1. Set 8 Muscles Lower Leg

3. Gastrocnemius

4. Gastrocnemius Origin: Insertion: Action:
LATERAL HEAD – Lateral condyle and posterior surface of femur; capsule
of knee joint
MEDIAL HEAD – Medial condyle and adjacent part of femur; capsule of knee joint
posterior surface of calcaneus by means of calcaneal tendon (Achilles tendon)
plantar flexion and inversion of foot

5. Tibialis anterior

6. Tibialis anterior Origin: Insertion: Action:
lateral condyle of tibia, proximal 2/3 of lateral surface of tibia
plantar surface of base of first metatarsal and medial plantar surface of first tarsal
dorsiflexes and inverts foot at ankle

7. Gluteus minimus

8. Gluteus minimus Origin: Insertion: Action:
outer surface of ilium between anterior and inferior gluteal lines
anterior border of greater trochanter (femur)
abducts hip and rotates medially; lateral pelvic stabilizer

9. Flexor hallucis longus

10. Flexor hallucis longus
Origin:
Insertion:
Action:
Distal 2/3 of posterior surface of fibula
Plantar surface of base of distal phalanx of big toe (hallux)
Flexes big toe; aids in plantar flexion and inversion of foot; gives medial ankle stability

11. Flexor digitorum longus

12. Flexor digitorum longus
Origin:
Insertion:
Action:
Posterior surface of middle 3/5 of tibia
Divides into 4 tendons that insert on the plantar surfaces of bases of distal phalanx of the 2nd – 5th toes
Flexes phalanges of 2nd – 5th toes; plantar flexes and inverts foot

13. Extensor hallucis longus

14. Extensor hallucis longus
Origin:
Insertion:
Action:
Middle ½ of the anterior surface of the fibula and the adjacent interosseous membrane
Dorsal surface of base of distal phalanx of big toe (hallux)
Extends big toe; aids in dorsiflexion and inverts foot

15. Extensor digitorum longus

16. Extensor digitorum longus
Origin:
Insertion:
Action:
Lateral condyle of tibia, proximal ¾ of anterior surface of fibula
Divides into four tendons and inserts on middle and distal phalanx of 2nd – 5th toes
Extends phalanges of toes 2-5; dorsiflexes and everts foot

17. Fibularis (Peroneus) longus

18. Fibularis (Peroneus) longus
Origin:
Insertion:
Action:
Head and proximal 2/3 of lateral surface of fibula
Lateral margin of plantar surface of 1st tarsal and metatarsal
Plantar flexion and eversion of foot; gives lateral ankle stability

19. Soleus

20. Soleus Origin: Insertion: Action:
upper 1/3 fibula; middle 1/3 of tibia
on calcaneous with gastrocnemius by way of Achilles tendon
Plantar flexion and inversion of foot