Emotional Processing Impairments in Apathetic Patients with Parkinson’s Disease: An ERP Study in Early Time Windows

Figure 2

Grand-averaged event-related potential (ERP) waveforms elicited at left and right occipital electrodes (O1 and O2). (a) ERP waveforms of O1 in the apathetic group. (b) ERP waveforms of O2 in the apathetic group. (c) ERP waveforms of O1 in the nonapathetic group. (d) ERP waveforms of O2 in the nonapathetic group. (e) ERP waveforms of O1 in the HC group. (f) ERP waveforms of O2 in the HC group.

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