Anatomy study note · Lower limb

Fibularis longus

A lateral-compartment muscle whose tendon crosses the sole in the cuboid groove; it everts the foot and supports the arches.

Key points

• Lateral fibula → base of MT1 + medial cuneiform (across the sole).
• Superficial fibular nerve.
• Eversion + plantar flexion; tie of the transverse arch.
• 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. 1354, 1380, 1426
• 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

• Fibularis tertius
• Flexor digitorum longus
• Flexor hallucis longus
• Gastrocnemius
• Gluteal nerves
• Gluteus maximus
• Gluteus medius
• Gluteus minimus
• Gracilis
• Great saphenous vein
• Hip joint
• Inguinal lymph nodes

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