Classication by structure:
Fibrous, cartilaginous, synovial
Classification by function
- Immovable beyond infancy.
-Sockets of teeth
-Conical Peg fits into socket
-Minimal or no movement
Slightly moveable joints.
-Syndesmosis- helf together by strong ligamentous structure that allow minimal movements between the bones.
- Inferior tibiofibular joint.
-Separated by fibrocartilage pad that allows slight movement.
-Symphysis pubis, intervertebral joints.
-Seperated by hyaline cartilage
-allows slight movement
joint capsule surrounds ends of bone forming joint.
Synovial capsule lines joint capsule
Area inside joint capsule= joint cavity
Thickened portions of capsule= ligament.
Ligaments may be contained:
-Within the capsule iteself.
-Intraarticularaly ---> ACL
-Extraarticularaly ---> LCL
fibular collateral ligament.
-helps protect ends of long bones. (Compressible and elastic)
-Relies on movement for feeding. (Works like a sponge)
Articular surface has low friction due to synovial fluit.
Some joint in this category have a fibrocarilage disk located between articular surfaces. (extra shock absorption.
Two flat bony surfaces that butt against one antoher.
limitied gliding movement
Biaxial ball and socket.
Allows movement in two planes without rotation.
Multiaxial ball and socket
movement in all planes
Shoulder and hip.
wide range of movement in only one plane.
Elbow, ankle, knee
Thumbs only-Carpometacarpal joint
Permits ball and socket movement. - with exception of slight rotation.
Pivot or screw joint
Rotation movement around long axis.
Radioulnar joint. -Rotation of radius