The chewing muscles that protract the mandible and produce side-to-side grinding movements are the a. buccinators, b. masseters, c. temporalis, d. pterygoids.

Video transcript

Hi, everyone. Let's take a look at this practice problem together, which is a powerful superficial quadrangular muscle responsible for elevating the mandible during chewing. The answer options are a brachialis B buccinator C maser and D Tago. So what is the mandible? It's the lower jaw bone. So which of these answer options can we eliminate solely based on it not being located near the mandible? So that's option A the bray allis recall that the bray Alice is a muscle of the upper arm. It flexes the forearm at the elbow joint. So option A is incorrect. Option D the tero and there's actually the medial, paranoid and the lateral paranoid. Now, they are located near the temporomandibular joint and they do assist in chewing. However, chewing is not their primary movement or elevating. The mandible is not their primary movement. So, option D is incorrect. Now, the bucca, this is a facial muscle. It is found under the cheeks and it's responsible for keeping the cheeks against the teeth. This is not a muscle that assists in chewing. So option B is incorrect. So it's the mater that is the very strong and thick muscle that elevates the mandible. So the correct answer is option C maor. All right, everyone. I hope you found this helpful and I'll see you soon for the next practice problem.