Rectus Femoris Flashcards

Explore rectus femoris anatomy, including its two heads, pelvic attachments, femoral nerve supply, hip flexion, knee extension, and clinical relevance.

Card 1 of 30Question

Which compartment of the thigh contains the rectus femoris?

The anterior compartment of the thigh.

In This Section

1. Which compartment of the thigh contains the rectus femoris?

The anterior compartment of the thigh.

2. Which muscle group includes the rectus femoris?

The quadriceps femoris group.

3. Which four muscles form the quadriceps femoris?

Rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius.

4. How many principal proximal heads does the rectus femoris have?

Two, the direct head and the reflected head.

5. Where does the direct head of rectus femoris originate?

The anterior inferior iliac spine.

6. Where does the reflected head of rectus femoris originate?

The supra-acetabular groove of the ilium, superior to the acetabulum.

7. Which joint capsule is associated with the reflected head of rectus femoris?

The fibrous capsule of the hip joint.

8. Where does rectus femoris attach distally?

The base of the patella through the quadriceps tendon.

9. How is rectus femoris force transmitted from the patella to the tibia?

Through the patellar ligament to the tibial tuberosity.

10. Which two joints does rectus femoris cross?

The hip and knee joints.

11. What is the primary action of rectus femoris at the knee?

Extension of the leg at the knee joint.

12. What action does rectus femoris produce at the hip?

Flexion of the thigh at the hip joint.

13. Why is rectus femoris classified as a biarticular muscle?

It crosses and acts on two joints, the hip and knee.

14. Which nerve innervates rectus femoris?

The femoral nerve.

15. Which spinal nerve roots contribute to rectus femoris innervation?

L2, L3, and L4.

16. Which artery is a major source of blood supply to rectus femoris?

The lateral circumflex femoral artery, especially its descending branch.

17. Which major artery commonly gives rise to the lateral circumflex femoral artery?

The profunda femoris artery, also called the deep artery of the thigh.

18. Which veins drain blood from rectus femoris?

Muscular veins draining into the lateral circumflex femoral and femoral venous systems.

19. Which quadriceps muscle lies directly deep to rectus femoris?

Vastus intermedius.

20. Which quadriceps muscles lie on either side of rectus femoris?

Vastus medialis medially and vastus lateralis laterally.

21. Which quadriceps muscle is unique in crossing the hip joint?

Rectus femoris.

22. What is the general muscle fiber arrangement of rectus femoris?

Bipennate, with fibers arranged around a central intramuscular tendon.

23. What happens to rectus femoris length when the hip extends and the knee flexes?

The muscle lengthens across both joints.

24. When is rectus femoris particularly susceptible to active insufficiency?

During simultaneous hip flexion and knee extension, when it shortens across both joints.

25. Which physical activity commonly places high eccentric loads on rectus femoris?

Sprinting, particularly during the late swing phase.

26. Which proximal attachment of rectus femoris may sustain an avulsion fracture in adolescents?

The anterior inferior iliac spine.

27. Which clinical test can assess rectus femoris tightness?

The Ely test, which evaluates knee flexion with the hip extended.

28. What movement deficit may occur following femoral nerve injury affecting rectus femoris and the other quadriceps muscles?

Weakness of active knee extension.

29. Which deep tendon reflex assesses the quadriceps femoris muscle group?

The patellar tendon reflex, primarily involving spinal segments L2 to L4.

30. Which imaging modalities are useful for evaluating rectus femoris muscle and tendon injuries?

Musculoskeletal ultrasound and magnetic resonance imaging (MRI).