1. Muscles of the Lower Extremity Inferior Half
Hip
Leg
Foot

2. Hip
Gluteus Maximus
Gluteus Medius

3. Gluteus Maximus Function: Extends and rotates the thigh
Origin: Pelvis and sacrum
Insertion: Femur (posterior)

4. Gluteus Medius Function: Extends and rotates the thigh
Sits above the gluteus maximus
Origin: pelvis (posterior)
Insertion: top of femur

5. Upper Leg
Sartorius
Quadriceps Muscles
Hamstring Muscles

6. Sartorius Function: flexes lower leg
Longest muscle in the body (anterior)
Origin: pelvis
Insertion: medial side of tibia
Muscle you use to:
- Play “Hacky Sack”
- Cross your legs – “Man style”

7. Quadriceps Muscles Quadriceps
4 muscles make up the “Quad” on the anterior side of leg
Vastus Medialis
Vastus Intermedius
Vastis Lateralis
Rectus femoris
Function: Extends the leg & knee and flexes of the hip & thigh

8. Quadriceps (Quads)
Origin: Lower part of the pelvis and top of the femur
Insertion: patella (knee cap)
Vastus Medialis (VMO)
Located on the inside of your thigh
Vastus Intermedius
Located next to the vastus lateralis
Vastus Lateralis
Located on the outside of your thigh
Rectus Femoris
Located next to the sartorius
Goes over all the vastus muscles and sits on top

10. Hamstring Muscles 3 muscles make up the hamstring
Biceps Femoris
Semimembranosus
Semitendinosus
They are located on the posterior side of the leg
Function: Flexes the knee and extends the thigh

11. Hamstring Muscles Origin: Back of Pelvis
Insertion: Tibia (medial & lateral)
Biceps Femoris
Lateral (insertion)hamstring muscle
Semimembranosus
Most Medial (insertion)hamstring muscle
Semitendinosus
Medial (insertion)hamstring muscle

13. Lower Leg Tibialis Anterior Extensor Digitorum Longus
Peroneus (Fibularis)Longus
Peroneus (Fibularis)Brevis
Gastrocnemius (Calf)
Soleus (Calf)
Flexor Digitorum Longus

14. Tibialis Anterior Function: flexes the foot muscle on your shin bone
Origin: Tibia
Insertion: Metatarsal

15. Extensor Digitorum Longus
Function: Moves your toes/digits 2-5
Origin: top of tibia and fibula
Insertion: Phalanges (2-5)
Located next to tibialis anterior on the outside of the leg

16. Peroneus Longus
Function: Flexes the foot; arch support muscle (side of leg)
Origin: Fibula
Insertion: Big toe (1st metatarsal)

17. Peroneus Brevis Function: Flexes foot; arch support muscle
Origin: shaft of fibula
Insertion: your little toe (outside lower leg)

18. Gastrocnemius
Function: (posterior) bends the knee; points the toes or plants the foot down
Origin: bottom of the femur
Insertion: heel bone (calcaneus)

19. Soleus
Function: (posterior) extends or depresses the foot when standing or walking; points the foot down
Origin: tibia and fibula
Insertion: heel bone (calcaneus)

20. Flexor Digitorum Longus
Function Flexes Second Through Fifth Toes, Inverts Foot, Weak Plantar Flexion Of Ankle
Origin Middle Posterior Surface Of Tibia
Insertion Distal Phalanges Of Second Through Fifth Toes