The Hip: Preservation, Replacement and Revision

Weight Release

- See:
      - Stance
      - Muscle Activity During Gait

- Discussion:
    - during last portion of single limb stance & entirety of wt release, tibial external rotation continues, ankle plantar flexion is seen, and sub-
           talar joint continues to invert;
    - forefoot is now in a less pronated position;
    - thru action of the windlass effect, intrinsic muscle activity, and posterior tibial activity, foot increases its rigidity and acts as rigid lever to 
           prepare for toe off;
    - gastroc-soleus muscle activity has stopped;
    - elasticity of musculotendinous complex acts against rigid lever of foot still in contact with the ground;
    - limb is being unloaded so that the elastic recoil allows the ankle plantarflexion;
    - this transfers energy to the limb to assist knee flexion in preparation for the swing phase of gait

Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Friday, September 9, 2011 12:16 pm