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Muscles of Mastication > Muscles of Mastication > Flashcards

Muscles of Mastication Flashcards

1
Q

What are the 4 muscles

A

Temporalis

Masseter (mass eater)

Med and Lat Pterygoid (behind mandible), originate from medial and lateral pterygoid plates

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2
Q

Blood supply to these muscles

A

Maxillary artery

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3
Q

Innervation

A

Mandibular V3 (branch of trigeminal)

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4
Q

TMJ articulating surfaces

A

Mandibular fossa
articular tubercle of temporal bone
head of mandible

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5
Q

TMJ ligaments

A

Lateral
Sphenomandibular
Stylomandibular

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6
Q

TMJ innervation

A

CN V3 (auriculotemporal and masseteric branches)

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7
Q

TMJ artery

A

Superficial Temporal Artery

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8
Q

Infratemporal fossa

A 
Ant- post maxilla
Post- mastoid and styloid process
Med-lateral pterygoid plate
Lat-ramus of mandible
Roof- greater wing sphenoid
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9
Q

Temporal fossa

A

Post Sup: temporal line
Ant: bones zygomatic and frontal
Lat: zygomatic arch
Inf: infratemporal crest

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10
Q

Infratemporal fossa contents (4)

A

Maxillary artery (term. branch arterial supply of face and neck- external carotid)
Otic ganglion (PARASYMP. GANGLION JUST BELOW FORAMEN OVALE)
Inf part temporalis muscle
Lateral and medial pterygoid muscles

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11
Q

Temporalis

A

O- temporal line skull
I- CORONOID process mandible
A-elevates mandible, retrusion, lateral movements same side
I- CN V3

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12
Q

Masseter

A

O- ZYGOMATIC ARCH
I- lateral surface mandibular ramus
A- elevates mandible, closes jaw, protrusion, retrusion, lateral movement (grinding and chewing)
I- Trigeminal (CN 5), mandibular branch (CN V3)

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13
Q

Medial Pterygoid

A

O-Lat pterygoid plate
I-medial surface mandibular ramus
A-elevates mandible, close jaw, slide mandible from side to side (of opposite side), protrusion
I-‘’

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14
Q

Lat Pterygoid

A

O- lat pterygoid plate
I- medial surface mandibular ramus
A- OPENS JAW, protrudes mandible, lateral excursion (of opposite side)(slide from side to side)
I- ‘’

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15
Q

Upper lip innervation

A

CN V2

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16
Q

Lower lip innervation

A

CN V3

17
Q

BLOOD SUPPLY LIPS

A

upper and lower lip branches FACIAL ARTERY (BRANCH OF EXT. CAROTID)

18
Q

Oral region boundaries: CHEEKS

A

Ant: oral and mental regions
Post: parotid
Inferior: inferior border mandible
Superior: zygomatic

Blood: buccal branch of maxillary artery
Innervation: CN V3 (mandibular) buccal branch

Muscles of Mastication (1 decks)

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