Joints

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Joints
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Joints

• A joints structure determines how it functions.
• The closer the bones fit the stronger the joint.
• Tightly fitting joints restrict movement.
• The looser the fit the greater the movement,
  although the joint is weaker.

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Types of joints.

• Ball and socket (hip, shoulder)
• Pivot (Atlas an axus)
• Hinge (elbow, fingers)
• Gliding (ankle, wrist)
• Saddle (thumb, ankle)
• Ellipsiod / Condyloid (knee)

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Ball and socket Joint

• Able to move in all direction.
• Also known as a multi-axial joint.

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Pivot joint

• Has only one axis and allows rotational movement
  only.

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Hinge Joint

• Has only one axis and allows flexion and
  extension only.

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Gliding joint

• Exists where bones with flat surfaces meet.
• It allows sideways, foreword and backward
  movement.

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Saddle joint

• Is a bi-axial joint.
• Moves sideways and back and forth.

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Ellipsoid or Condyloid Joint

• Often classified as a hinge joint.
• Allows a small amount of rotation.

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Synovial Joints

• Most common joint involved in sporting endeavours.

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Synovial Joints

• Joints are lubricated by "synovial" fluid.
• Connections called "synovial" joints are sturdy
  enough to hold the skeleton together and at the
  same time permit a range of motions.
• The ends of these joints are coated with
  cartilages which reduce friction and cushion
  against jolts.

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