Spontaneous Synchronization of Oscillations Between Multiple Cortical Sites and Exact Fit of the Wave Crest with the Onset of Word Recognition, Significantly Accelerate Performing of a Cognitive Task
摘要
We measured magnetic signals of the brain during recognition of spoken words. In some cases subjects confirmed recognition very quickly – when only the first third of the word’s sound had been perceived. We paid special attention to these instances. A characteristic feature of these events is that during recognition process multiple cortical sites display a single oscillatory episode, specific to each location. In addition to episodes with rather irregular time course of the magnetic signal, in the comparable number of sites we observed only two waves, which perfectly fit within the time window of the recognition. Moreover, the start of word perception coincides with the initial wave crest, while the crest of the second wave coincides with the keystroke confirming recognition. We propose that synchronization of spontaneous oscillations with the recognition process significantly accelerates its progression.