Transcript TEMPORAL REGION

TEMPORAL REGION
Temporal Lines

Superior:
For attachment of temporalis fascia.

Inferior:
For attachment of temporalis muscle.
Boundaries

Superior and posterior boundary:
Inferior temporal line.

Anterior boundary:
Frontal process of zygomatic.
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Inferior:
Zygomatic arch.
Floor
Greater wing of sphenoid.
 Squamous temporal.
 Frontal.
 Parietal.

Contents
Temporalis muscle.
 Deep temporal nerve and arteries.
 Zygomaticofacial nerve.

Muscles of Mastication

General characteristics:
All innervated by mandibular branch of CN V.

Masseter:
Zygomatic bone to lateral surface of ramus
and coronoid process.
Elevates and protracts mandible.
Muscles of Mastication

Lateral pterygoid:
Lateral pterygoid plate and sphenoid to
front of mandible and TMJ.
Protracts mandible; depresses chin
(bilateral).
Grinding (unilateral).
Muscles of Mastication

Medial pterygoid:
Lateral pterygoid plate and maxilla to
medial surface of mandible near
angle.
Elevates, protracts (bilateral).
Grinding (unilateral).
Muscles of Mastication

Temporalis:
Temporal fossa and fascia to coronoid
process.
Elevates and retracts mandible.
Temporomandibular Joint

Synovial joint:
Between head of mandible (condyloid
process) and mandibular fossa of temporal
bone.
Intervening cartilage:
Divides joint into superior and inferior
compartments.
Allows mandible to protract and retract as
well as elevate and depress.
TMJ Ligaments

Temporomandibular ligament:
Base of zygomatic process to
mandibular neck.

Stylomandibular ligament:
Styloid process to angle of mandible.
Runs between parotid and
submandibular glands.
TMJ Ligaments
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Sphenomandibular ligament:
Sphenoid spine to mandibular lingula.
Lies medial to TMJ.