Electrical stimulation of brain may help people with schizophrenia learn to communicate better

FINDINGSUCLA researchers have found that people with schizophrenia were able to more accurately determine whether two auditory tones matched or differed, after receiving a type of electrical brain stimulation. Being able to distinguish tones is essential for verbal communication.BACKGROUNDPeople with schizophrenia have difficulty discriminating between tones of differing frequencies.  This is thought to impair their ability to interpret tone of voice, resulting in social difficulties. Transcranial direct current stimulation, or tDCS, is a non-invasive neural stimulation technique that passes a weak electrical current (equivalent to a nine-volt battery) through the brain, changi ng the ability of neurons to respond to stimuli. Scientists wanted to find out if tDCS — which comes in two active varieties, anodal or cathodal — could boost auditory processing in people with schizophrenia.METHODIn 12 people with schizophrenia, researchers applied tDCS via electrodes on the scalp to the auditory cortex, the part of the brain that processes auditory information. The participants received anodal stimulation, cathodal stimulation or a placebo stimulation for 20 minutes. Immediately following stimulation, subjects listened to pairs of tones and were asked whether they sounded identical or different. Cathodal stimulation was associated with significant improved tone discrimination ability. Researchers ’ next step is to see if the findings can be replicated in a larger group and to ...
Source: UCLA Newsroom: Health Sciences - Category: Universities & Medical Training Source Type: news