Example of signal recording and single-unit sorting in the normal OB.

<p>A: the top traces correspond to the filtered signal ( Hz) from electrodes (channel ). The black arrows indicate the spikes corresponding to the neuron in channel and neuron in channel . B: scatter plot of waveform peak-to-peak amplitudes recorded in channel vs. channel . Two clusters clearly emerge, corresponding to the single-unit activity shown in A. C: An example of the spike waveforms of the clusters shown in B.