kinesiology MOTION OF FEMUR ON PELVIS final .pptx

kinesiology ppt

1. PRESENTED BY:- IZERE CATIA PETER SIMON SHRUTI KOTHARI MOTION OF FEMUR ON PELVIS

2. MOTION OF FEMUR ON PELVIS The motions of the hip joint are easiest to visualize as movement of the convex femoral head within the concavity of the acetabulum as the femur moves through its three degrees of freedom: flexion/extension, abduction/adduction, and medial/lateral rotation. The femoral head will glide within the acetabulum in a direction opposite to motion of the distal end of the femur. Flexion and extension of the femur occur from a neutral position as an almost pure spin of the femoral head around a coronal axis through the head and neck of the femur. Sample footer text 3/1/20XX 2

3. MOTION OF FEMUR ON PELVIS The head spins posteriorly in flexion and anteriorly in extension. However, flexion and extension from other positions ( eg. , in abduction or medial rotation) must include both spinning and gliding of the articular surfaces, depending on the combination of motions. Sample footer text 3/1/20XX 3

4. Sample footer text 3/1/20XX 4

5. MOTION OF FEMUR ON PELVIS The motions of abduction/adduction and medial/lateral rotation must include both spinning and gliding of the femoral head within the acetabulum, but the intra-articular motion again occurs in a direction opposite to motion of the distal end of the femur. Flexion of hip is generally about 90 degrees with the knee extended and 120 degrees when the knee is flexed and when passive tension in the two joint hamstrings muscle is released. Hip extension is considered to have a range of 10 to 30 degrees. Hip extension ROM appears to diminish somewhat with age, whereas flexion remains relatively unchanged. When hip extension is combined with knee flexion, passive tension in the two-joint rectus femoris muscle may limit the movement. Sample footer text 3/1/20XX 5

6. MOTION OF FEMUR ON PELVIS Sample footer text 3/1/20XX 6 The femur can be abducted 45 to 50 degrees and adducted 20 to 30 degrees. Abduction can be limited by the two-joint gracilis muscle and adduction limited by the tensor fascia lata (TFL) muscle and its associated iliotibial (IT) band. Medial and lateral rotation of the hip are usually measured with the hip joint in 90 degrees of flexion; the typical range is 42 to 50 degrees. Femoral anteversion is correlated with decreased range of lateral rotation and less strongly with increased range of medial rotation. When the femoral head is torsioned anteriorly more than normal, lateral rotation of the femur turns the head out even more, both risking subluxation and encountering capsuloligamentous and muscular restrictions on the anterior aspect of the joint as the head presses forward. Hip joint rotation can correspondingly be affected by retroversion of the femur, as well as by acetabular anteversion and laxity of the joint capsule .

7. Sample footer text 3/1/20XX 7

8. THANK YOU Sample footer text 3/1/20XX 8