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Klein's line or the line of Klein is a virtual line that can be drawn on an X-ray of an adolescent's hip parallel to the anatomically upper edge of the femoral neck.It was the first tool to aid in the early diagnosis of a slipped capital femoral epiphysis (SCFE), which if treated late or left untreated leads to crippling arthritis, leg length discrepancy and lost range of motion.
Trethowan's sign is when Klein's line does not intersect the lateral part of the superior femoral epiphysis on an AP radiograph of the pelvis. [1] Clinical use
While hip flexors often get a lot of our attention (because, hello, tightness and aches!), the hip extensors can always use more love—which is why you should add these hip extension exercises to ...
Once the foot is flat on the ground, the hip gradually extends in preparation for weight acceptance as the whole-body moves forward over the stance foot. Between 30-50% of the gait cycle, the hip flexor muscles are eccentrically acting as the hip continues to extend, until reaching maximal extension at approximately 10-15 degrees past neutral. [3]
The backwards trunk lurch persists throughout the stance to maintain the gravitational force line behind the hip axis locking the hip into extension. There is an apparent forward protrusion of the affected hip due to exaggerated hip motion and the person may also hold the shoulders backward to keep the center of gravity behind the joint.
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The posterior fibres of gluteus medius contract to produce hip extension, lateral rotation and abduction. During gait, the posterior fibres help to decelerate internal rotation of the femur at the end of swing phase. Together with the gluteus minimus and other short pelvi-trochanteric muscles it centers and stabilises the hip.
Su, an orthopedic surgeon who specializes in a hip resurfacing procedure that has helped pro athletes return to top form, operated June 1 on Kane's right hip at the Hospital for Special Surgery in ...