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@ARTICLE{Wallroth:850300,
author = {Wallroth, R. and Höchenberger, Richard and Ohla, Kathrin},
title = {{D}elta activity encodes taste information in the human
brain},
journal = {NeuroImage},
volume = {181},
issn = {1053-8119},
address = {Orlando, Fla.},
publisher = {Academic Press},
reportid = {FZJ-2018-04342},
pages = {471 - 479},
year = {2018},
abstract = {The categorization of food via sensing nutrients or toxins
is crucial to the survival of any organism. On ingestion,
rapid responses within the gustatory system are required to
identify the oral stimulus to guide immediate behavior
(swallowing or expulsion). The way in which the human brain
accomplishes this task has so far remained unclear. Using
multivariate analysis of 64-channel scalp EEG recordings
obtained from 16 volunteers during tasting salty, sweet,
sour, or bitter solutions, we found that activity in the
delta-frequency range (1–4 Hz; delta power and phase)
has information about taste identity in the human brain,
with discriminable response patterns at the single-trial
level within 130 ms of tasting. Importantly, the latencies
of these response patterns predicted the point in time at
which participants indicated detection of a taste by
pressing a button. Furthermore, taste pattern discrimination
was independent of motor-related activation and encoded
taste identity rather than other taste features such as
intensity and valence. On comparison with our previous
findings from a delayed taste-discrimination task (Crouzet
et al., 2015), taste-specific neural representations emerged
earlier during this speeded taste-detection task, suggesting
a goal-dependent flexibility in gustatory response coding.
Together, these findings provide the first evidence of a
role of delta activity in taste-information coding in
humans. Crucially, these neuronal response patterns can be
linked to the speed of simple gustatory perceptual decisions
– a vital performance index of nutrient sensing.},
cin = {INM-3},
ddc = {610},
cid = {I:(DE-Juel1)INM-3-20090406},
pnm = {572 - (Dys-)function and Plasticity (POF3-572)},
pid = {G:(DE-HGF)POF3-572},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30016677},
UT = {WOS:000445165600041},
doi = {10.1016/j.neuroimage.2018.07.034},
url = {https://juser.fz-juelich.de/record/850300},
}