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Anatomy > Infratemporal Region > Flashcards

Infratemporal Region Flashcards

1
Q

What are the muscles of the Infratemporal Region?

A

Temporalis (inferior portion)
Medial Pterygoid
Lateral Pterygoid

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2
Q

What is the origin of the Temporalis (inferior portion) muscle?

A

floor of temporal fossa and temporal fascia

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3
Q

What is the insertion of the Temporalis (inferior portion) muscle?

A

coronoid process and medial surface of ramus of mandible

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4
Q

What is the innervation of the Temporalis (inferior portion) muscle?

A

deep temporal nerve (CN V)

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5
Q

What is the blood supply of the Temporalis (inferior portion) muscle?

A

deep temporal branches of maxillary artery

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6
Q

What is the action of the Temporalis (inferior portion) muscle?

A

muscle of mastication

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7
Q

What is the origin of the Medial Pterygoid muscle?

A

medial surface of lateral pterygoid plate

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8
Q

What is the insertion of the Medial Pterygoid muscle?

A

internal surface of ramus of mandible

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9
Q

What is the innervation of the Medial Pterygoid muscle?

A

nerve to medial pterygoid (CN V)

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10
Q

What is the blood supply of the Medial Pterygoid muscle?

A

pterygoid branches of maxillary artery

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11
Q

What is the action of the Medial Pterygoid muscle?

A

muscle of mastication

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12
Q

What is the origin of the Lateral Pterygoid muscle?

A

lateral surface of lateral pterygoid plate

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13
Q

What is the insertion of the Lateral Pterygoid muscle?

A

TMJ and neck of condyloid process

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14
Q

What is the innervation of the Lateral Pterygoid muscle?

A

nerve to lateral pterygoid (CN V)

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15
Q

What is the blood supply of the Lateral Pterygoid muscle?

A

pterygoid branches of maxillary artery

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16
Q

What is the action of the Lateral Pterygoid muscle?

A

muscle of mastication

17
Q

What is noteworthy about the Lateral Pterygoid muscle?

A

only muscle of mastication that opens the mouth

18
Q

What are the boundaries of the Infratemporal Region?

A 
Laterally:  ramus of mandible
Medially:  lateral pterygoid plate
Superiorly:  infratemporal crest
Inferiorly:  angle of mandible
(contains the temporalis, medial and lateral pterygoid muscles, maxillary artery, pterygoid venous plexus, mandibular CN V, chorda tympani, otic ganglion)

Anatomy (17 decks)

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