Electrodes, consisting of thin wire strands, are implanted into specific areas of the brain.  Recordings of this brain cell activity are made by measuring the electrical potential of nearby neurons that are in close proximity to the electrode.

Electrodes are used to obtain a precise, real time measure and recording of electrical activity in the brain.   This method allows for finely detailed research in a localized area.  The limitations of this method are that it is invasive and that brain activity can only be recorded from the area, or areas, where the electrodes are located.

Application:  Single cell recordings can help form the basis for neural control of prosthetic devices.