"Researchers erase drug associated memories in mice and rats without affecting other memories. Researchers inhibited actin polymerization by blocking myosin II in the brains of rats and mice during the maintenance phase of methamphetamine related memory formation. Behavioral tests showed the animals persistently and immediately lost memories associated with methamphetamine, while no other memories were affected. This image is a brain scan of a person with methamphetamine addiction. Methamphetamine abuse decreases dopamine transporter activity and compromises mental function."