1. Anterior Posterior Medial Fascial Compartments of the Thigh
Fascia lata is connected to the linea aspera by
three intermuscular septa;
1- Medial intermuscular septum
2- Lateral intermuscular septum
3- Posterior intermuscular septum
Thus the deep fascia and septa divide the thigh into three compartment;
Anterior
Posterior
Medial
Contents of the Anterior Fascial Compartment of the Thigh
1-Muscles: Sartorius, iliacus, psoas, pectineus, and (quadriceps femoris)
2-Nerve supply: Femoral nerve

2. Rectus femoris Vastus lateralis Vastus medialis
The quadriceps femoris muscle
Consisting of:
1- The rectus femoris
2- The vastus intermedius
3- The vastus lateralis
4- The vastus medialis
Rectus femoris
Vastus lateralis
Vastus medialis

3. Quadriceps femoris is the main extensor of the knee joint
The quadriceps femoris muscle
Vastus intermedius
Remember
Quadriceps femoris is the main extensor of the knee joint
Nerve supply : femoral nerve
Ligamentum patellae

4. Contents of the medial fascial compartment
Muscles
ADDUCTOR LONGUS
ADDUCTOR BREVIS
ADDUCTOR MAGNUS
Nerve supply: Obturator nerve
Actions: Adducts thigh at hip joint

5. Contents of the Posterior Fascial Compartment of the Thigh
1-Muscles:
Biceps femoris
Semitendinosus
Semimembranosus
2-Nerve supply: Sciatic nerve
Biceps femoris

6. Semitendinosus
Semimembranosus
Adductor magnus

7. Sciatic Nerve A branch of the sacral plexu
Commonly terminates in the middle of the thigh
by dividing into Tibial Nerve
and Common peroneal

8. Popliteal Fossa
Is a diamond-shaped intermuscular space situated at the back of the knee

9. Contents of the popliteal fossa Popliteal artery and vein
The common peroneal nerve
Tibial nerve
The popliteal artery
AT the middle of the fossa
The popliteal artery is the deepest structure
While the vein is intermediate and the tibial nerve
Is most superficial

10. The deep fascia of the leg divides the leg into Three compartments;
Fascial Compartments of the Leg
The deep fascia of the leg divides the leg into Three compartments;
Anterior
Lateral
Posterior
Each having its own muscles, blood supply, and nerve supply.

11. The main actions of these muscles are to stand up on the heels)
Contents of the Anterior Fascial Compartment of the Leg
Selected Muscles:
Extensor digitorum longus
Extensor hallucis longus
The main actions of these muscles are
Extension of the foot at the ankle joint (dorsiflextion) to raise the toes up (in other words
to stand up on the heels)
Nerve supply of all the muscles of the anterior compartment of the leg:
deep peroneal nerve

12. Nerve supply: Superficial peroneal nerve
Contents of the Lateral Fascial Compartment of the Leg
Muscles:
Peroneus longus:
peroneus brevis:
Nerve supply: Superficial peroneal nerve

13. Contents of the Posterior Fascial Compartment of the Leg
The transverse septa of the leg divides the muscles of the posterior compartment
into superficial and deep groups
Deep group of muscles
Flexor digitorum longus
Flexor hallucis longus
Superficial group of muscles
Gastrocnemius
Soleus
Selected muscles
Selected muscles
Nerve supply: Tibial nerve

14. Superficial group of muscles
Gastrocnemius
Plantaris
Soleus

15. Deep group of muscles
Popliteus
Flexor digitorum longus
Flexor hallucis longus
Tibialis posterior

16. The femoral artery
In the femoral triangle, its pulse is easily felt just inferior to the inguinal ligament midway between the pubic symphysis and the anterior superior iliac spine.

17. The popliteal artery
The popliteal artery pulse is difficult to find, but usually can be detected on deep palpation just medial to the midline of the popliteal fossa.

18. The dorsalis pedis artery
Passes onto the dorsal aspect of the foot and anteriorly over the tarsal bones where it lies between and is parallel to the tendon of extensor hallucis longus and the tendon of extensor digitorum longus to the second toe.

19. The posterior tibial artery
Is palpable just posteroinferior to the medial malleolus between the heel and medial malleolus.

20. Muscles of the gluteal region

21. Gluteus maximus

22. Gluteus medius
Gluteus minimus
Innervation
Superior gluteal nerve

23. sciatic nerve

24. Clinical Notes
The great thickness of gluteus maximus muscle makes it ideal for intramuscular injections.
To avoid injury to the underlying sciatic nerve, the injection should be given well forward on
the upper outer quadrant of the buttock.

25. However, the upper lateral quadrant, most likely to be made by the
Gluteus medius muscle rather than the gluteus maximus muscle .
The gluteus maximus covers the posterior part only of the
Gluteus medius while the anterior part (which makes the upper lateral quadrant)
is covered by skin and fascia only
Therefore, the intramuscular injection will be injected into the gluteus medius muscle rather than gluteus maximus muscle