Leg Bones and Muscles

Leg Bones and Muscles

Learning Objectives

• Identify major blood vessels and nerves in the leg.
• Identify leg bones and their features.
• Describe the three muscle compartments of the leg, including:
  • Muscles in each compartment
  • Actions of each muscle
  • Innervation of each muscle

Leg Bones

• Tibia: Located medially.
• Fibula: Located laterally.
• Proximal Tibiofibular Joint:
  • Connects the tibia and fibula proximally.
  • Does not bear a significant amount of weight; approximately 10% of body weight goes through the fibula.
  • Allows slight movement during ankle inversion and eversion.
• Interosseous Membrane:
  • Connects the shafts of the tibia and fibula.
  • Located between the tibia and fibula (inter- means between, -osseous means bone).
  • Divides the leg into anterior and posterior portions.
• Distal Tibiofibular Joint