05/23/05 Review 1 Muscles of Mastication A. Jaw closing muscles 1. Masseter 2. Temporalis 3. Medial pterygoid B. Jaw opening muscles 1. Lateral pterygoid a) Inferior head b) Superior head 2. Anterior digastric
05/23/05Review1 Muscles of Mastication A.Jaw closing muscles 1.Masseter 2.Temporalis 3.Medial pterygoid B.Jaw opening muscles 1.Lateral pterygoid a)Inferior.
Dec 20, 2015
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05/23/05 Review 1
Muscles of Mastication
A. Jaw closing muscles1. Masseter
2. Temporalis
3. Medial pterygoid
B. Jaw opening muscles1. Lateral pterygoid
a) Inferior head
b) Superior head
2. Anterior digastric
05/23/05 Review 2
Origin: zygomatic process
of the maxilla and inferiorborder of zygomatic arch
Insertion:angle of the mandible
inferior, lateral side of ramus
Innervation:masseteric nerve
Function:elevate mandible
Masseter
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Origin:temporal fossa and
temporal fascia
Insertion:coronoid process of
the mandible
Innervation:temporal nerve
Function:elevate mandible
Temporalis
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Origin:pterygoid fossa
on medial surface of lateral pterygoid plate
Insertion:medial surface of
angle of the mandible
Innervation:medial pterygoid
nerve
Function:elevate mandible
Medial Pterygoid
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Sphenoid
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Origin ofMedialPterygoid
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Origin:lateral surface of
lateral pterygoid plate
Insertion:anterior neck of mandible
Innervation:branch of masseteric or buccal nerve
Function:pull condyle and diskalong the eminence
Lateral Pterygoid -- Inferior Head
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Origin ofLateralPterygoid,Inferior head
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Origin:infratemporal fossa of greater sphenoid wing
Insertion:anterior neck of themandible
Innervation:branch of masseteric or buccal nerve
Function:pull condyle and diskalong the eminence
Lateral Pterygoid -- Superior Head
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SuperiorHead ofLateralPterygoid
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Origin:posterior digastric mastoid notch of temporal bone
Insertion:anterior digastric lingual, inferior border of the mandible
Innervation:Posterior digastric--facial nerveAnterior digastric--mylohyoid, mandibular nerve
Function:Lower mandible, raise hyoid
Digastric
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ANTERIOR DIGASTRIC
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