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Head & Neck Anatomy > Muscles of Mastication & Infratemporal Fossa > Flashcards

Muscles of Mastication & Infratemporal Fossa Flashcards

1
Q

Attachments of temporalis muscle

A

Inferior temporal line to coronoid process of mandible

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2
Q

Innervation of temporalis muscle

A

CN V3 (Mandibular division)

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3
Q

Action of temporalis muscle

A

Elevate mandible

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4
Q

Attachments of masseter muscle

A

Zygomatic arch to ramus of mandible

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5
Q

Innervation of masseter muscle

A

CN V3 (Mandibular division)

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6
Q

Action of masseter m.

A

Elevation of mandible

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7
Q

Attachments of medial pterygoid muscle

A

Medial surface of lateral pterygoid plate to internal angle of mandible

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8
Q

Innervation of medial pterygoid muscle

A

CN V3 (Mandibular division)

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9
Q

Action of medial pterygoid muscle

A

Elevate mandible

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10
Q

Attachments of lateral pterygoid muscle

A

Lateral surface of lateral pterygoid plate to neck of condylar process of mandible

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11
Q

Innervation of lateral pterygoid muscle

A

CN V3 (Mandibular division)

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12
Q

Action of lateral pterygoid muscle

A

Depresses and protracts mandible

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13
Q

How does the infratemporal fossa communicate with the pterygopalatine fossa?

A

Pterygomaxillary fissure (cleft between lateral pterygoid plate and maxilla)

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14
Q

How does the infratemporal fossa communicate with the orbit?

A

Inferior orbital fissure (between maxilla and greater wing of sphenoid bone)

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15
Q

Contents of infratemporal fossa

A
  1. Muscles of mastication (lateral and medial pterygoids, part of temporalis)
  2. Maxillary artery and branches
  3. Mandibular nerve (V3) and branches
  4. Otic ganglion
  5. Chorda tympani
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16
Q

What is the main blood supply to the face?

A

Facial artery (branch of external carotid)

17
Q

What is the path of facial artery?

A

Jogs across mandible before traveling up the face, travels under submandibular gland

18
Q

Main branches of V3

A
  1. Lingual nerve
  2. Inferior alveolar nerve
  3. Motor branches to muscles of mastication
  4. Motor to tensor tympani and tensor palatini muscles
  5. Motor fibers that travel with inferior alveolar nerve and branch with mylohyoid nerve to innervated mylohyoid and anterior belly of digastric

Head & Neck Anatomy (3 decks)

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