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7v 8r Brain Stimulation Against Obsessive Compulsive Disorder | heise online - The Times Hub

Brain Stimulation Against Obsessive Compulsive Disorder | heise online

Brain Stimulation Against Obsessive Compulsive Disorder |  heise online

Customized electrical stimuli that are sent to the brain without surgery can alleviate obsessive-compulsive disorder for up to three months. This is what US researchers from Boston University write in the journal “Nature Medicine”.

People with obsessive-compulsive disorder experience recurring anxiety-inducing thoughts and compulsions. For example, they have to count, clean, or check items over and over again, even though they realize how excessive that is. If they try to suppress the compulsive actions, anxiety states occur.  The y try to distract themselves from this with the repetitions, which are perceived as a reward.

In their study, the Boston researchers concentrated on brain circuits in the forebrain above the eye sockets, which are important for learning according to the reward principle, but apparently no longer work correctly in OCD and show deviations in the beta-gamma wave range.

 The  researchers hoped that manipulating these brain rhythms could break the compulsive reward cycle.

Brain Stimulation Against Obsessive Compulsive Disorder |  heise online

Brain Stimulation Against Obsessive Compulsive Disorder |  heise online

 The  PhD student Shrey Grover from Robert Reinhart’s laboratory first had 60 test subjects complete a learning task and recorded their individual beta-gamma brain waves in the target area. He then divided the participants into three groups and stimulated the brain area using transcranial alternating current stimulation, i.e. non-invasively through the skull, in different ways: once closely adapted to their learning brain waves, once significantly lower-frequency than a kind of active placebo and the last group received as real placebo no simulation.

 The rapy lasted 30 minutes a day for five days. In fact, the personalized stimulation seems to lead to the test subjects not limiting themselves to just one possible course of action, but also being willing to try out others. In the second part of the study, the researchers then used a similar experiment to stimulate the brains of 64 new test subjects who, although they did not have a formal diagnosis of obsessive-compulsive disorder, showed clear symptoms. Again, the custom brainwave manipulation proved most helpful. Subjects with a particularly large number of symptoms seemed to benefit most.

 The  researchers hope that their results can also be applied to other obsessive-compulsive disorders, such as eating disorders, gambling addiction and other addictive diseases. Scientists like Carolyn Rodriguez at Stanford University, who are also researching treatment options for obsessive-compulsive disorder, argue that the method must also work well on formally diagnosed patients. In addition, it must also show that it can keep up with other non-invasive methods such as transcranial magnetic stimulation.

(vsz)

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