The neurologist asks me to bend my head forward and immediately I feel a shock of sensation travel down my arms into my fingers. It’s kind of a vibration, buzzing, or tingling more than a shooting pain. I have just shown a positive L’Hermitte's sign.
The extra buzzing I felt is called a dysesthesia since the unusual sensation was provoked by bending my head forward, in contrast to a paresthesia which describes spontaneous tingling, buzzing, partial numbness, sharp pains, or electrical shocks. I get those too.
Not everybody experiences the L’Hermitte's symptom in the same way. For some patients, it is described as an intense electric shock which feels like you’ve just shoved a finger or toe into an electrical outlet. For some, it may just be a very subtle tingling in the fingers, legs, or toes. Or for others, the wave of sensation can also travel down the truck or upwards to the head.
I have been asked, “Is L’Hermitte's a sign or a symptom?”
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Signs vs. Symptoms: What is L'Hermitte's Sign?