A Computational Model of the Brain Cortex and Its Synchronization

Figure 2

Some of the simulation results of the excitatory groups. (a) illustrates the spiking type which is also the name of a neuronal group in our model, while the subscript (p2) means pyramidal cells located in layer (2) in the cortex (for more information about the excitatory groups in this model, please refer to Table 3). The first row represents the raster plot of the firing neurons and their temporal location per time (in our model 1 ms), with the -axis (0-2500) represents the number of neurons. Here, each dot represents a firing neuron, and by comparing the dot against -axis, we can know its number in the group (0-2500), and the time of firing can be read from the -axis (0-150); ms is the time of simulation process. The second row is the plot of membrane voltage of a single neuron which in our case is (RS) type (different spiking groups had been created according to the parameters shown in Table 2). The third row is variable , the recovery time or refractory period of this neuronal group, which is the time required by the neuron membrane to return to its reset potential after each spike; the fourth row is the dynamic variable , and finally, the fifth row is the firing rate which represents the number of spiking neurons per unit time which in our case milliseconds (ms). This stands for all the other plots (b, c, and d) in this figure which are the simulation output of the groups (, and ).

(a)

(b)

(c)

(d)