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muscles of lower limb


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muscles of lower limb

  2. 2. Posterior compartment of calf muscles Superficial set muscles Gastrocnemius Soleus Plantaris
  4. 4. GASTROCNEMIUs It Is Large Superficial Muscle& Lies Superficial ToThe Soleus. The Two Heads & SoleusTogether To Form Triceps Surae ORIGIN Lateral head: Posterior Surface Of Lateral Condyle Of Femur And Highest Of Three Facets On Lateral Condyle. medial head: Posterior Surface Of Femur Above Medial Condyle INSERTION Tendo calcaneus to middle of three facets on posterior aspect of calcaneus
  5. 5. GASTROCNEMIUs NERVE Tibial nerve (S1, S2) Action Plantar flexes foot. Flexes knee
  6. 6. SOLEUS It Is A Sole Shaped Multipennate Muscle Lies Deep To The Gastrocnemius ORIGIN Soleal line Middle third of posterior border of tibia Upper quarter of posterior shaft of fibula including neck INSERTION Tendo calcaneus to middle of three facets on posterior surface of calcaneus
  7. 7. SOLEUS NERVE Tibial nerve (S1,S2) ACTION Plantar flexes foot (aids venous return) Anti graving muscle Steadies leg on foot when standing
  8. 8. plantaris it vestigeal in human beings. It has a short belly & a long tendon ORIGIN Lateral supracondylar ridge of femur above lateral head of gastrocnemius and oblique popliteal ligament of knee joint INSERTION Tendo calcaneus (medial side, deep to gastrocnemius tendon)
  9. 9. PLANTARIS NERVE Tibial nerve (S1, 2) ACTION Plantar flexes foot and flexes knee Assist gastrocnemius in action
  10. 10. POPLITEUS ORIGIN Posterior shaft of tibia above soleal line and below tibial condyles INSERTION Middle of three facets on lateral surface of lateral condyle of femur. Tendon passes into capsule of knee to posterior part of lateral meniscus
  11. 11. POPLITEUS NERVE Tibial nerve (L5,S1) ACTION Unlocks extended knee by lateral rotation of femur on tibia. Pulls back lateral meniscus
  12. 12. FLEXOR HALLUCIS LONGUS Lower Two Thirds Of Posterior Fibula Between Median Crest And Posterior Border, Lower Intermuscular Septum And Aponeurosis Of Flexor Digitorum Longus Base Of Distal Phalanx Of Big Toe And Slips To Medial Two Tendons Of Flexor Digitorum Longus
  13. 13. FLEXORHALLUCIS LONGUS NERVE Tibial Nerve ACTION Flexes Distal Phalanx Of Big Toe Flexes Foot At Ankle, Supports Medial Longitudinal Arch
  14. 14. FLEXOR DIGITORUM LONGUS Posterior Shaft Of Tibia Below Sole Al Line And By Broad Aponeurosis From Fibula Base Of Distal Phalanges Of Lateral Four Toes
  15. 15. FLEXORDIGITORUMLONGUS NERVE Tibial nerve (S1, S2) ACTION Flexes distal phalanges of lateral four toes and foot at ankle. Supports lateral longitudinal arch
  16. 16. TIBIALIS POSTERIOR Origin Upper Half Of Posterior Shaft Of Tibia Upper Half Of Fibula Between Medial Nerve Crest Interosseous Border, And Interosseous Membrane INSERTION Tuberosity Of Navicular Bone And All Tarsal Bones (Except Talus) And Spring Ligament
  17. 17. NERVE Tibial nerve (L4, L5) ACTION Plantar flexes and inverts foot Supports medial longitudinal arch of foot
  18. 18.  Peroneus longus  Peroneus brevis
  19. 19. Peroneus Longus it is superficial to peroneus brevis Origin Head Of Fibula, Upper 1/2 - 2/3 Of Lateral Fibular Shaft Surface; Also Anterior And Posterior Intermuscular Septa Of Leg Insertion Plantar Posterolateral Aspect Of Medial Cuneiform And Lateral Side Of 1st
  20. 20. Innervation Superficial Peroneal Nerve (L5, S1, S2); May Also Receive Additional Innervation From Common Or Deep Peroneal Nerves (L5, S1, S2) ArterialSupply Anterior Tibial And Peroneal Arteries Action Everts foot and plantar flexes ankle; also helps to support the transverse arch of the foot
  21. 21. PERONEUS BREVIS lies deep to peroneus longus ORIGIN Lower Two Thirds Lateral Shaft Of Fibula Anterior & Posterior Inter Muscular Septa INSERTION Tuberosity Of Base Of 5th Metatarsal
  22. 22. ACTION Weak plantar flexor of foot evertor of foot . Supports lateral longitudinal arch NERVE Superficial peroneal nerve (L5, S1)