Figure 4: NMI results from lesioned group (PD animal model) with endogenous neurochemical profile. On the x-axis: oxidation potential in term of applied voltage in volts (V). On the y-axis: current in nanoamperes (nA). NMI was conducted using the BRODERICK PROBE® laurate biosensor. Serotonin (5-HT), L-tryptophan (L-Trp) and neuropeptides (dynorphin and somatostatin) were present. Note that dopamine (DA) neurotransmitter was absent in lesioned group (PD).