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TMJ - Ch.13

Temporomandibular Jt.

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