![]() ![]() Finally, because of the attachment and action of piriformis, the SI joint can become involved, creating pain and dysfunction.Because of this, both trigger point pain and nerve compression pain may be present. As it shortens, it increases in girth, further compressing the nerve. Trigger points occur in taut bands of muscle fibre that cause the affected muscle to shorten. Trigger points refer pain and other symptoms such as paresthesia locally and some distance from their location.Therefore, if piriformis fills the space snugly, any contraction or shortening of the muscle will compress the nerve. Normal contraction of piriformis will increase its girth. As with other entrapment syndromes, an increase in the size of the contents passing through an available space contributes to compression. ![]()
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January 2023
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