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Walking

• Very energy effeicient
• 2 phases: stance (support) phase and swing phase
• swing phase =
  • hip flexion by psoas innervated by lumbar spinal roots
  • pendulum effect (unless speed walking)
  • knee flexed by hamstrings (sciatic nerve)
  • knee then extended and locked by quadriceps (femoral nerve)
    • provides very stable platform for femur
  • heel strike
  • plantar flexion (tibial nerve)
  • hip abducted by gluteus minimus and maximus (superior gluteal nerve)
  • arms swung as counterbalance