A sensitization/habituation effect could also be discerned in the ERP waves. The
amplitude of the first negative deflection was decreased during the second part
of the test in the non-CI group. No such decrease was found in the CI group. This
peak, labelled the N1, has by others been associated with early sensory filtering and
allocation of perceptual resources (Kok, 1997). Moreover, it has been shown that
olfactory (Tateyama, Hummel, Roscher, Post, & Kobal, 1998) and chemosomatosensory
(Frasnelli, Lötsch, & Hummel, 2003) N1 amplitudes increase with greater
stimulus intensities.
A sensitization/habituation effect could also be discerned in the ERP waves. Theamplitude of the first negative deflection was decreased during the second partof the test in the non-CI group. No such decrease was found in the CI group. Thispeak, labelled the N1, has by others been associated with early sensory filtering andallocation of perceptual resources (Kok, 1997). Moreover, it has been shown thatolfactory (Tateyama, Hummel, Roscher, Post, & Kobal, 1998) and chemosomatosensory(Frasnelli, Lötsch, & Hummel, 2003) N1 amplitudes increase with greaterstimulus intensities.
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