Lhermitte's sign.
Pearce
J M
JM
D006257:Head; D049673:History, 20th Century; D006801:Humans; D009068:Movement / Q000502:physiology; D009103:Multiple Sclerosis / Q000150:complications / Q000266:history*; D010292:Paresthesia / Q000209:etiology / Q000266:history*