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Types of Joints

QuestionAnswer
Another name for "joint" Articulation
Definition of a joint The point of contact between bones.
How many types of synovial joints are there? 6
What are the 6 synovial joints? -Ball and socket -Ellipsoid -Hinge -Saddle -Gliding -Pivot
Hinge Joint Allows only flexion and extension. Example: elbow (humeroulnar)
Saddle Joint A modified ellipsoid joint composed of convex and concave articulating surfaces - like two saddles. Ex:The joint between the trapezium (one of the small carpal bones in the wrist) & the first metacarpal bones.
Ball and socket Joint Capable of movement in every plane. A spherical surface of one bones fits into the dish shaped depression of another bone.
Ellipsoid Joint Consists of the oval-shaped end of one bone articulating with the elliptical basin of another bone. It permits flexion/extension & abduction/adduction as seen in the wrist (radiocarpal) joint.
Gliding Joint Is usually between two flat surfaces & allows the least amount of movement of all synovial joints. Only small shifting movements are possible @ these articulations. Ex: carpal bones in wrist or tarsal in the foot.
Pivot Joint Designed to allow one bone to rotate around the surface of another bone. Ex: Rotation of the head occurs because of the pivot joint between the 1st and 2nd cervical vertebrae (the atlantoaxial joint).
Synovial Joints Contain a joint cavity (absent in fibrous & cartilaginous joints). This space allows for movement at the synovial joint.
What type of joints have little or not movement capability? Fibrous and cartilaginous
Created by: BAC
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