Figure 6: The investigation of the effects of noises on the estimation performance.

(a) The effects of different kinds of noises on the estimation results under both the normal and the Parkinsonian state. NS and PS represent the normal and Parkinsonian states respectively. The errors of the three estimated variables are represented by the blue, green and brown columns respectively. (b) The effects of the noise strength on the estimation performance of the membrane potential. The dotted and solid lines represent the normal and the Parkinsonian states respectively. (c) The effects of the noise strength on the estimation performance of the hidden properties under the Parkinsonian state. The dotted and solid lines represent the normal and the Parkinsonian states respectively.