Lecture Notes - Infratemporal Fossa & Oral Cavity

The streaming video of the 2004-5 lab overview is unfortunately not available.
The computer presentation used by Dr. Castelli in lecture is available on the web (password protected). You can also download the PowerPoint presentation to print or review.

  1. Muscles of mastication
    1. Masseter
    2. Temporalis
    3. Lateral pterygoid
    4. Medial pterygoid
  2. Temporomandibular joint (TMJ)
    • Synovial, combined hinge and gliding joint, articular surfaces, articular disk
  3. Infratemporal fossa
    • Boundaries
    • Content
      1. Lateral pterygoid muscle
      2. Maxillary artery
        • Course in infratemporal fossa (superficial or deep to lateral pterygoid muscle)
        • Main branches: middle meningeal, inferior alveolar, masseteric, deep temporal (ant. &post.), buccal and muscular branches to pterygoid muscles
        • The maxillary artery leaves the infratemporal fossa by entering the pterygopalatine fossa where it gives off its terminal branches ( infraorbital, sphenopalatine, descending palatine and pharyngeal)
      3. Mandibular division of the trigeminal nerve (V3), otic ganglion (PS)
        • Branches of motor division: (a) nerve to medial pterygoid muscle, (b) masseteric, (c) anterior and posterior deep temporal, (d) nerve to lateral pterygoid, (e) buccal (exception,this is a sensory nerve)
        • Branches of sensory division: (a) inferior alveolar, (b) lingual, auriculotemporal, (d) mylohyoid (exception, this is a motor nerve)
  4. Submandibular triangle
    • Boundaries
    • Content: (1) submandibular gland (superficial part), (2) hypoglossal nerve, (3) facial artery, (4) facial vein, (5) submandibular lymph nodes, (6) mylohyoid nerve
  5. Oral cavity
    • Upper and lower dental arches. Oral vestibule. Oral cavity proper
    • Dentition: temporary, permanent. Dental quadrants
    • Oral vestibule (buccal and labial): parotid duct opens
    • Oral cavity proper:
      • Submandibular ducts open
      • Multiple ducts of sublingual glands open
      • The tongue is its main occupant
  6. Paralingual space:
    • Location, boundaries and content
  7. Tongue: dorsum of tongue,
    • Extrinsic muscles (bilateral): genioglossus, hyoglossus, styloglossus.
    • Intrinsic muscles (bilateral): superior and inferior longitudinal, transversus, verticalis
    • Nerve supply