Fig. 1. System configuration
E: Electrode; C: Computer; WM: Wireless module; S: Spectrometer; LS: Light source; TS: The section of the optical probe; ACC: Anterior cingulate cortex

Fig. 2. Comparisons of Δ[HbO] and Δ[Hb] obtained by two methods

Fig. 3. Changes of hemodynamic parameters of ACC in 10 minutes before and 10 minutes after the injection
(a): Δ[HbO]; (b): Δ[Hb]; (c): Δ[HbT]

Fig. 4. Changes of hemodynamic parameters of ACC in 10 minutes before and 60 minutes after the injection

Fig. 5. Statistics of the difference of hemodynamic parameters every 5 minutes

Fig. 6. The power ratio of local field potential (13~30 Hz) before and after the injection

Fig. 7. Difference statistics of power spectrum data of β wave every 5 minutes