The low mass microdrive drive mounted on the subject precisely moves an electrode bundle along a linear track. The flexible tether carries motor control, electrode, and stimui signals to the moving subject. Minimal buffer electronics near the headstage boost the electrode signals entering the tether.

More preamplifier electronics at the supported end of the tether provide differential gain and filtering. An optional rotational commutator permits complete rotation of the moving subject. A standard multiconductor cable carries all signals between the subject enclosure and electronics rack.

An adapter merges motor control signals with amplified electrode signals, stimuli signals, and preamp power. The motor controller provides precision linear step control. A computer host usually directs it. There is also limited standalone capability. The electrode signals connect to a user supplied data acquisition system.