microiontophoresis

noun
mi·​cro·​ion·​to·​pho·​re·​sis | \-(ˌ)ī-ˌänt-ə-fə-ˈrē-səs \
plural microiontophoreses\ -​ˌsēz \

Medical Definition of microiontophoresis 

: a process for observing or recording the effect of an ionized substance on nerve cells that involves inserting a double micropipette into the brain close to a nerve cell, injecting an ionized fluid through one barrel of the pipette, and using a concentrated saline solution in the other tube as an electrical conductor to pick up and transmit back to an oscilloscope any change in neural activity

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