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Re: N1 enhancement for Cue-Probe Pairs
are you interested in the N1 component of the peripheral compound action
potential, or in the N100 component of the EEG/MEG?
In either case, I reviewed studies examining the effects of a forward
masker on physiological responses to a target tone in my doctoral
dissertation concerned with loudness enhancement and intensity
resolution under non-simultaneous masking
(http://nbn-resolving.de/urn:nbn:de:kobv:83-opus-10616) . You will find
the discussion of these studies on pp. 56ff (Chapter 4.2.2).
There is no evidence for enhancement at early processing stages (CAP,
auditory brainstem response). For the N100 (EEG) or N100m (MEG), several
authors reported an enhancement of the response to the second tone in a
pair of two tones at ISIs smaller than 300 ms. However, in all of these
studies, the first tone (masker/cue tone) and the second tone
(target/probe) were presented at the same intensity. Therefore, this
physiological enhancement is not reflecting loudness enhancement
[Oberfeld, J. Acoust. Soc. Am. 121, 2137–2148 (2007)]), which occurs
only for maskers/cues higher in level than the target.
Date: Thu, 6 Dec 2007 17:14:29 -0000
From: Katrin Krumbholz <katrin@xxxxxxxxxxxxx>
Subject: N1 enhancement for Cue-Probe Pairs
I am looking for references on the enhancement that has been observed in
some studies of the N1 response to a Probe tone following a Cue tone in a
C-T paradigm. I remember reading about it in a review article, but I cannot
remember which one it was or what the original data was. I seem to remember
that enhancement (as opposed to suppression) occurs for small Cue-Probe
intervals (300-500 ms). Can anybody point me to the appropriate references?
Many thanks in advance!
Best wishes, Katrin
Dr. Daniel Oberfeld-Twistel
Johannes Gutenberg - Universitaet Mainz
Department of Psychology
Phone ++49 (0) 6131 39 22423
Fax ++49 (0) 6131 39 22480