Anatomy study note · Lower limb

Tibialis posterior

The deepest calf muscle; an inverter of the foot and a key support of the medial arch.

Key points

• Tibia + fibula + membrane → navicular tuberosity.
• Tibial nerve.
• Inversion; medial arch support.
• First tendon behind the medial malleolus.
• Limb muscles: in situ from limb-bud mesenchyme.
• Upper limb bud C4–T2; lower limb bud L2–S2.
• Skeletal muscle: multinucleated, peripheral nuclei, striated.
• Epimysium → perimysium → endomysium.

The full note in the atlas also covers

Origin · Insertion · Action · Nerve supply · Histology · Development

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 11, PDF pp. 1357, 1380, 1425
• Inderbir Singh’s Human Embryology, ch. 7, PDF p. 109; ch. 10, PDF pp. 142–145
• BRS Cell Biology & Histology, 7th ed., ch. 8, PDF pp. 135–144

More from the lower limb

• Tibiofibular joints
• Adductor brevis
• Adductor longus
• Adductor magnus
• Ankle joint
• Anterior tibial artery
• Biceps femoris
• Common fibular nerve
• Cruciate ligaments
• Deep fibular nerve
• Deep veins of the leg and foot
• Dorsalis pedis artery

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