Infratemporal fossa Flashcards
Boundaries
Lateral pterygoid plate, ramus and coronoid process of mandible, infra temporal surface of greater wing of sphenoid, squamous part of temporal, posterior wall of maxilla, styloid process
What muscles are found in ITF?
Lateral and medial pterygoid muscle
What nerves in the ITF?
V3
Chorda tympani
Where does V3 leave the skull?
Fo. ovale
Where does chorda tympani leave the skull?
Facial canal of petrous temporal bone and enters middle ear
What does chorda tympani innervate?
Taste to the anterior 2/3 of the tongue
What artery and vein are found in the ITF?
Maxillary artery and vein
What ganglion is found in the IFT?
Otic ganglion
What are the contents of the ITF?
Lateral and medial pterygoid muscle. V3 Chorda tympani Otic ganglion Maxillary artery Maxillary vein
Which muscle is deep?
Lateral or medial pterygoid muscle
Medial
What are the 2 heads oft he medial pterygoid plate?
Deep and superficial head
Describe the branching of V3 in ITF
Through fo. ovale and splits into anterior and poster division.
Anterior division gives long buccal nerve.
Posterior division gives lingual n, inferior alveolar n, n to mylohyoid, auriculotemporal n.
What are the innervations of anterior division of V3?
Mostly motor except fro long buccal nerve which is sensory to the skin over buccinator and posterior mandibular teeth
What are the innervation fo the posterior division of V3?
Mostly sensory except for nerve to mylohyoid which is motor to mylohyoid and anterior digastric.
Lingual nerve provides general sensory innervation to anterior 2/3 of tongue, mandibular buccal gingiva
Inferior alveolar nerve provides sensory innervation to the mandibular tooth substance and lingual gingiva.
Auriculotemporal nerve supplies to external ear, skin of the temple and temporomandibular joint
What are the 2 parts of the lateral pterygoid muscle?
Superior and inferior head
What are the 3 parts of the maxillary artery?
Relating to the lateral pterygoid muscle
What are the branches of the 1st part of the maxillary artery?
Inferior alveolar artery, middles meningeal artery, (deep auricular, anterior tympanic, accessory meningeal)
What are the branches of the 2nd part of the maxillary artery?
Muscular and cutaneous branches
Were is the 3rd part of the maxillary artery?
Pterygopalatine fossa
What are the attachments of the medial pterygoid muscle?
To the lateral pterygoid plate and maxillary tuberosity superiorly.
Attached to the angle of the mandible inferiorly
What are the attachments of the lateral pterygoid muscle?
To the lateral pterygoid plates and roof of infratemporal fossa (sphenoid).
Posteriorly to the capsule fo the temporomandiblar joint
What is the function of the medial pterygoid muscle?
Elevates the mandible
What is the function of the lateral pterygoid muscle?
Inferior head is a protractor, superior head is an elevator
What is the maxillary artery a branch of?
Terminal branch of external carotid artery
Where does middle meningeal artery enter the skull?
Fo. spinosum
What are the tributaries of the maxillary vein?
Correspond to branches of the artery
What does maxillary vein drain into?
Retromandibular vein
