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...

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