1)Name two important factors that contribute to the stability of the knee. How d

Question

1)Name two important factors that contribute to the stability of the knee. How do they stabilize the knee?

2)The word “sartorius" is a Latin word that means pertaining to a tailor. The muscle contracts to rotate your thigh in order to sit down on the floor in a cross-legged position, which tailors had to do frequently many years ago. Give one other muscle that contracts to rotate your thigh in the opposite direction in order to stand up from this position.

3)How would be able to differentiate the anterior and posterior views of the femur? How would you use this information to help you tell if you were looking at a left or right femur?

4)Name all of the muscles of the quadriceps group, and all of the muscles of the hamstrings group. What are the muscle actions of these two groups?

Explanation / Answer

1.

Factors responsible for stability of knee joint-

i. Anterior and posterior cruciate ligaments

ii. Medial and lateral collateral ligaments.

All of them support and stabilise the tibiofemoral joint.

2. Gluteus medius is a medial rotator of thigh.

3. A definite ridge can intertrochantric ridge(below head) and a definite line with two lips called linea aspera(on the shaft) are visible clearly in the poserior view of femur.

They are not visible in the anterior view.

After determining the anteror/posterior view, we can determine the side in which the head is placed medially. This side is the correct side.

4. Quadriceps femoris- Rectus femoris, Vastus lateralis, Vastus medialis, Vastus intermedius

Function- extension of knee joint. Rectus femoris also flexes the hip joint.

Hamstrings- semitendinosus, semimembranosus,long head of biceps femoris, ischial head of adductor magnus.

Function- flexors of knee and extensors of hip

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