Evoked fields are part of the magnetoencephalogram. They are brain signals evoked by sensory stimulation, but usually buried by the ongoing brain activity. Repeating the stimulus multiple times and averaging the signals reduces the uncorrelated ongoing activity and reveals the evoked field.
Evoked fields are the magnetoencephalographic equivalent to evoked potentials, which are part of the electroencephalogram.
Famous quotes containing the words evoked and/or field:
“The brotherhood of man is evoked by particular men according to their circumstances. But it seldom extends to all men. In the name of our freedom and our brotherhood we are prepared to blow up the other half of mankind and to be blown up in our turn.”
—R.D. (Ronald Davi)
“They talk about a woman’s sphere,
As though it had a limit.
There’s not a place in earth or heaven.
There’s not a task to mankind given ...
Without a woman in it.”
—Kate Field (1838–1896)