Critical Biomechanical Principals

In this section we are primarily dealing with normal gait and understanding how normal gait functions. In understanding normal gait, it is important to recognize six important criteria for normalcy (see figure 2.6) 

Six criteria for normalcy:

  1. The bisection of the lower 1/3 of the leg is parallel to the bisection of the calcaneus.
  2. The horizontal plane of the forefoot is perpendicular to the bisection of the calcaneus.
  3. There is a minimum 10° ankle dorsiflexion.
  4. Leg must be vertical to the ground in frontal plane.
  5. Leg must be vertical to the ground in sagittal plane.
  6. There is no horizontal plane rotation in limb above.


 

 

 

 

 

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