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GENERAL ARTHROLOGY
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Synarthrotic Joints No joint capsule and no movement between adjacent bones Suture Dense Fibrous CT Gomphosis Fibrous Peridontal Ligaments Synchondrosis – Hyaline Cartilage Epiphyseal Line (plate) Synostosis – Bony Joints (Fused)
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Types of Sutures
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synchodroses
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SYMPHSIS
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Synovial Joint pg 215
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SYNOVIAL JOINT PERIOSTEUM LIGAMENT JT CAVITY FIBROUS CAPSULE
SYNOVIAL MEMBRANE ARTICULAR CARTILAGE
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3. Pivot Joint rotation Projection of bone 1 articulates within ring of bone 2 Also found in proximal end of radius pronation and supination
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BALL AND SOCKET
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Knee Joint Much more complex than elbow
Much less stable than other hinge joints Some gliding and rotation structurally 3 separate joints No single joint capsule
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Joint Shapes Saddle: articular surface both concave + convex
pg 225 Joint Shapes Saddle: articular surface both concave + convex side-to-side, back-forth movement (eg) carpometacarpal jt of thumb Ball + Socket: spherical head + round socket multiaxial movement (eg) shoulder, femur
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Bursae & Tendon Sheaths
Bursae: flat, fibrous sac w/synovial membrane lining Tendon Sheaths: elongated bursae that wraps around tendons 3 Factors in Joint Stability: Muscle Tone Ligaments Fit of Articular Surface pg 219
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pg 224 Joint Shapes Hinge: cylindrical end of 1 bone fits into trough shape of other angular movement-1 plane (eg) elbow, ankle, interphalangal Plane: articular surface in flat plane Short gliding movement (eg) intertarsal, articular processes of vertebrae
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Joint Shapes Condyloid: egg-shape articular surface + oval concavity
pg 225 Joint Shapes Condyloid: egg-shape articular surface + oval concavity side-to-side, back+forth movement (eg) metacarpophalangeal (knuckle) Pivot: round end fits into ring of bone + ligament rotation on long axis (eg) prox. radius/ulna, atlas/dens
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Representative Articulations
Temporomandibular Joint Mostly hinge joint, some gliding and rotation Articular disc
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Special Movements супінація і пронація Протракція (висування)
Ретракція (засування)
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BURSAE AND TENDON SHEATHS
CORACOACRMIAL LIGAMENT SUBACROMIAL BURSA TENDON SHEATH
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BIAXIAL JOINT(CONDYLOID/ SADDLE JOINT)
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ELBOW JOINT BICEPS TENDON TROCHLEA SYNOVIAL CAVITY BURSA
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MUTIAXIAL JOINTS(HIP JOINT) BALL AND SOCKET
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MOVEMENTS AT SYNOVIAL JOINTS(FLEXION/EXTENSION)
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FLEXION/EXTENSION VETEBRAL COLUMN
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FLEXION EXTESION LIMBS
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ADDUCTION/ABDUCTION/ CIRCUMDUCTION
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INVERSION/EVERSION
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Tendon Sheaths and Bursae
Bursa is saclike extension of joint capsule that extends between nearby structures allowing them to slide more easily past each other Tendon sheaths are elongated cylinders of connective tissue lined with synovial membrane & wrapped around a tendon numerous in hand and foot
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Total Knee Replacement
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Lab 12: Articulations Lab 6: Cartilage Connective Tissue
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TYPES OF SYNOVIAL JOINTS
1. PLANE JOINTS-ARTICULAR SURFACES ARE PLNE AND ALLOW ONLY GLIDING MOVEMENTS 2. HINGE JOINTS-CYLINDRICAL SURFACE OF ONE JOINT FITS IN THE TROUGH SHAPE OF THE OTHER. ALLOW MOVEMENT AROUND 1 AXIS 3. PIVOT JOINTS- THE ROUNDED END OF ONE BONE FORMS INTO A RING FORMED BY THE OTHER BONE PLUS A LIGAMENT.MOVEMENT OCCURS IN 1 AXIS 4. CONDYLOID- THE EGG SHAPED SURFACE OF ONE BONE FITS INTO THE CONCAVE SURFACE OF THE OTHER .ALLOW MOVEMENT IN 2 AXIS 5.SADDLE-ARTICULAR SURFACES IF BOTH BONES ARE CONCAVE AND CONVEX( SADDLE) BIAXIAL JOINT. 6. BALL AND SOCKET-SPHERICAL HEAD OF ONE BONE FITS INTO THE SOCKET OF THE OTHER. MUTIAXIAL JOINT
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DEFINITION- ARTHROLOGY IS THE SCIENTIFIC STUDY OF JOINTS , AND ARTICULATIONS.
SITE WHERE RIGID ELEMEMTS OF THE SKELETON MEET ARE CALLED ARTICULATIONS. CLASSIFICATION OF JOINTS: CLASSIFICATION BASED ON FUNCTION: CLASSIFICATION BASED ON STRUCTURE
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CLASSIFICATION BASED ON FUNCTION
SYNARTHROSES-IMMOVABLE JOINTS (sutures) AMPHIARTHROSES- SLIGHTLY MOVABLE JOINTS( FIBROUS CONNECTION)( intervetebral discs) DIARTHROSES-FREELY MOVABLE JOINTS( SYNOVIAL) SYNARTHROSES AND AMPHIARTHROSES ARE LARGELY RESTRICTED TO THE AXIAL SKELETON DIARTHROSES PREDOMINATE IN THE LIMBS
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CLASSIFICATION BASED ON STRUCTURE
BASED ON THE MATERIAL THAT BINDS THE BONES TOGETHER, AND ON THE PRESENCE OR ABSENCE OF JOINT CAVITY. FIBROUS JOINTS CARTILAGINOUS JOINTS SYNOVIAL JOINTS FIBROUS JOINTS- -BONES CONNECTED BY FIBROUS TISSUE -no joint cavity Sutures Syndesmoses Gomphoses
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CARTILAGINOUS JOINTS-
THE BONES ARE UNITED BY CARTILAGE THERE IS NO JOINT CAVITY Synchondrosis( hyaline cartilage unites the bones) Symphyses( fibrocartilage unites the bones) SYNOVIAL JOINTS- -MOST MOVABLE JOINTS IN THE BODY -THERE IS A JOINT CAVITY.( SYNOVIAL CAVITY, SYNOVIAL FLUID) -ARTICULAR CARTILAGE( COVERS THE ENDS OF THE OPPOSING BONES) -ARTICULAR CAPSULE( IT ENCLSES THE JOINT CAVITY.2 LAYERED) -REINFORCING LIGAMENTS -BURSAE -MOVEMENT VS STABILITY
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