Masseter Muscle

Masseter Muscle

“What is mass peristalsis? A detailed question and answers guide”

• Masseter muscle is quadrilateral in shape
• Masseter muscle is muscle of mastication
• Masseter muscle is two layers superficial and deep

Masseter muscle Origin:

• Superficial layer
  • Anterior 2/3rd of lower border of zygomatic arch
  • Zygomatic process of maxilla
• Deep layer
  • Deep surface of zygomatic arch

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Masseter muscle Insertion:

• Upper and anterior part of lateral surface of ramus of mandible
• Part of coronoid process

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Masseter muscle Nerve supply:

• Massetric nerve
• Branch from anterior division of mandibular nerve

Masseter muscle Actions:

• Elevates the mandible
• Superficial fibres help in protrusion
• Deep fibres help in retraction of mandible.

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Question 2. Movements of temporomandibular joint
Answer:

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Lingual nerve Origin:

• It is one of the terminal branch of the posterior division of trigeminal nerve

Lingual nerve Distribution:

• Sensory to anterior twothird of the tongue & floor of the mouth
• Secretomotor to Submandibular & Sublingual glands
• Gustatory to anterior twothird of the tongue