Abstract：
:Although there have been suggestions that altered cognitive control and food reward sensitivity contribute to overeating in obese individuals, neurophysiological correlates of these mechanisms have been poorly investigated. The current study investigated event-related potentials (ERP) in 24 severely obese and 26 normal weight individuals in fasting condition, using a novel Simon task with food and object distractors. The study showed that conflict in the Simon task for the food distractor increased with hunger in both groups but was larger with respect to a neutral condition only in the obese individuals. ERP showed higher N1amplitudes in both groups for food distractor, reflecting early food processing. The P2 latency was delayed and the effect of distractors on N2 amplitude was smaller in the obese subjects, reflecting altered neural mechanisms associated with selective attention and cognitive control, all contributing hypothetically to delay response selection of these individuals faced with food distractor.
journal_name
Biol Psycholjournal_title
Biological psychologyauthors
Testa G,Buongiorno F,Rusconi ML,Mapelli D,Vettor R,Angeli P,Amodio P,Schiff Sdoi
10.1016/j.biopsycho.2019.107804subject
Has Abstractpub_date
2020-01-01 00:00:00pages
107804eissn
0301-0511issn
1873-6246pii
S0301-0511(18)30099-1journal_volume
149pub_type
杂志文章abstract：:In the auditory system, cortical event-related potential amplitudes are enhanced during selective attention within the auditory channel. In the case of brainstem responses, however, the results are less clear since only a few studies have reported attention effects. Nearly all of these studies have used click stimuli ...
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