Content:
Introduction: 0:00
Parts of Skeletal Muscle: 00:51
Muscles of Mastication: 01:44
Temporal Muscle: 02:04
Masseter Muscle: 02:40
Medial Pterygoid Muscle 03:11
Lateral Pterygoid Muscle 04:00


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Muscles of Mastication:
Temporal Muscle (Musculus Temporalis)
Origin:
Temporal fossa
○ Parietal bone – inferior temporal line
Insertion:
Coronoid process of the mandible
Processus coronoideus mandibulae
Function:
Elevates Mandible (Anterior Fibers)
Retracts Mandible (Posterior Fibers)


Masseter Muscle (Musculus Masseter)
Origin:
Zygomatic Arch
arcus zygomaticus
Insertion:
Masseteric Tuberocity of Mandible
tuberositas masseterica mandibulae
Function: Elevates Mandible


Medial Pterygoid Muscle (Musculus Pterygoideus Medialis)
Origin:
Superficial Part:
Pars superficialis:
Maxillary Tuberosity
Tuberositas maxillae

Deep Part:
Pars profunda:
Pterygoid Fossa of Pterygoid Process
fossa pterygoidea ossis sphenoidalis

Function:
Elevates Mandible (Bilateral Contracion)
Frictional masticatory movement (Unilateral Contracion)

Lateral Pterygoid Muscle (Musculus Pterygoideus Lateralis)

Origin:
Superior Head:
caput superius:
Infratemporal surface + Sphenoid Bone (Greater Wing)
Facies infratemporalis + alae majoris ossis sphenoidalis
Inferior Head:
caput inferius:
Lateral Lamina of Pterygoid Process (Sphenoidal Bone)
Lamina lateralis proce
Insertion:
Pterygoid Fovea of the Mandible
fovea pterygoidea mandibulae
ssus pterygoidei

Function:
Push mandible forward(Bilateral Contracion)

Frictional masticatory movement (Unilateral Contracion)