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18 February 2011Millimeter wave-induced changes in membrane properties of leech
This study evaluated a novel method for modulation of neuronal excitability using non-invasive
delivery of millimeter waves. Millimeter waves at 60 GHz and incident power density of 100-600
μW/cm2 were applied to three intact segmental ganglia of the adult leach, and intracellular neuronal
activity was recorded from the Retzius neurons using intracellular glass electrode. Transient dosedependent
increase in the plasma membrane permeability was observed. In addition, in one of the
examined neurons, a decrease in the neuronal firing rate was also evident. The results provide strong
evidence for the feasibility of modulating neuronal excitability using non-invasive delivery of millimeter
waves, and will be explored further for applications in basic neuroscience and treatment of neurological