attached to medial surface of masseter muscle zygomaticomandibularis muscle Zygomaticomandibularis anterior Deep masseter anterior Masseter medialis pars zygomaticomandibularis anterior Masseter pars profundus The zygomaticomandibularis is a separable part of the masseter muscle that attaches to the medial surface of the zygomatic arch Deep masseter doi:10.1093/icb/icr067 Ready for review. Zygomaticomandibularis superioris Masseter profundus Deepest portion of masseter Masseter pars profunda Masseter medialis pars anterior zygomatic arch