Temporal region
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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. Inferior: Zygomatic arch.

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TEMPORAL REGION

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Temporal region

TEMPORAL REGION


Temporal lines

Temporal Lines

  • Superior:

    For attachment of temporalis fascia.

  • Inferior:

    For attachment of temporalis muscle.


Boundaries

Boundaries

  • Superior and posterior boundary:

    Inferior temporal line.

  • Anterior boundary:

    Frontal process of zygomatic.

  • Inferior:

    Zygomatic arch.


Floor

Floor

  • Greater wing of sphenoid.

  • Squamous temporal.

  • Frontal.

  • Parietal.


Contents

Contents

  • Temporalis muscle.

  • Deep temporal nerve and arteries.

  • Zygomaticofacial nerve.


Muscles of mastication

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 mastication1

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 mastication2

Muscles of Mastication

  • Medial pterygoid:

    Lateral pterygoid plate and maxilla to medial surface of mandible near angle.

    Elevates, protracts (bilateral).

    Grinding (unilateral).


Muscles of mastication3

Muscles of Mastication

  • Temporalis:

    Temporal fossa and fascia to coronoid process.

    Elevates and retracts mandible.


Temporomandibular joint

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

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 ligaments1

TMJ Ligaments

  • Sphenomandibular ligament:

    Sphenoid spine to mandibular lingula.

    Lies medial to TMJ.


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