piriformis

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Related to Piriformis muscle: Piriformis syndrome, Psoas muscle

piriformis

[‚pir·ə′fȯr·məs]
(anatomy)
A muscle arising from the front of the sacrum and inserted into the greater trochanter of the femur.
References in periodicals archive ?
Caption: FIGURE 5: Control CT and MRI of the pelvis 2 months later: osteolytic destruction of the massa lateralis with fluid around the piriformis muscle and the ilium bone.
Surgical evaluation of magnetic resonance imaging findings in piriformis muscle syndrome.
Keywords: Piriformis muscle syndrome Sciatic nerve MRI.
In the sacral plexus, entrapment of the sciatic nerve at the greater sciatic foramen (piriformis syndrome) may be secondary to asymmetry of the piriformis muscle size or anatomic variations in the course of the sciatic nerve relative to the piriformis muscle (Figure Obtaining a sequence perpendicular to the piriformis muscle is crucial in identification of these anatomic variants.
Later the hip turned black and blue, and my orthopedic doctor suspected I tore a hip abductor or piriformis muscle.
This study helps clarify that pain that radiates down the back of the leg is often of sciatic origin," Fishman said, and doctors should consider the possibility that the pain may be due to entrapment of the sciatic nerve by the piriformis muscle.
The nerve is then decompressed along its entire length, from the piriformis muscle and as close as possible to the spinal cord, to the distal Alcock's canal.
This puts chronic pressure on the piriformis muscle and can aggravate the sciatic nerve over time.
There's a muscle on John's leg, the piriformis muscle, and the nerve moves, so he feels pain.
Symptoms also may result from "pseudosciatica," or non-spinal causes, such as piriformis syndrome (a tightening of the piriformis muscle in the buttocks), or be mistaken for hip arthritis or trochanteric bursitis, an inflammation of a bursa sac in the hip.
Some of them, such as spondylolysis and piriformis syndrome (a condition in which the piriformis muscle irritates the sciatic nerve, causing pain ha the buttocks and referring pain along the course of the sciatic nerve), of ten are seen ha different sports or circumstances as well.
The onset is gradual, caused not only by wallets, but by any object (like carrying golf balls around) that presses on the piriformis muscle in the buttocks.