VII Some Aspects of Auditory Evoked Potentials in Man

Auditory-Evoked Far Fields Averaged From the Scalp of Humans

“…Furthermore, the latency of wave I is so short that there is insufficient time for any reflex activity to be generated; e.g. insufficient time for action potentials to leave the skull and energize any muscular component (Bickford, Jacobson and Cody, 1964;Borsanyi, 1964;Cody et al, 1964;Davis et al, 1964;Yoshie and Okudaira, 1969). A muscular origin of the waves reported here is unlikely also because of the absence of the response on the neck (Jewett et al, 1970), the absence of neck tension in the recumbent (sometimes sleeping) subject, and the small amount of myogenic component which is detected at the vertex (Yoshie and Okudaira, 1969;Vaughan and Ritter, 1970).…”

Within Average Variability of the Acoustically Evoked Response

“…multiple, diffuse, delayed, and a non-specific response to external stimulation. Often a fast wave of frequencies [8][9][10][11][12][13][14][15][16] cps are superimposed on a series of slow waves but either may occur independently.…”