Permanent Sharp Switches in Brain Waves During Spoken Word Recognition

We measured magnetic signals of the human brain during recognition of spoken words and permanently observed clear jumps in the rate of the signal amplitude changes. The curves can be always represented as a concatenation of piecewise linear time segments with abrupt changes of slope. Duration of these time segments is highly variable, though it follows common dependence for all segments of the whole record. The brain signals during execution of a cognitive task resembled relay system switching permanently when performing computations. We intend to reveal links between remote areas in the brain which synchronize moments of abrupt switching.