Structure and Innervation - Masseter (composed of superficial and deep head) - Temporalis (sphenomandibularis considered part of temporalis by some sources) - Medial pterygoid - Lateral pterygoid - Mandible connected to temporal bone via temporomandibular joint - Muscles of mastication innervated by trigeminal nerve (CN V) - Specifically innervated by mandibular branch (CN V) - Trigeminal nerve is both sensory and motor

Development - Muscles of mastication and facial expression have different embryological origins - Muscles of mastication originate from first pharyngeal arch

Function - Mandible is the only bone that moves during mastication and talking - Four primary muscles of mastication participate in mastication - Other muscles like tongue and cheeks also assist in the process

External Links - Wikimedia Commons has media related to Muscles of mastication - Masticatory Muscles at the U.S. National Library of Medicine Medical Subject Headings (MeSH) - Link to a lecture on infratemporal fossa anatomy - Articles with imported Creative Commons Attribution 4.0 text - Articles with TA98 identifiers