Researchers at the University of California, San Diego School of Medicine have erased and reactivated memories in rats, profoundly altering the animals' reaction to past events. The study, published in the June 1 advanced online issue of the journal Nature, is the first to show the ability to selectively remove a memory and predictably reactivate it by stimulating nerves in the brain at frequencies that are known to weaken and strengthen the connections between nerve cells, called synapses. "We can form a memory, erase that memory and we can reactivate it, at will, by applying a stimulus that selectively strengthens or weakens synaptic connections," said Roberto Malinow, MD, PhD, professor of neurosciences and senior author of the study. In terms of potential clinical applications, Malinow, who holds the Shiley Endowed Chair in Alzheimer's Disease Research in Honor of Dr. Leon Thal, noted that the beta amyloid peptide that accumulates in the brains of people with Alzheimer's disease weakens synaptic connections in much the same way that low–frequency stimulation erased memories in the rats. "Since our work shows we can reverse the processes that weaken synapses, we could potentially counteract some of the beta amyloid's effects in Alzheimer's patients," he said.
Istoric In Romania, in vremea comunismului, pshiatrii au fost incadrati in APR, ramura a celorlalte ramuri medicale.Dupa 1989 APR si-a coninuat prezenta, fiind in continuare condusa de urmasii lui Predescu, Gorgos, Angheluta & co. APR se face vinovat in fata istoriei printr-o selectie mafiotica care a coborit psihiatria romaneasca la un instrument de persecutie a regimului fata deorice aspiratie de innoire,de respingerea a numeroase valori care n-au incaput in breasla si au trebuit sa emigreze sau sa fie marginalizati, perspectiveneavind decit cei hiperadaptati la teroarea raului. Persecutiile fata de psihiatrii si chiar fata de unii bolnavi sunt cunoscute. Text integral