system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most impoant muscle which opens mouth is
assistant
The correct answer is  The lateral pterygoid may be regarded as the key muscle of this region because its relations provide a fair idea about the layout of structures in the infratemporal fossa. the relations are as follows: Superficial 1.masseter 2.Ramus of the mandible 3.Tendon of the temporalis 4.The maxillary aery Deep 1.mandibular nerve 2.middle meningeal aery 3.Sphenomandibular ligament 4.Deep head of the medial pterygoid <img src=" /> REF.VOL.3,SIXTH EDITION vol3 pg 118