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Articulations
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Articulations Structure Function Fibrous Cartilaginous Synovial
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Articulations Structure Function Fibrous Cartilaginous Synovial Synarthroses Amphiarthroses Diarthroses
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distal tibio-fibular joint
Articulations Structure Function Fibrous Cartilaginous Synovial Synarthroses Amphiarthroses Diarthroses Sutures skull Syndes-moses distal tibio-fibular joint Gomphoses tooth
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distal tibio-fibular joint
Articulations Structure Function Fibrous Cartilaginous Synovial Synarthroses Amphiarthroses Diarthroses Sutures skull Synchon-droses epiphy-seal plate #1 sterno-costal joint Syndes-moses distal tibio-fibular joint Symphy-ses vertebral body joints pubic symphysis Gomphoses tooth
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all joints of the limbs, plus a few others
Articulations Structure Function Fibrous Cartilaginous Synovial Synarthroses Amphiarthroses Diarthroses Sutures skull Synchon-droses epiphy-seal plate #1 sterno-costal joint all joints of the limbs, plus a few others Syndes-moses distal tibio-fibular joint Symphy-ses vertebral body joints pubic symphysis Gomphoses tooth
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all joints of the limbs, plus a few others sutures of skull
Articulations Structure Function Fibrous Cartilaginous Synovial Synarthroses Amphiarthroses Diarthroses Sutures skull Synchon-droses epiphy-seal plate #1 sterno-costal joint all joints of the limbs, plus a few others sutures of skull distal tibio-fibular joint Syndes-moses distal tibio-fibular joint Symphy-ses vertebral body joints pubic symphysis #1 sterno-costal joint Gomphoses tooth
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all joints of the limbs, plus a few others sutures of skull
Articulations Structure Function Fibrous Cartilaginous Synovial Synarthroses Amphiarthroses Diarthroses vertebral body joints Sutures skull Synchon-droses epiphy-seal plate #1 sterno-costal joint all joints of the limbs, plus a few others sutures of skull distal tibio-fibular joint pubic symphysis Syndes-moses distal tibio-fibular joint Symphy-ses vertebral body joints pubic symphysis #1 sterno-costal joint Gomphoses tooth
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all joints of the limbs, plus a few others sutures of skull
Articulations Structure Function Fibrous Cartilaginous Synovial Synarthroses Amphiarthroses Diarthroses vertebral body joints all synovial joints Sutures skull Synchon-droses epiphy-seal plate #1 sterno-costal joint all joints of the limbs, plus a few others sutures of skull distal tibio-fibular joint pubic symphysis Syndes-moses distal tibio-fibular joint Symphy-ses vertebral body joints pubic symphysis #1 sterno-costal joint Gomphoses tooth
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JOINT STRUCTURAL TYPE FUNCTIONAL TYPE
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JOINT STRUCTURAL TYPE FUNCTIONAL TYPE
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JOINT STRUCTURAL TYPE FUNCTIONAL TYPE
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JOINT STRUCTURAL TYPE FUNCTIONAL TYPE
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JOINT STRUCTURAL TYPE FUNCTIONAL TYPE
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JOINT STRUCTURAL TYPE FUNCTIONAL TYPE
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Mandibular condyle Coronoid process Mandibular notch
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Articular capsule of the temporomandibular joint
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Mandibular fossa of the temporal bone
Articular disc of the temporomandibular joint Lateral pterygoid muscle Mandibular condyle Posterior belly of the digastric muscle Medial pterygoid muscle Masseter muscle Buccinator muscle
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Mandibular fossa of the temporal bone
Articular disk of the temporomandibular joint Mandibular condyle Lateral pterygoid muscle
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The lateral pterygoid muscle [cross-section] arises from the lateral pterygoid plate and the base of the greater wing of the sphenoid. It is composed of two heads. The superior head of the lateral pterygoid muscle inserts into the articular disc of the temporomandibular joint; the inferior head inserts into the pterygoid fovea on the ramus of the mandible. Two separate actions occur at the TMJ when the mouth is opened. The mandibular condyle rotates under the disk, and the disk translates anteriorly in relation to the articular fossa of the temporal bone. When the mouth closes this complex motion reverses, returning the disk to it’s resting place under the articular fossa Causes of Disk Derangement Chronic spasm of the lateral pterygoid muscle, trauma and arthritic changes, as well as defects of the bilaminar zone, can all lead to dysfunction and internal derangement of the TMJ (1). Two common patterns of derangement are recognized: Anterior disk displacement with reduction and anterior disk displacement without reduction. The first pattern is characterized by abnormal disk position with the mouth closed, and normal relationships of the disk, condyle and fossa with the mouth open. Anterior displacement without reduction indicates that the relationships of the three joint components are abnormal with the mouth both opened and closed (2).
![The lateral pterygoid muscle [cross-section] arises from the lateral pterygoid plate and the base of the greater wing of the sphenoid. It is composed of two heads. The superior head of the lateral pterygoid muscle inserts into the articular disc of the temporomandibular joint; the inferior head inserts into the pterygoid fovea on the ramus of the mandible.](http://slideplayer.com./slide/3468572/12/images/33/The+lateral+pterygoid+muscle+%5Bcross-section%5D+arises+from+the+lateral+pterygoid+plate+and+the+base+of+the+greater+wing+of+the+sphenoid.+It+is+composed+of+two+heads.+The+superior+head+of+the+lateral+pterygoid+muscle+inserts+into+the+articular+disc+of+the+temporomandibular+joint%3B+the+inferior+head+inserts+into+the+pterygoid+fovea+on+the+ramus+of+the+mandible..jpg "Two separate actions occur at the TMJ when the mouth is opened. The mandibular condyle rotates under the disk, and the disk translates anteriorly in relation to the articular fossa of the temporal bone. When the mouth closes this complex motion reverses, returning the disk to it’s resting place under the articular fossa Causes of Disk Derangement Chronic spasm of the lateral pterygoid muscle, trauma and arthritic changes, as well as defects of the bilaminar zone, can all lead to dysfunction and internal derangement of the TMJ (1). Two common patterns of derangement are recognized: Anterior disk displacement with reduction and anterior disk displacement without reduction. The first pattern is characterized by abnormal disk position with the mouth closed, and normal relationships of the disk, condyle and fossa with the mouth open. Anterior displacement without reduction indicates that the relationships of the three joint components are abnormal with the mouth both opened and closed (2).")
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Chronic symptoms of the head and neck can often be attributed to: A) Headache -- the temporalis muscle (it closes and clenches the jaw) B) Sinus pressure and pain -- the lateral pterygoid muscles (it moves the jaw side to side and/or forward) C) Neck stiffness and pain -- trapezius muscle (it stabilizes the skull during jaw clenching and grinding)
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The temporomandibular joint (tmj) is a synovial type joint separated by an interarticular disc. The disc splits the joint into two separate joints. The upper joint (ujc) is between the mandibular (articular) fossa of the temporal bone and the articular disk and provides a sliding motion when the lateral pterygoid contracts and pulls the condyle and disc forward. The lower joint (ljc) is between the articular disc and the head of the condyle of the mandible. The action here is a hinge-like action, in which the mandible drops, thereby opening the mouth. When dentition or muscle action is not in proper alignment, the joint can be secondarily affected and pain can ensue. This is TMJ disease and requires dental specialists to correct the problem.
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lateral meniscus anterior cruciate medial meniscus posterior cruciate
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