Occasionally there can be very specific sensory symptoms like Lhermitte's sign, which is when an electric shock runs down the back and radiates to the limbs when a person bends their neck forward.

有时，会出现特殊的感觉症状，比如莱尔米特征：当人前屈颈部时，出现沿背部放射到四肢的电击感。