Figure 2.

Potential changes between the postsynapses during associative learning that are later used to induce internal sensation of associatively learned items. (A) The illustration shows functional LINK formation between the two postsynaptic membranes B and D during learning. The functional LINK is transient and its formation is a function of the simultaneous activation of postsynapses B and D. A and C are the corresponding presynapses. (B) At a later time, when one the stimuli arrives, the functional LINK is re-activated, resulting in the activation of postsynaptic membrane D inducing the semblance of activity arriving from presynapse C. It is required to maintain the functional LINK in a re-activable state during the interval of time from associative learning to the exposure to one of the stimuli. [Figure was used after modification (Vadakkan, 2011)].