BACKGROUND: Associative high-frequency electrical stimulation (HFS) of the supraorbital nerve in five healthy individuals induced long-term potentiation (LTP)-like or depression (LTD)-like changes in the human blink reflex circuit according to the rules of spike timing-dependent plasticity (Mao and Evinger. 2001). HFS given at the onset of the R2 component of the blink reflex (HFS(LTP... https://www.markymarkscott.com/product-category/1-00-1nn/