Problems with associative memory is common in diseases where degeneration of brain tissue occurs. It is also known that proper theta-band brain wave oscillations within the neural networks of the brain associated with associative memory performance is key to successfully encoding memory.
In a recent publication, researchers from the Hotchkiss Brain Institute tested whether high definition transcranial alternating current stimulation (HD-TACS)—delivering current at theta-band frequencies—can be used to entrain and boost the power of the natural theta-band brain rhythms; consequently improving associative memory.
In a single blind, between group, randomized, and sham controlled study, 6 Hz HD-TACS, anodal HD-TDCS, and sham were performed on 60 healthy adults. A visual associative memory task was designed to objectively quantify the associative memory performance in subjects. Results showed subjects applied with HD-TACS responded positively in the visual associative memory task, while those applied with HD-TDCS had no effect. TACS also seemed to reduce forgetfulness and false memories.
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