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Lhermitte sign is a sudden transient electric-like shock extending down the spine triggered by flexing the head forward. This happens due to a disorder such as compression of the cervical spine, multiple sclerosis, radiation damage to the spinal cord, cervical spondylosis, herniation of a cervical disc, a cervical spinal cord tumor, or subacute combined degeneration caused by vitamin B12 deficiency.

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10y ago

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