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Lhermitte's sign
System: Neurological Signs · All neurological signs
What it is — and how it is elicited
Flexing the neck triggers an electric-shock sensation that runs down the spine and into the limbs.
What a positive finding suggests
Associated with cervical cord lesions, classically multiple sclerosis; also reported with vitamin B12 deficiency and cord compression.
◈ Behind the name
Jean Lhermitte (1877–1959), French neurologist.
Related signs — Neurological Signs
Browse the L section of the A–Z list or return to the Clinical Signs hub.
Please note: This page is an educational reference about clinical examination signs. A clinical sign supports — and never replaces — a full clinical evaluation, examination and appropriate testing. A sign being present does not by itself prove a diagnosis, and an absent sign does not rule one out. If you have symptoms that worry you, see a health professional.