http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. Good mental health and clear thinking depend upon our ability to store and manipulate thoughts on a sort of "mental sketch pad." In a new study, Yale School of Medicine researchers describe the molecular basis of this ability—the hallmark of human cognition—and describe how a breakdown of the system contributes to diseases such as schizophrenia and Alzheimer's disease. http://medicalxpress.com/news/2013-02-human-cognition-slow-firing-neurons.html Neuroscience Wed, 20 Feb 2013 12:17:02 EST news280584997 Facial expressions have been called the "universal language of emotion," but people from different cultures perceive happy, sad or angry facial expressions in unique ways, according to new research published by the American Psychological Association. http://medicalxpress.com/news/2011-09-perception-facial-differs-cultures.html Psychology & Psychiatry Thu, 01 Sep 2011 10:41:41 EST news234092488