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Flashcards in Joints II Deck (15):

3 types of Classification by Articulating Surfaces

Simple Joint, Compound Joint, Complex Joint


Simple Joint - description and example

only 2 articular surfaces involved, e.g. inter-phalangeal joint of a finger


Compound Joint - description and example

between more than 2 articulating surfaces, e.g. elbow joint


Complex Joint - description and example

articular disc intervenes in whole/part, between articulating surfaces, e.g. knee


3 types of classification of synovial joints by movement

Uni-axial Joint, Bi-axial Joint, Multi-axial Joint


Uni-axial Joint - description and example

allow movement in one plane only, e.g. elbow, only able to flex and extend


Bi-axial Joint - description and example

allow movement in 2 planes - e.g. wrist, flex, extends, abducts and adducts


Multi-axial Joint - description and example

allow movements in many planes - e.g. shoulder, flex, extends, abducts, adducts, medially and laterally rotates and circumducts


6 categories for classification of synovial joints by shape

Plane Joints (gliding), Hinge Joints, Pivot Joints, Ellipsoid Joints (condyloid), Saddle Joints, Ball & Socket Joints


Plane/Gliding Joints - description and examples

articular surface = flat/slightly curved, moves in any direction but slightly restricted by ligaments, e.g. carpel/tarsel bones or rib articulation with thoracic vertebrae


Hinge Joints - description and examples

Uni-axial Joints, strong ligaments laterally (collateral ligaments) to hold bones together without restricting normal movement of flexion and extension, e.g. interphalangeal joints or elbow joint


Pivot Joint - description and examples

Uni-axial Joints where a bony pivot is surrounded by a ring made partly of bone and partly of fibrous tissue, e.g. atlanto-axial where the atlas and the ligament rotate about the odontoid peg allowing rotation along the longitudinal axis or the superior radio-ulnar joint - allows rotation along the longitudinal axis


Ellipsoid Joint (condyloid) - description and examples

have 1 oval convex articular surface fitting into an elliptical concave articular surface, bi-axial, movement in 2 planes at right angles to each other, e.g. wrist (radio-carpal) permits flexion/extension/abduction/adduction or the knee which is a condylar joint, allows flexion/extension and rotation about the longitudinal axis


Saddle Joint - description and example

have reciprocal concavo-convex articular surfaces, saddle describes shape of articular surface, e.g. carpe-metacarpal joint of the thumb, allows flexion/extension/abduction/adduction and rotation


Ball & Socket Joint - desciption and examples

multi-axial joints, have cup-shaped concavity allowing movement around many axes - allows flexion/extension/abduction/adduction/medial and lateral rotation and circumduction