Naslov
Brain activity in response to pictures of food – a MEG study

Autori
Stingl, Krunoslav ; Rogic, Maja ; Porubska, Katarina ; Canova Carlos ; Tschritter, Otto ; Fritsche, Andreas ; Braun Christoph, Birbaumer, Niels ; Häring, Hans Ulrich ; Preissl Hubert

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Special Issue: Society for Psychophysiological Research Abstracts for the Forty-Ninth Annual Meeting Berliner Congress Center, Berlin, Germany October 21-24, 2009 ; Psychophysiology, 2009:Vol 46, Issue Supplement s1, Pages s1- s173, / Society for Psychophysiological Research - : John Wiley & Sons, 2009, 148-148

Skup
Society for Psychophysiological Research Abstracts for the Forty-Ninth Annual Meeting Berliner Congress Center

Mjesto i datum
Berlin, Njemačka, 21.10.2009. - 24.10.2009

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Brain activity ; food ; MEG

Sažetak
Although it is clear that obesity is caused by an imbalance between consumption of calories and basal metabolism or muscular effort, themechanisms in the central nervous system leading to this imbalance are not well understood. To understand these mechanisms one possible starting point is to explore the response of the central nervous system to food stimuli when this balance is still in function. In our study, we examined the neural processes related to visual food and non-food stimuli which were matched for visual complexity in a one-back working memory task with whole head magnetoencephalography (MEG) in normal weight subjects. Compared with non-food stimuli, food stimuli elicited significant differences as early as 120 ms after stimulus onset, localized in early visual areas. This effect was not influenced by the previous picture. In contrast to this result, behavioral measures (reaction time and correctness of responses) were modulated by previous stimuli. A similar effect was also observed for a later component of the evoked magnetic field, around 350 ms post stimulus, with a statistically significant increase in temporal cortex activity when the previous stimulus was food related. In conclusion, this dissociation of category specific effects (early component), and the behavioral modulation of the late component, can be among the starting points to further investigate food related brain processes, especially in obese subjects and subjects with eating disorders.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne medicinske znanosti

Napomena
Psychophysiology 2009 ; Vol 46, Issue s1, Poster 124, S148

POVEZANOST RADA