Fossae Flashcards
What are the borders of the temporal fossae?
- Superior: Superior temporal line
- Inferior: Zygomatic arch
- Anterior: Frontal process of zygomatic, zygomatic process of frontal.
- Posterior: Superior temporal line
- Medial: Temporal, frontal, parietal, and greater wing of sphenoid.
What are the contents of the temporal fossa?
Temporalis muscle.
What is the arterial supply and venous drainage of the temporal fossa?
A: Superficial temporal, middle temporal, Anterior/posterior deep temporal
V: Superficial middle, anterior/posterior deep temporals, and maxillary.
What is the innervation of the temporal fossa?
- Deep temporal from V3 motor
- Auriculotemporal V3 cutaneous
- Zygomaticotemporal V2 cutaneous
What are the borders of the infratemporal fossa?
- Superior/roof
-Greater wing of sphenoid
-Foramen ovale and spinosum - Inferior/floor
-No anatomic floor
-Ends where medial pterygoid attaches to the
mandible - Lateral wall
-Ramus and coronoid process of mandible - Medial wall
-Lateral pterygoid plate
-Superior constrictor m.
-Palatine bone - Anterior wall
-Posterior maxilla - Posterior wall
-Temporal bone
What are the bony landmarks of the infratemporal fossa?
- Foramen ovale
- Foramen spinosum
- Mandibular fossa
- Petrotympanic fissure
- Inferior orbital fissure
- Pterygomaxillary fissure
What are the muscular contents of the infratemporal fossa?
- Temporalis m.
- Lateral pterygoid m.
- Medial pterygoid m.
- Sphenomandibular ligament
What are the arteries and veins of the infratemporal fossa?
A: 1st and 2nd parts of Maxillary artery, PSA of 3rd part.
V: Pterygoid plexus of veins
What are the nerve contents of the infratemporal fossa?
- V3
- Posterior superior alveolar n. (of V2)
- Chorda tympani (of VII)
- Otic ganglion
- Lesser petrosal n. (of IX)
What is the sphenomandibular ligament a part of? Attachements?
Extracapsular ligament of TMJ
-Attaches to sphenoid bone and lingula of mandible.
What goes through the foramen ovale in the infratemporal fossa?
- Mandibular nerve (V3)
- Lesser petrosal nerve (from IX)
- Emissary veins
- Traveling from cavernous sinus to pterygoid plexus
- Otic ganglion is directly inferior to the foramen ovale.
What is traveling through the foramen spinosum of the infratemporal fossa?
- Middle meningeal artery
- Middle meningeal vein
- Meningeal nerve (from V3)
What are the contents of the mandibular fossa?
TMJ
What are the contents of the petrotympanic fissure?
- Chorda Tympani (VII)
- Anterior tympanic a.
What are the contents of the inferior orbital fissure of the infratemporal fossa?
- Zygomatic n. and infraorbital n. of V2
- Ascending branches from pterygopalatine ganglion
- Infraorbital vessels
- Inferior division of ophthalmic v.
What does the pterygomaxillary fissure act as? Contents?
Acts as doorway between infratemporal and pterypalatine fossa.
- PSA n
- PSA a. v.
- 3rd part of Maxillary a.
- Pterygoid plexus
What are the borders of the pterygopalatine fossa?
- Superior wall/roof
-Greater wing of sphenoid and palatine bone - Inferior wall/ floor
-Pyramidal process of palatine bone - Anterior wall
-Maxilla - Posterior wall
-Sphenoid bone, pterygoid plates - Medial wall
-Palatine bone - Lateral wall
-None
-Open to the pterygomaxillary fissure and
infratemporal fossa
What are the major conents of the pterygopalatine fossa?
- Maxillary nerve V2
- Maxillary artery
- Pterygopalatine ganglion
What are the 7 openings of the pterygopalatine fossa, and where they lead to?
- Sphenopalatine foramen: to nasal cavity
- Foramen rotundum: middle cranial fossa
- Pterygoid (vidian) canal: Middle cranial fossa
- Inferior orbital fissure: Orbit
- Pterygomaxillary fissure: infratemporal fossa
- Palatovaginal calal: Nasopharynx
- Palatine canal: palate
What structures go through foramen rotundum?
V2 nerve
What structures go through the pterygoid (vidian) canal?
Nerve of pterygoid canal (vidian nerve)
Pterygoid a.
Vidian nerve peirces what structure to reach pterygoid canal?
Perices the cartilage that covers the foramen lacerum.
What structures go through the palatovaginal canal?
- Pharyngeal nerve of V2
- Pharyngeal artery
What goes through the palatine canal?
-Greater and lesser palatine nerves and vessels
what goes through the inferior orbital fissure?
-Infraorbital nerves (from V2) ASA (from V2) MSA (from V2) -Zygomatic nerve (from V2) Zygomaticotemporal n. Zygomaticofacial n. -Infraorbital a. and v. -Inferior ophthalmic v.
What are the structures of the sphenopalatine foramen?
- Nasopalatine n (V2)
- Sphenopalatine (nasopalatine) vessels
What is the arterial supply of the pterygopalatine fossa?
-3rd part of Maxillary a, except PSA
What is the venous drainage of the pterygopalatine fossa?
- Pterygoid plexus
- Inferior ophthalmic
What is the innervation of the pterygopalatine fossa?
Branches of V2
Vidian nerve