Temporomandibular Jt.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Describe Depression - Action of TMJ | Opening mouth (sagittal plane)
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| Describe Protrusion - Action of TMJ | Pushing bottom teeth forward past upper teeth
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| Describe Retrusion - Action of TMJ | Pulling bottom teeth backward behind upper teeth
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| Describe Lateral movement - Action of TMJ | Mandible moves to the right or left
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| Describe Elevation - Action of TMJ | Closing mouth (sagittal plane)
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| Describe the joint actions for depression | Anterior rotation of condyle & sliding of disc & condyle anterior and inferior
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| Describe the joint actions for elevation | Posterior rotation of condyle & sliding of disc & condyle posterior and superior
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| Describe the joint actions for protrusion | Sliding forward - no rotation occurs
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| Describe the joint actions for retrusion | Sliding backward - no rotation occurs
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| Describe the joint actions for lateral movement | Same side spins & opposite side rotates
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| Name the action for the Temporalis muscle | Bilateral: Elevation & retrusion / Unilateral: Lateral deviation to the same side
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| Name the nerve for the Temporalis muscle | Trigeminal nerve (Cranial nerve V)
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| Name the action for the Masseter muscle | Bilateral: Elevation / Unilateral: Lateral deviation to the same side
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| Name the nerve for the Masseter muscle | Trigeminal nerve (Cranial nerve V)
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| Name the action for the Medial Pterygoid muscle | Bilateral: Elevation & protrusion / Unilateral: Lateral deviation to the opposite side
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| Name the nerve for the Medial Pterygoid muscle | Trigeminal nerve (Cranial nerve V)
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| Name the action for the Lateral Pterygoid muscle | Bilateral: Depression & protrusion / Unilateral: Lateral deviation to the opposite side
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| Name the nerve for the Lateral Pterygoid muscle | Trigeminal nerve (Cranial nerve V)
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| What is the nerve for the muscles of mastification? | Trigeminal nerve (Cranial nerve V)
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| Name the muscles of mastification who's action is elevation | Temporalis, masseter, & medial pterygoid
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| Name the muscles of mastification who's action is retraction (retrusion) | Temporalis
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| Name the muscles of mastification who's action is depression | Lateral pterygoid
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| Name the muscles of mastification who's action is protrusion | Medial & lateral pterygoid
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| Name the muscles of mastification who's action is lateral deviation to the left | Left temporalis & masseter and right medial & lateral pterygoid
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| Name the muscles of mastification who's action is lateral deviation to the right | Right temporalis & masseter and left medial & lateral pterygoid
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Created by:
srussel
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