Table of Contents
Positioning
The subject lies prone with the knee in 30° of flexion. The examiner stands level with the thigh and leans over the subject. One hand is on the ilium, the other presses against the distal end of the lower leg.
Procedure
Ask the subject to flex the knee, and resist the movement .
Common mistakes:
- In strong subjects the flexion of the knee can not be opposed if the trunk of the examiner is not positioned well over the leg.
- Hyperlordosis can provoke pain in the sacroiliac joints or lumbosacral junction.
Anatomical structures tested:
Muscle Function:
- Semimembranosus
- Semitendinosus
- Biceps femoris
Common pathological situations:
- Pain in the thigh is due to a lesion of the hamstrings,
- Weakness is a common sign in first and second root palsies.
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