Sciatic : Sciatic nerve injury is a known complication of shots in the butt (doctors, who like to use big words, call this a "gluteal intramuscular injection"). The sciatic nerve is formed by branches (called nerve roots) that come off the lumbar and sacral segments of the spinal cord. These nerve roots rearrange themselves (in something called the lumbosacral plexus), and combine to form the sciatic nerve. The sciatic nerve, which is the largest nerve in the human body, leaves the back of the pelvis by passing over a bony notch and under the piriformis muscle (about a third of the way over from your tailbone to your hip bone). This roughly corresponds to the "meatiest" area of the butt, making it an erroneously attractive target for the needle. The severity of sciatic nerve injury after injection varies with the injection site and with the substance that was injected (penicillin, diazepam and Chlorpromazine may be the worst culprits). Severity ranges from mild, temporary sensory disturbance to severe sensory disturbance and paralysis.
Answered 10/3/2016
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