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SS > Infratemporal and Pterygopalantine fossa > Flashcards

Infratemporal and Pterygopalantine fossa Flashcards

1
Q

What are the three key muscles of mastication?

A

Temporalis
Maseter
Lateral pterygoid

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2
Q

Three ligaments of temperomandibular joint (atypical synovial)

A

Sphenomandibular
Lateral
Stylomandibular

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3
Q

Boundaries of infratemporal fossa

A

Medial- pterygoid process, pharynx and soft palate muscles (tenso veli palatine and levator veli palantine)
Lateral- ramus of mandible
Anterior-maxilla
Roof-greater wing of sphenoid and temporal bone

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4
Q

Contents of infratemporal fossa

A 
Sphenomandibular ligament
Lateral and medial pterygoid muscles
Maxillary artery (inferior alveolar artery and middle meningeal artery)
V3 (lingual, mental, inferior alveolar)
Pterygoid venous plexus
CN9
CN7
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5
Q

Branches and origin of maxillary artery

A

Originates from external carotid artery
Branches: Middle menegial artery
Inferior alveolar artery
Sphenopalatine

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6
Q

Boundaries of Pterygopalantine fossa

A

Medial-palantine bone
Roof-sphenoid bone and middle cranial fossa
Anterior-maxillary bone
Lateral-infratemporal fossa

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7
Q

Pterygopalantine fossa contents

A 
Maxillary division V2
Autonomic nerves
Foramen rotundum
Sphenopalantine foramen
Maxillary artery
Sphenopalantine artery
Pterygoid ganglion (hay fever)
Inferior orbital fissure
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8
Q

Which two nerve blocks relate to the pterygopalantine fossa?

A

Greater palantine nerve block

Posterior superior alveolar nerve block

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9
Q

Which artery causes posterior epistaxis?

A

Sphenopalantine artery

No blood out of nose but can taste blood at the back of the tongue

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10
Q

What is the venous drainage of the pterygopalantine fossa?

A

Pterygoid venous plexus

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11
Q

What does an atypical joint/temperomandibular joint have on one side?

A

Fibrocartilage on bony sources (no hyaline)

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12
Q

Muscles which protrude TMJ

A

Lateral and medial pterygoid muscles

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13
Q

Muscles which retract TMJ

A

Temporalis (posterior part)
masseter (deep)
geniohyoid
digastric

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14
Q

Muscles which elevate TMJ

A

Temporalis
Masseter
medial pterygoid

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15
Q

Muscles which depress TMJ

A

Digastric
geniohyoid
Mylohyoid

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16
Q

Branches of V3 in pterygopalantine fossa

A

Lingual nerve (joined by chorda tympani for oral cavity)
mental nerve
Inferior alveolar nerve

17
Q

Where does parotid gland get its parasympathetic innervation?

A

lesser petrosal nerve which runs with auricotemporal nerve

18
Q

Pterygoid ganglion

A

causes running nose and watery eyes-comes from V2 and sits in pterygopalantine fossa

19
Q

How does autonomic innervation enter pterygopalantine fossa

A

Greater petrosal nerve and sympathetic cervical ganglion form internal carotid plexus

SS (11 decks)

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