Magnetic brain oscillations and auditory memory

Electromagnetic oscillatory activity in the gamma-band range (GBA, about 30–100Hz) has been proposed as a correlate of cortical network synchronization involved in cognitive processing. Increases in electroencephalographic GBA have been demonstrated during a variety of paradigms including gestalt perception, attention, learning and memory. In magnetoencephalogram topographically focal GBA enhancements have been found in fast frequencies (about 50–90Hz) during both bottom-up and top-down driven processing of auditory information. Studies on passive auditory mismatch processing have shown that the detection of cha…