Patent ID: 8849392

Claim:
A method of identifying a region of the brain comprising the steps of: measuring neuronal firing and local field potential by recording electrical signals in the brain using at least a first electrode and a second electrode; detecting neuronal spiking activity that is oscillatory within a beta frequency band between 15 Hz and 30 Hz using at least the first electrode, wherein the detecting comprises determining a peak frequency within the beta frequency band range having a largest power spectrum peak and determining a power value within a predetermined frequency range about the peak frequency to represent beta oscillatory activity of the patient; comparing occurrence of the detected neuronal spiking activity with activity within the beta frequency band of the local field potential measured by at least the second electrode; determining counts of neurons exhibiting neuronal spiking activity occurring within the beta frequency band in relation to movement of the first electrode along an electrode track; and analyzing the counts of neurons exhibiting neuronal spiking activity along the electrode track to distinguish between a dorsal portion of the subthalamic nucleus and a ventral portion of subthalamic nucleus to identify the region of the brain.