The Temporal, Infratemporal And Pterygopalatine Fossae Flashcards
(95 cards)
What are the boundaries of the temporal fossa? (On lateral side of skull)
Superiorly and posteriorly by the superior and inferior temporal line.
Anteriorly to the frontal and zygomatic bones
Inferiorly to the zygotes arch
What is the roof of the temporal fossa?
Formed by the thick temporalis fascia that covers the temporalis muscle
The temporal fossa contains, the H-shaped suture at the junction of the frontal, parental, temporal and sphenoid bones. What is this called?
Pterion
What are the contents of the temporal fossa?
Temporalis muscle
Deep temporal nerves/vessels
Auriculotemporal nerve
Superficial temporal vessels
With which fossa does the temporal fossa communicate?
The infratemporal fossa
What are the boundaries of the infratemporal fossa?
Deep to and below the zygomatic arch
Medial to the ramus of the mandible and behind the posterior aspect of the maxilla.
What is the roof of the infratemporal fossa?
By the portion of the sphenoid bone that contains the foramen ovale (V3) and the foramen spinosum (for middle meningeal a) and the mastoid process and stylohoid process of the temporal bone.
What does the infratemporal fossa contain?
A portion of the parotid gland M/L pterygoid muscles (mastication) Maxillary artery Pterygoid venous plexus Motor and sensory branch of V3
The _____ _____ provide surgical approach for the treatment of tumors (e.g. Maxillary sinus), to repair fractures of the skull base, and for the targeted delivery of drugs via the arterial system.
Infratemporal fossa
What are the four primary muscles of mastication?
Medial
Lateral pterygoid
Masseter
Temporalis
In what plane does the lateral pterygoid muscle lie?
Horizontal plane
Where does the superior head of the pterygoid muscle insert?
From the infratemporal surface of the sphenoid bone to the articular capsul
Where does the inferior head of the lateral pterygoid muscle insert?
From the lateral surface of the lateral pterygoid plate to the condylar process of the mandible
What is the origin of the medial pterygoid muscle?
Tuberosity of the Mancilla and the medial surface of the lateral pterygoid plate
What is the insertion of the medial pterygoid muscle?
Inner aspect of the angle of the mandible
Where do both of the pterygoid muscle attach?
Lateral pterygoid plate
Note: they attach at different sides of the plate
From where does the masseter extend?
From the inferior border and medial aspect of the zygomatic arch to the lateral surface of the ramus of the mandible
From where does the temporalis muscle extend?
From the bones of the themporal fossa to the coronoid process and anterior ramus of the mandible
What are the two proceses found on the ramus of the mandible?
Anterior: coronoid process
Posterior: condylar process
What does the notch of the mandible transmit?
The neurovasculr bundle to the muscles
What does the round head of the condylar process articulate with?
The temporal bone at the temporomandbular joint (TMJ)
What nerve passes through the mandíbulas foramen?
The inferior alveolar nerve
The _____ and ______ for a sling around the mandible and, acting in concert with the temporalis muscle, elevate the law and close the mouth.
The masseter and medial pterygoid
What is the primary depressor of the jaw?
The lateral pterygoid