Applied Anatomy | |
Trendlenberg's gait | |
When
any of the features of lateral balance control fails, the supporting is
upset. The pelvis tends to fall on the unsupported side when the individual
stands on the affected limb. This is called Trendelenberg
sign. The person walks with a characteristic lurching or waddling
gait. In
A : Negative trendlenberg's test . The hip abductors are acting normally
tilting the pelvis upwards when the opposite leg is raised from the
ground Causes of such a condition include:
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Sciatic nerve | |
Can be compressed at lower border of gluteus maximus by sitting on a bench with a sharp edge. May be injured by misplaced deep intravascular injections. To prevent this, the injection is usually given in the superolateral quadrant. May be injured in posterior dislocation of the hip joint.
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Sciatic Hernia | |
Pelvic
structures may protrude through the greater sciatic foramen. This is called
sciatic hernia. It compresses the contents of the foramina and may present with pain, numbness and weakness in the lower limb if sciatic nerve is compressed. |
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Trochanteric bursitis | |
The
extensive bursa between the great trochanter and the gluteal aponeurosis
may be a site of infection. Patient |
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Snapping hip | |
In
this condition, a snap is heard and felt on certain hip movements. The
snap is attributed to slipping of a tendinous |
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Slipped disc | |
Pain
of a prolapsed or strained lumbar intervertebral disc if often referred
to the gluteal region or lateral aspect of the thigh. |
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Weaver's bottom |
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Inflammation of the bursa over the ischial tuberosity |
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Piriformis syndrome | |
When the sciatic nerve divides in the pelvis, the common peroneal nerve may exit either:
When it pierces piriformis, it may be compressed by contractions of this muscle. This causes piriformis syndrome. |
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Angle of inclination: The neck is about 5cm long and makes an angle of 125 ° with the shaft in males and in females (about 110° ). This is called the angle of inclination. It is widest at birth and diminishes with age till adolescence. |
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Angle of anteversion The neck is also tilted slightly forward at an angle of 10-15° . This is the angle of anteversion. The proximal border of the greater trochanter is level with the centre of the femoral head. |
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Bryant's triangle: With the patient lying supine:
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Nelaton's line: This is a line between the anterior superior iliac spine and the ischial tuberosity, with the patient in the supine position. The tip of the greater trochanter lies on or below this line. If it lies above the line, the femur has been displaced upwards. |
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Shoemaker's line: A line projected on each side of the body from the greater trochanter beyond the anterior superior iliac spine. The two lines normally meet in the midline at or above the umbilicus. If one femur is displaced upwards, the lines meet away from the midline. If both are displaced upwards the lines meet below the umbilicus. |