"piriformis muscle – see piriformis syndrome"
"The clinical symptom of sciatic neuropathy is sciatica and includes sharp pain and paraesthesia along the posterior thigh and lower leg including the lateral and plantar aspects of the foot. Numbness and weakness often develop more gradually than pain 3. Motor symptoms include foot drop and weakness in knee flexion and hip extension due to affection of the hamstring muscles 1-4. Achilles and hamstring reflexes might be diminished 2."
"Ultrasound can reveal nerve enlargement, hypoechogenicity and calliper changes as well as partial or complete loss of the fascicular pattern 6. It can be used to guide a nerve block 3."
"Displacement or course deviation, enlargement and increased signal intensity of the nerve are MR features of neuropathy 1,4. An obliteration of fat planes around the nerve, loss of its fascicular pattern or adjacent mass lesions are other possible findings 1."
"Denervation changes might be seen in the hamstring muscles in the posterior thigh including the short head and long head biceps femoris muscle, semimembranosus and semitendinosus as well as the hamstring component of the adductor magnus muscle and in all of the lower leg muscles 1."