Memory loss may not always be the first warning sign that dementia is brewing – changes in behavior or personality might be an early clue. Researchers on Sunday outlined a syndrome called “mild behavioral impairment” that may be a harbinger of Alzheimer’s or other dementias, and proposed a checklist of symptoms to alert doctors and…

The brain’s nerve cells communicate by firing messages to each other through junctions called synapses, and problems with those connections are linked to disorders like Alzheimer’s and epilepsy. Now Yale University researchers have developed a way to picture synapses in living brains. The technique reported Wednesday, using PET scans, is highly experimental but it raises…