The glass micropipet has become a convenient and popular tool for monitoring neural activity, even when the data to be obtained are all-or-none spike firing.  This is because they can be used to deliver water soluble chemical stains (e.g. fast green) and cells (e.g. horseradish peroxides) or test neuropharmacological responses.  For these applications, the investigator needs a recording system which is easily and quickly shifted among the different demands of extracellular recording (high gain, low noise, bandpass filtering and spike discrimination), intracellular recording (DC coupled, balanced polarization current passage) and iontophoresis (protecting delicate amplifiers from high compliance voltages).  That is the system featured above, a modular approach which lets you conveniently meet your needs now, yet grows and reconfigures easily as they change.  For example, if you want to display unit activity as a dot rather instead of the frequencygram shown above, replace the ISI-1 module with our RG-1 Raster Stepper - it's that easy!