To further complicate card type detection, this mapping changes when card companies allocate new numbers, form partnerships with other card companies, or go out of business. When implemented correctly, automatically detecting card type improves payment form usability.
Masseter muscle. In human anatomy, the masseter is one of the muscles of mastication. In the animal kingdom, it is particularly powerful in herbivores to facilitate chewing of plant matter. The most obvious muscle of mastication is the masseter muscle, since it is the most superficial and one of the strongest. Contents.
the thick rectangular muscle in the cheek that functions to close the jaw. It is one of the four muscles of mastication. The masseter is innervated by the masseteric nerve from the mandibular division of the trigeminal nerve.The major jaw muscle, which participates in protraction, retraction and side to side movement of the jaw. Action. Closes jaw. muscle with origin from the inferior border and medial surface of the zygomatic arch, with insertion into the lateral surface of the ramus of the mandible, with nerve supply from the masseteric nerve, and whose action closes the jaw during chewing.