Femoral Shaft Flashcards

Study the femoral shaft, including its surfaces, borders, bony ridges, muscle attachments, blood supply, biomechanics, and clinical anatomy.

Card 1 of 30Question

What is the femoral shaft?

The long central portion of the femur extending between its proximal and distal ends.

In This Section

1. What is the femoral shaft?

The long central portion of the femur extending between its proximal and distal ends.

2. What is the characteristic curvature of the femoral shaft?

It is slightly convex anteriorly.

3. How is the femoral shaft oriented from proximal to distal?

It slopes inferiorly and medially toward the knee.

4. What is the typical cross-sectional shape of the middle femoral shaft?

Approximately triangular.

5. What are the three surfaces of the middle femoral shaft?

The anterior, medial, and lateral surfaces.

6. What are the three borders of the middle femoral shaft?

The medial, lateral, and posterior borders.

7. What is the linea aspera?

A prominent longitudinal ridge along the posterior surface of the femoral shaft.

8. What are the two principal lips of the linea aspera?

The medial and lateral lips.

9. What is the gluteal tuberosity?

A roughened proximal extension of the lateral lip of the linea aspera.

10. Which muscle inserts onto the gluteal tuberosity?

The gluteus maximus muscle.

11. What is the pectineal line of the femur?

A ridge extending from the lesser trochanter toward the proximal linea aspera.

12. Which muscle inserts onto the pectineal line?

The pectineus muscle.

13. Which thigh muscle inserts onto the middle third of the linea aspera?

The adductor longus muscle.

14. Which muscle inserts onto the proximal linea aspera and adjacent pectineal line?

The adductor brevis muscle.

15. Which portion of adductor magnus attaches extensively along the linea aspera?

The adductor portion of adductor magnus.

16. Which quadriceps muscle originates primarily from the anterior and lateral femoral shaft?

The vastus intermedius muscle.

17. Which quadriceps muscle originates partly from the lateral lip of the linea aspera?

The vastus lateralis muscle.

18. Which quadriceps muscle originates partly from the medial lip of the linea aspera?

The vastus medialis muscle.

19. Which short head of a hamstring muscle originates from the lateral lip of the linea aspera?

The short head of biceps femoris.

20. What is the function of the linea aspera in relation to the thigh's intermuscular septa?

It provides attachment for the medial and lateral intermuscular septa.

21. What are the medial and lateral supracondylar lines?

Distal continuations of the linea aspera that diverge toward the femoral condyles.

22. What is the popliteal surface of the femur?

A triangular posterior area of the distal femur between the supracondylar lines.

23. Which artery supplies much of the medullary cavity of the femoral shaft?

A nutrient artery, usually arising from a perforating branch of the deep femoral artery.

24. In which direction does the nutrient canal of the femoral shaft usually run?

Proximally, toward the hip.

25. Which arterial branches contribute to the periosteal blood supply of the femoral shaft?

Muscular and periosteal branches, particularly from the perforating arteries of the deep femoral artery.

26. What is the principal mechanical function of the femoral shaft?

To transmit body weight and muscular forces between the hip and knee.

27. What is a common mechanism of femoral shaft fracture in younger adults?

High-energy trauma, particularly motor vehicle collisions.

28. Why can femoral shaft fractures cause substantial blood loss?

Bleeding from injured bone and surrounding vessels can accumulate within the large thigh compartments.

29. What potentially life-threatening embolic complication can follow a femoral shaft fracture?

Fat embolism syndrome.

30. Why can femoral shaft fractures produce shortening of the affected limb?

Muscular traction may cause fracture fragments to overlap.