What is the Action of Masseter Muscle?
Elevation, Retrusion (deep and posterior fibers) and Ipsilateral excursion
The Masticator Space is Bounded Laterally by?
Lateral side of cervical fascia, masseter fascia, and temporalis fascia to superior temporal line.
The Masticator Space is Bounded Medially by?
Deep fascia—deep to mandibular ramus and medial pterygoid.
Muscles of mastication are innervated by which Nerve?
CN V3
The Parapharyngeal Space is Bounded Posteriorly by?
Vertebral column
What are the Contents of Parapharyngeal Space?
Carotid sheath and Deep cervical chain of lymph nodes
What is the Origin of Masseter Muscle?
Superficial: Zygomatic process of maxilla, anterior 2/3 zygomatic arch. Deep: Zygomatic arch (inner posterior 1/3).
The Masticator Space is Bounded Superiorly by?
Limited by roof of infratemporal fossa and superior aspect of temporalis muscle.
What is the Origin of Medial pterygoid Muscle?
Medial side of lateral pterygoid plate
What is the Insertion of Masseter Muscle?
Superficial: Angle of mandible. Deep: Lateral ramus
What are the Contents of Masticator Space?
Mandibular ramus and TMJ, Muscles of mastication, Mandibular nerve, Maxillary artery, Pterygoid plexus of veins and Chorda tympani nerve
What is the Insertion of Temporalis Muscle?
Medial coronoid, anterior ramus (passing deep to zygomatic arch).
What is the Action of Temporalis Muscle?
Elevation (anterior and superior fibers) , Retrusion (posterior fibers), Ipsilateral excursion
The Parapharyngeal Space is Bounded Anteriorly by?
Neck viscera
What is the Action of lateral pterygoid muscles?
To protrude the mandible and move it toward the contralateral side
The Parapharyngeal Space is Bounded Laterally by?
Sternocleidomastoid muscle
The Masticator Space is Bounded Anteriorly by?
Anterior mandibular ramus and temporalis tendon
The Masticator Space is Bounded Posteriorly by?
Stylomandibular ligament.
What is the Origin of Temporalis Muscle?
Curvilinear lower temporal line. Temporal fossa. Temporal fascia
What are the Names of Muscles of mastication?
Masseter, Temporalis, Medial and lateral pterygoids
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