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Questions and Answers
What is the origin of the temporalis muscle?
What is the origin of the temporalis muscle?
- Temporal fossa (correct)
- Masseter
- Inferior temporal line
- Coronoid process
From where does the lateral pterygoid muscle's upper head originate?
From where does the lateral pterygoid muscle's upper head originate?
- Lateral surface of ramus of mandible
- Temporal fossa
- Infra-temporal surface of greater wing of sphenoid (correct)
- Superior temporal line
Which nerve supplies the medial pterygoid muscle?
Which nerve supplies the medial pterygoid muscle?
- Facial nerve
- Glossopharyngeal nerve
- Anterior division of mandibular nerve (correct)
- Hypoglossal nerve
What action is performed by the lateral pterygoid muscle?
What action is performed by the lateral pterygoid muscle?
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What is the main trunk that supplies the temporalis muscle?
What is the main trunk that supplies the temporalis muscle?
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Study Notes
Origin of Muscles
- The temporalis muscle originates from the temporal fossa and the deep surface of the temporal fascia.
Lateral Pterygoid Muscle
- The upper head of the lateral pterygoid muscle originates from the infratemporal surface and the greater wing of the sphenoid bone.
Innervation of Muscles
- The medial pterygoid muscle is supplied by the mandibular division of the trigeminal nerve.
Actions of Muscles
- The lateral pterygoid muscle performs the action of depression and protrusion of the mandible.
Blood Supply
- The main trunk that supplies the temporalis muscle is the deep temporal arteries.
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