Background-Reinforcement of behavioral responses involves a complex cerebral circuit engaging specific neuronal networks that are modulated by cortical oversight systems affiliated with emotion, memory, judgment, and decision making (collectively referred to in this study as the "extended reward and oversight system" or "reward-network"). We examined whether rewardnetwork brain volumes are reduced in alcoholics, and how volumes of subcomponents within this system are correlated with memory and drinking-history.

About 3% of MS patients experience their first symptom prior to the age of 18 years. Standardized follow-up is required after a first demyelinating attack in childhood, which may lead to earlier diagnosis and treatment of pediatric-onset MS.