the joining of a chemical (referred to as an allosteric modulator) to a select spot on a receptor complex in such a way that influences the joining of various other elements to their receptor spots on the very same complex. Allosteric modulators change the balance of the desired receptor spot, and in so doing amplify or reduce the attraction of the receptor for some other molecules.

ALLOSTERIC MODULATION: "Allosteric modulation has a specific purpose, and if modified at all, can interfere with many other neurological processes."