Muscular System Part #2

• External intercostals


  • Elevates rib cages during inspiration
• Internal intercostals


  • Depresses rib cage during forced exhalation
• External oblique


  • Compresses abdominal wall
  • Trunk rotation and lateral flexion (horizontally)
• Internal Oblique


  • Compresses abdominal wall
  • Trunk rotation and lateral flexion
• Rectus Abdominis


  • Flexes vertebral column
• Iliopsoas


  • Flexion of thigh/hip
• Quadriceps Femoris Group


  • Extends knee (lower leg)
• Hamstring group


  • Extend thigh/hip and flex knee (lower leg)
• Tibialis Anterior


  • Dorsiflexes of foot/ankle
• Gastrocnemius


  • Plantar flexes foot/ankle
  • Flexes knee
• Soleus


  • Plantar flexes foot