Flashcards of Head and Neck Anatomy (Unit 11)

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The Parapharyngeal Space is Bounded Laterally by?
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Sternocleidomastoid muscle

What is the Action of Masseter Muscle?
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Elevation, Retrusion (deep and posterior fibers) and Ipsilateral excursion

What is the Action of Temporalis Muscle?
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Elevation (anterior and superior fibers) , Retrusion (posterior fibers), Ipsilateral excursion

Muscles of mastication are innervated by which Nerve?
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CN V3

What are the Names of Muscles of mastication?
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Masseter, Temporalis, Medial and lateral pterygoids

The Masticator Space is Bounded Medially by?
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Deep fascia—deep to mandibular ramus and medial pterygoid.

What are the Contents of Parapharyngeal Space?
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Carotid sheath and Deep cervical chain of lymph nodes

What is the Origin of Masseter Muscle?
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Superficial: Zygomatic process of maxilla, anterior 2/3 zygomatic arch. Deep: Zygomatic arch (inner posterior 1/3).

The Parapharyngeal Space is Bounded Posteriorly by?
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Vertebral column

The Masticator Space is Bounded Posteriorly by?
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Stylomandibular ligament.

What is the Insertion of Temporalis Muscle?
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Medial coronoid, anterior ramus (passing deep to zygomatic arch).

What is the Origin of Temporalis Muscle?
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Curvilinear lower temporal line. Temporal fossa. Temporal fascia

The Masticator Space is Bounded Laterally by?
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Lateral side of cervical fascia, masseter fascia, and temporalis fascia to superior temporal line.

The Masticator Space is Bounded Superiorly by?
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Limited by roof of infratemporal fossa and superior aspect of temporalis muscle.

What is the Origin of Medial pterygoid Muscle?
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Medial side of lateral pterygoid plate

What are the Contents of Masticator Space?
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Mandibular ramus and TMJ, Muscles of mastication, Mandibular nerve, Maxillary artery, Pterygoid plexus of veins and Chorda tympani nerve

The Parapharyngeal Space is Bounded Anteriorly by?
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Neck viscera

What is the Insertion of Masseter Muscle?
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Superficial: Angle of mandible. Deep: Lateral ramus

The Masticator Space is Bounded Anteriorly by?
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Anterior mandibular ramus and temporalis tendon

What is the Action of lateral pterygoid muscles?
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To protrude the mandible and move it toward the contralateral side

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