The document summarizes the key anatomical structures and contents of the temporal and infratemporal regions. The temporal fossa is bounded by bones and contains the temporalis muscle and arteries. The infratemporal fossa below contains muscles like the lateral and medial pterygoids and nerves like the mandibular nerve. The maxillary artery branches throughout these regions, including the pterygopalatine fossa which communicates between structures. The temporalis, masseter, and pterygoid muscles are involved in mastication.