Figure 6. It depicts the time series (a) for 
when coupling intensity for nodes outside of the inboard spiral wave is changed from 
to 
.
(b) It depicts the time series for 
when coupling intensity for nodes inside of the outboard spiral wave is changed from 
to 
. No external forcing current is imposed on the network(
). The vertical coordinate represents number (difference) of neurons that point 
ever passed in certain transient period.