The lower division of the fourth lumbar nerve joins the fifth, and the lumbosacral trunk thus formed becomes part of the sacral plexus, which includes the first four sacral nerves. The branches ...

Research into leg pain patterns from damaged L5 and S1 nerve roots used MRI to analyze spinal injuries and found 50% to 80% of injuries corresponded to dermatome sensations. Shingles, also called ...

Disc herniation at L5-S1 is also possible and is a common cause of sciatica—a problem with the sciatic nerve that can cause ...

Inspection of his lower leg revealed marked muscle wasting with prominent fasciculations in the L4-S1 distribution ... consistent with a partial sciatic nerve injury, most likely secondary ...

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