assists in elevating the mandible, not retracting it. The medial pterygoid and lateral pterygoid muscles assist with other movements necessary for chewing.