Aligned timeline for species and sensory systems in which the change in network dynamics has been examined. For animal models, each sensory system is shown separately, with species examined on individual lines. The main drives are shown at the top of the box with the ages of first observed cortical response for each species below. The vertical green box shows the beginning and end of the switch period with ages for each species bracketing it. Human infants are shown below for all sensory systems, which appear to develop responses on a similar time-course in anticipation of birth. References are as follows: Rat V1[,], mouse V1[,], ferret V1[-], rat S1[], ferret A1[*], human[,,,].