Temporal And Infratemporal Fossae Flashcards
Temporal Fossa Boundaries:
Temporal Lines
Posterior and Superior
Temporal Fossa Boundaries:
Frontal and Zygomatic bones
Anterior
Temporal Fossa Boundaries:
Zygomatic Arch
Lateral
Temporal Fossa Boundaries:
Infratemporal crest of the sphenoid (best seen when the zygomatic arch has been removed)
Inferior
The contents of the temporal fossa are:
1) Temporalis muscle and fascia
2) Deep temporal vessels and nerves
3) Superficial temporal vessels
4) Auriciulotemporal nerve
Infratemporal Fossa Boundaries:
Posterior aspect of maxilla
Anterior
Infratemporal Fossa Boundaries:
Lateral pterygoid plate
Medial
Infratemporal Fossa Boundaries:
Ramus of the mandible
Lateral
Infratemporal Fossa Boundaries:
Inferior surface of the greater wing of the sphenoid
Superior
Infratemporal Fossa Boundaries:
The tympanic plate and the mastoid and styloid processes of the temporal bone
Posterior
Infratemporal Fossa Boundaries:
site of attachment of the medial pterygoid to the mandible near its angle
Inferior
The _____________ joint is a synovial joint; as well as a modified hinge joint.
Temporomandibular
An ____________ disc, composed of _________, divides the temporomandibular joint into two compartments.
Articular
Fibrocartilage
The ________ compartment of the temporomandibular joint is responsible for gliding movements of protrusion and retrusion.
Superior
The _________ compartment of the temporomandibular joint is responsible for hinge movements of depression and elevation.
Inferior
There are _____ muscles of mastication. Name them:
These muscles are innervated by branches of ____.
4 Temporalis m. Masseter m. Medial Pterygoid m. Lateral Pterygoid m.
V3 (the mandibular branch of trigeminal nerve)
Insertion of the Temporalis:
- Coronado process and anterior surface of the ramus of the mandible
Innervation of the Temporalis:
- Anterior and posterior deep temporal nerves
Actions of the Temporalis:
- Elevation of the mandible (closes mouth)
- Retrusion of the mandible
- Right and left lateral movements (grinding and chewing)
Origin of the Temporalis:
-Inferior temporal line, temporal fossa, temporalis fascia
Origin of the Masseter:
-Inferior border and medial surface of the maxillary process of the zygomatic bone and the zygomatic arch
Insertion of the Masseter muscle:
-Angle and lateral surface of the mandible.
Innervation of the Masseter muscle:
Masseteric nerve
