Such a memory has properties that allow perception to alter recall and recall to alter perception. It has no fixed capacity limit, since it actually generates “information” by construction. It is robust, dynamic, associative, and adaptive. If our view of memory is correct, in higher organisms every act of perception is, to some degree, an act of creation, and every act of memory is, to some degree, an act of imagination. Biological memory is thus creative and not strictly replicative. It is one of the essential bases of consciousness, to the mechanisms of which we now turn.