The piriformis muscle (PM) is well-known in medicine as a significant muscle of the posterior hip. It is a muscle that has a role in controlling hip joint rotation and abduction, and it is also a muscle made famous due to its ‘inversion of action’ in rotation. The PM also garners attention due to its role in ‘piriformis syndrome,’ a condition implicated as a potential source of pain and dysfunction.
Piriformis syndrome can be defined as a medical condition in which the piriformis muscle, located in the buttock region, spasms and causes buttock pain. The Sciatic Nerve may be irritated by the interaction between the SN and the PM, producing posterior hip pain down the posterior thigh, imitating ‘sciatica.’
Complaints of buttock pain with the referral of symptoms are not unique to the Piriformis Muscle. Symptoms are widespread with more clinically evident back pain syndromes. It has been indicated that piriformis syndrome is accountable for 5-6 percent of cases of sciatica. In the majority of instances, it happens in middle-aged individuals and is far more prevalent in women.
PM is a thick and bulky muscle. As it passes out of the pelvis through the greater sciatic foramen, it divides the foramen into the suprapiriform and infra-piriform foramina. As it courses anterolaterally through the greater sciatic foramen, it tapers out to form a tendon attached to the superior-medial surface of the greater trochanter, commonly blending with the common tendon of the obturator internus and Gemelli’s muscles.
The nerves and blood vessels in the suprapiriform foramen are the superior gluteal nerve and vessels. In the infra-piriformis fossa are the inferior gluteal nerves and vessels and the sciatic nerve (SN). Due to its large volume in the greater sciatic foramen, it can compress the numerous vessels and nerves that exit the pelvis.
PM is closely associated with the other short hip rotators that lie inferior such as the superior gemellus, obturator internus, inferior gemellus, and obturator externus. The primary difference between the PM and other short rotators is the relationship to the SN. The PM passes posterior to the nerve, whereas the other rotators pass anterior.
Typical symptoms of piriformis syndrome include:
If this fails, then the following has been suggested:
Therapist-directed interventions such as stretching the PM and direct trigger point massage have always been advocated.
The piriformis muscle is a solid and powerful muscle that runs from the sacrum into the femur. It runs beneath gluteal muscles; the nerve travels beneath them. If this muscle goes into spasm, then the nerve creates radiating pain, numbness, tingling, or burning out of the buttocks to the leg and foot. Other people develop the syndrome while dealing with chronic low back pain.
Activities and motions that cause the piriformis muscle to contract further compress the sciatic nerve, causing pain. This muscle contracts once we squat, or stand, walk, go up steps. It tends to tighten when we sit at any position for more than 20 to 30 minutes.
Individuals with a history of chronic low back pain frequently assume that their radiating sciatic pain is traceable to their lower spine. Their history of disc herniations, or sprains, strains have taught them to assume that it will go away like normal and that the pain is out of their spine. It is just when the pain doesn’t respond as usual that individuals seek therapy, thus delaying their recovery.
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