1. Muscles of the Anterior Thigh
Adductors and Quadriceps
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2. MUSCLES OF THE MEDIAL THIGH: ADDUCTORS

3. Fig. 53.—Muscles of Thigh (Anterior View).
1, Tensor fascia femoris; 2, ilio-tibial band; 3, vastus externus;4, gracilis ; 5, sartorius ; 6, rectus femoris ; 7, vastus internus ;8, ligamentum patella; 9, iliacus; 10, psoas ; 11, pectineus ;12, adductor brevis ; 13, adductor longus; 14, adductor

4. GRACILIS Most superficial adductor Gracilis= “slender”
Much larger in the cat
Unique in that it inserts on the tibia (along with sartorious)
GRACILIS

5. GRACILIS O- Pubis I- Medial epicondyle
A- Adducts thigh, flexes & medially rotates leg (at the knee)

6. Gracilis

7. “Adductors” Adductor Magnus (large) Adductor Longus (long)
Adductor femoris in cats
Adductor Longus (long)
Adductor Brevis (short)
deep to longus
won’t see in the cat
All ADDUCT, LATERALLY ROTATE, FLEX THIGH

8. ADDUCTOR MAGNUS O-inferior pubis/ischial tuberosity
I- linea aspera/medial epicondyle
A- Adducts thigh
Superior fibers: flex/laterally rotate thigh
Vertical fibers: extend thigh

9. ADDUCTOR LONGUS O-Pubis I- Middle 1/3 of linea aspera
A- Adducts, laterally rotates, flexes thigh

10. ADDUCTOR BREVIS O- Pubis I- Proximal linea aspera
A- Adducts, laterally rotates flexes thigh

11. PECTINEUS O- Pubis I- Distal to the lesser trochanter
A- Adducts & flexes thigh

13. Adductor femoris (magnus) adj
Adductor femoris (magnus) adj. to semimembranosus Adductor longus, Pectineus

14. Medial Thigh Muscles

15. MUSCLES OF THE ANTERIOR THIGH: QUADRICEPS

16. Quadriceps Rectus femoris (straight fibers) Vastus medialis (medial)
Vastus intermedius (middle)
Deep to rectus femoris
Vastus lateralis (lateral)
All muscles share the quadriceps tendon, which inserts on the patella, and continues as the patellar tendon to the tibial tuberosity
All muscles have the action of extending the knee

17. RECTUS FEMORIS O- anterior inferior iliac spine (AIIS)
I- patella>>tibial tuberosity
A- extends knee

18. VASTUS MEDIALIS VASTUS INTERMEDIUS VASTUS LATERALIS
O- VM: linea aspera
O- VI: anterior-lateral femur
O- VL: posterior-lateral femur
FOR ALL:
I- patella>>tibial tuberosity
A- extends knee

19. Rectus femoris, vastus medialis & lateralis

20. Patellar Tendon/Ligament

21. Other muscles of the ANTERIOR THIGH
SARTORIUS (sartor=tailor)
Longest muscle in the body
TENSOR FASCIAE LATAE (tensor = tightener, fascia = band, latus = wide)
Continuous with the iliotibial tract/band

22. SARTORIUS O- anterior superior iliac spine (ASIS)
I- medial, proximal tibia
A- Flexes, abducts, laterally rotates thigh; flexes knee
(like looking at the bottom of your shoe to see if you stepped in gum! 

23. SARTORIUS superficial; lateral to gracilis

24. TENSOR FASCIAE LATAE (TFL)
O- ASIS, iliac crest
I- iliotibial band>> lateral condyle of tibia
A- abducts thigh, stabilizes knee & hip

25. Tensor Fasciae Latae

26. Quiz yourself here…
Link