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25 Cards in this Set

  • Front
  • Back
primary content of temporalis fossa is
temporalis muscle
Masseter muscle
• Attaches superior to
zygomatic arch
• Attaches inferiorly to the lateral surface of the ramus of the mandible
Masseter muscle • Innervated by
masseteric branch of V3
Temporalis muscle
• Attached to deep surface of
temporal fascia
• Inferior attachment is coronoid process of the mandible
Temporalis muscle
• Innervated by
deep temporal nerves (branches of V3) which enter from deep surface (accompanied by deep temporal arteries
Infratemporal Fossa
inferior to the zygomatic arch and deep to the ramus of the mandible
Sphenopalatine foramen
an opening in the medial wall of the pterygopalatine fossa that enters the nasal cavity
contents of
• Medial and lateral pterygoid muscles
• Branches of V3 and V2
• mylohyoid nerve innervates
mylohyoid muscle and anterior belly of digastric
mental nerve
It is a branch of the posterior trunk of the inferior alveolar nerve, which is itself a branch of the mandibular division of the trigeminal nerve (CN V).
lingual nerve • passes medial to
the 3rd mandibular molar tooth and innervates the mucosa of the anterior 2/3 of the tongue and floor of the oral cavity
lingual nerve sits on top of
medial pterygoid m.
Maxillary artery crosses
• Crosses either the superficial surface (2/3) or the deep surface (1/3) of the lateral pterygoid muscle.
• Middle meningeal artery enters the cranium via and supplies
foramen spinosum
dura matter
• Deep temporal arteries supply
deep surface of the temporalis muscle
• Masseteric artery: passes through and supplies
through the mandibular notch to enter the deep surface of the masseter mscle
• Buccal artery
• Enters pterygopalatine fossa after dividing into four branches
Lateral pterygoid muscle job
• depresses the mandible (opens the jaw)
Medial pterygoid muscle job
• Elevates the mandible (closes the jaw)
Dental anesthesia is produced by injecting an anesthetic agent into
the infratemporal fossa to block the mandibular nerve. This will anesthetize the mandibular teeth, lip, chin, and tongue.
Temporomandibular Joint
Between the condyle of mandible and mandibular fossa
• superior synovial cavity
gliding movements occur between the aricular disc and articular tubercle (protrusion and retraction)
• Inferior synovial cavity
hinge movements occur between the head of the mandible and the articular disc
• Articular disc sits within mandibular fossa and covers
condyle of the mandible
The articular disc becomes looser with age and starts to ride forward anteriorly over condyle so the back starts to
hit mandibular fossa causing a clicking noise because the disc is becoming loose.
*Mandible only dislocates anteriorly.