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23 Cards in this Set
- Front
- Back
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TMJ is split into 2 compartments by the... |
articular disc |
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joint formed with |
head of mandible mandibular fossa |
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articulator disc represents |
moveable socket for the head of mandible |
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the capsule is |
loose |
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which 2 ligaments act as guiding ligaments |
stylomandibular ligament sphenomandibular ligament |
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TMJ: artery |
superficial temporal artery |
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TMJ: nerve |
masseteric nerve (mandibular branch) - of trigeminal nerve |
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ligaments involved |
1. stylomandibular lig. 2. sphenomandibular lig. 3. stylohyoid lig. 4. lateral lig. |
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1. stylomandibular lig. |
from the styloid process (on temporal bone) to the angle of the mandible (inner side of angle of mandible) |
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2. sphenomandibular lig. |
from the spine of the sphenoid to the lingula of the mandible (inner view) |
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3. stylohyoid lig. |
from angle of mandible to the hyoid bone (inner view) |
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4. lateral lig. |
(outer view at mandibular condyle) reinforces the joint capsule |
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Movement: Elevation (close mouth) |
Temporal (strongest elevator of lower jaw) Masseter Medial pterygoid |
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Movement: Depression (open mouth) |
Lateral pterygoid suprahyoid infrahyoid |
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Movement: Protrusion (chin forward) |
lateral and medial pterygoid masseter |
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Movement: Retrusion (chin inwards) |
Temporal Masseter |
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Movement: Lateral (grinding & chewing) |
Temporal of same side pterygoids of opposite side masseter |
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Medial pterygoid m |
vertical & ends at the angle of mandible (inside) lateral is horizontal |
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Masseteric muscles: |
1. Masseter 2. Temporalis 3. Lateral pterygoid 4. Medial pterygoid |
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1. Masseter: arises from - inserts on - function - innervation - |
zygomatic arch massteric tuberosity closes mouth mesenteric nerve |
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2. Temporalis: arises from - inserts on - info - innervation - |
temporal fossa coronoid process of mandible strongest elevator of lower jaw deep temporal nerve |
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3. Lateral pterygoid: arises from -
inserts on- innervation - |
inferior head arise from pterygoid process superior head arise from infra temporal surface inserts on pterygoid fovea & articular disc of TMJ later pterygoid nerve |
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4. Medial pterygoid: arises from - inserts on- function - innervation - |
pterygoid fossa mandible elevates mandible and pushes it forward medial pterygoid nerve |
