Joints: Enablers of human movement

Joints in the human body can be Uniaxial, Biaxial or Triaxial. 

Uniaxial joints provide a single degree of rotational freedom. Hinge joints (elbows, fingers) & pivot joints (ulna & spoke, cervical vertebra) are uniaxial joints.

Biaxial joints provide two degrees of rotational or translational freedom. Saddle joints (thumb), Plane joints (ankles, ribs) & condyloid joints (wrist) are biaxial.

Triaxial joints provide all three degrees of rotational freedom. Ball and socket joints (hip, shoulder) are triaxial.

Credit: Udemy Course ' Biomechanics: The Physics Of Human Movement' by 'Emil Cordes' 


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