TY  - JOUR
A1  - Erlbeck, Helena
A1  - Kübler, Andrea
A1  - Kotchoubey, Boris
A1  - Veser, Sandra
T1  - Task instructions modulate the attentional mode affecting the auditory MMN and the semantic N400
JF  - Frontiers in Human Neuroscience
N2  - Event-related potentials (ERPs) have been proven to be a useful tool to complement clinical assessment and to detect residual cognitive functions in patients with disorders of consciousness. These ERPs are of ten recorded using passive or unspecific instructions. Patient data obtained this way are then compared to data from healthy participants, which are usually recorded using active instructions. The present study investigates the effect of attentive modulations and particularly the effect of activevs. passive instruction on the ERP components mismatch negativity (MMN) and N400. A sample of 18 healthy participants listened to three auditory paradigms: anoddball, aword priming, and a sentence paradigm. Each paradigm was presented three times with different instructions: ignoring auditory stimuli, passive listening, and focused attention on the auditory stimuli. After each task, the participants indicated their subjective effort. The N400 decreased from the focused task to the passive task, and was extinct in the ignore task. The MMN exhibited higher amplitudes in the focused and passive task compared to the ignore task. The data indicate an effect of attention on the supratemporal component of the MMN. Subjective effort was equally high in the passive and focused tasks but reduced in the ignore task. We conclude that passive listening during EEG recording is stressful and attenuates ERPs, which renders the interpretation of the results obtained in such conditions difficult.
KW  - ERP
KW  - priming
KW  - selective attention
KW  - event-related potentials
KW  - vigilance decrement
KW  - brain potentials
KW  - vegetative state
KW  - consciousness
KW  - component
KW  - predicts recovery
KW  - mismatch negativity
KW  - attention
KW  - instruction
KW  - N400
KW  - MMN
Y1  - 2014
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-115553
VL  - 8
IS  - 654
ER  - 
TY  - JOUR
A1  - Meule, Adrian
A1  - Kübler, Andrea
A1  - Blechert, Jens
T1  - Time course of electrocortical food-cue responses during cognitive regulation of craving
JF  - Frontiers in Psychology
N2  - In our current obesogenic environment, exposure to visual food-cues can easily lead to craving and overeating because short-term, pleasurable effects of food intake dominate over the anticipated long-term adverse effects such as weight gain and associated health problems. Here we contrasted these two conditions during food-cue presentation while acquiring event-related potentials (ERPs) and subjective craving ratings. Female participants (n = 25) were presented with either high-calorie (HC) or low-calorie (LC) food images under instructions to imagine either immediate (NOW) or long-term effects (LATER) of consumption. On subjective ratings for HC foods, the LATER perspective reduced cravings as compared to the NOW perspective. For LC foods, by contrast, craving increased under the LATER perspective. Early ERPs (occipital N1, 150-200 ms) were sensitive to food type but not to perspective. Late ERPs (late positive potential, LPP, 350-550 ms) were larger in the HC-LATER condition than in all other conditions, possibly indicating that a cognitive focus on negative long-term consequences induced negative arousal. This enhancement for HC-LATER attenuated to the level of the LC conditions during the later slow wave (550-3000 ms), but amplitude in the HC-NOW condition was larger than in all other conditions, possibly due to a delayed appetitive response. Across all conditions, LPP amplitudes were positively correlated with self-reported emotional eating. In sum, results reveal that regulation effects are secondary to an early attentional analysis of food type and dynamically evolve over time. Adopting a long-term perspective on eating might promote a healthier food choice across a range of food types.
KW  - EEG
KW  - disorder examination questionnaire
KW  - eating disorder
KW  - emotion regulation
KW  - future directions
KW  - attention
KW  - brain
KW  - high-calorie
KW  - german version
KW  - bulimia nervosa
KW  - chocolate images
KW  - event-related potentials
KW  - eating
KW  - calorie content
KW  - food-cues
KW  - food craving
KW  - LPP
KW  - slow wave
Y1  - 2013
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-122566
SN  - 1664-1078
VL  - 4
IS  - 669
ER  -