1. Muscles of the Pelvis and Lower Limbs

2. Muscles of the pelvis and lower limb
Three functional groups
Muscles that work across the hip joint; move the thigh
Muscles that work across the knee joint; move the leg
Muscles that work across the joints of the foot; move the ankle

3. Muscles that move the thigh
Gluteal muscles
Adductors
Hip flexors
ALL have insertions on the femur and therefore cause movement of thigh

4. Gluteal muscles Cover the lateral surface of the ilia
Actions: extension, rotation, abduction at the hip
Gluteus maximus = largest and most posterior
Gluteus minimus = smallest; deep
Gluteus medius = intermediate
medius
maximus
medius
minimus

5. Adductors Actions: adduction Muscle strain = pulled groin Pectineus
Adductor brevis= shortest
Adductor longus= longest
Adductor magnus= largest
Gracilis

6. Pectineus
brevis
longus
magnus
gracilis

7. Iliopsoas
Actions: hip flexion
Two muscles
Psoas major
Iliacus

8. psoas
iliacus
Pectineus
brevis
longus
magnus
gracilis

9. Muscles that move the leg

10. Muscles that move the leg
Hamstrings (3 muscles)
Quadriceps (4 muscles)
Sartorius
ALL have insertions on the tibia and fibula and therefore cause movement of the leg

11. Hamstrings Action: knee flexion Three muscles Biceps femoris (lateral)
Semitendinosus (midline)
Semimembranosus (medial)

12. semitendinosus Biceps femoris semimebranosus Gluteus maximus
Add. magnus
semitendinosus
gracilis
Biceps femoris
semimebranosus

13. Quadriceps Action: extension of knee Four muscles Rectus femoris
Vastus lateralis = lateral
Vastus medialis = medial
Vastus intermedius = deep

14. Rectus femoris v. lateralis V. medialis iliopsoas pectineus
Add. longus
gracilis
Rectus femoris
v. lateralis
V. medialis

15. Sartorius
Action: hip flexion AND knee flexion
Assists the hamstrings

16. sartorius sartorius iliopsoas pectineus Add. longus gracilis
Gluteus maximus
pectineus
Add. longus
gracilis
Add. magnus
sartorius
semitendinosus
Rectus femoris
v. lateralis
gracilis
V. medialis
Biceps femoris
semimebranosus
sartorius

17. Muscles that move the foot

18. Muscles that move the foot
Tibialis anterior
Gastrocnemius
Soleus
Fibularis
ALL have insertions on the tarsals and metatarsals and therefore cause movement of the foot

19. Tibialis anterior Action: dorsiflexion
Microtears associated with “shin splints”

20. Gastrocnemius (“stomach” “knee”)
Calf muscle
Action: plantar flexion

21. Soleus Action: plantar flexion
Gastrocnemius and soleus share a common tendon, the Achilles tendon

22. Fibularis Actions: plantar flexion and eversion Fibularis
Tibialis anterior

23. gastrocnemius
soleus