Anatomy of the Tibia and Fibula

Overview

• Anatomical Leg: Area between the knee and the ankle.
• Bones Covered: Tibia and Fibula.
• Part of: Appendicular skeleton.
• Tip for Remembering:
  • "Never tell a little fib" - Fibula is the smaller bone and on the lateral side.

Views

• Right Leg:
  • Anterior/Front View: Left side of image.
  • Posterior/Back View: Right side of image.

Interosseous Membrane

• Also known as middle tibiofibular ligament.
• Function: Connects tibia and fibula, provides strength and stability, separates anterior and posterior muscles.

Tibia

• Position: Larger, medial bone.
• Name Origin: Latin for "shin bone".
• Function: Transfers weight from femur to foot.
• Proximal End:
  • Medial and Lateral Condyles: Articulate with the femur to form the tibiofemoral joint.
  • Intercondylar Eminence: Features tubercles and fossae for ligaments attachment.
• Anterior Features:
  • Tibial Tuberosity: Bump for patellar ligament attachment.
  • Anterior Crest: Shin area for deep fascia attachment.
• Fibular Notch: Depression for fibula attachment.
• Distal End:
  • Articular Surface: Articulates with talus bone at ankle joint.
  • Medial Malleolus: Bony inner ankle area, landmark for tibial pulse.

Fibula

• Position: Smaller, lateral bone.
• Function: Muscle attachment, not weight-bearing.
• Proximal End:
  • Head: Articulates with lateral condyle of tibia, attachment for muscles and ligaments.
• Shaft: Thin, ridged for muscle attachment.
• Distal End:
  • Lateral Malleolus: Outer ankle, articulates with talus, larger than tibia’s medial malleolus.

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