Behavioral and electrophysiological correlates of cognitive control in ex-obese adults

6533b822fe1ef96bd127cd07

RESEARCH PRODUCT

Behavioral and electrophysiological correlates of cognitive control in ex-obese adults

Chiara Pavan Antonino Vallesi Franco Bassetto Vincenzo Vindigni Vincenza Tarantino

subject

Male Inhibition (Psychology)Bariatric surgery; ERP; Inhibition; Obesity; Stroop; Switching Audiology Developmental psychology Task (project management)Cognition Postoperative Complications 0302 clinical medicine Weight loss Postoperative Period Evoked Potentials Inhibition General Neuroscience 05 social sciences Cognitive flexibility Brain Electroencephalography Cognition Middle Aged Inhibition Psychological Neuropsychology and Physiological Psychology Female Stroop Evoked Potential medicine.symptom Case-Control Studie Psychology psychological phenomena and processes ERP Human Adult medicine.medical_specialty Stimulus (physiology)behavioral disciplines and activities 050105 experimental psychology Young Adult 03 medical and health sciences Settore M-PSI/08 - Psicologia Clinica Weight Loss Reaction Time medicine Humans Cognitive Dysfunction 0501 psychology and cognitive sciences Obesity Bariatric surgery Neuroscience (all)Settore M-PSI/02 - Psicobiologia E Psicologia Fisiologica medicine.disease Obesity Weight Lo Electrophysiology Case-Control Studies Stroop Test Switching Postoperative Complication 030217 neurology & neurosurgery Stroop effect

description

Impaired cognitive control functions have been documented in obesity. It remains unclear whether these functions normalize after weight reduction. We compared ex-obese individuals, who successfully underwent substantial weight loss after bariatric surgery, to normal-weight participants on measures of resistance to interference, cognitive flexibility and response inhibition, obtained from the completion of two Stroop tasks, a Switching task and a Go/NoGo task, respectively. To elucidate the underlying brain mechanisms, event-related potentials (ERPs) in the latter two tasks were examined. As compared to controls, patients were more susceptible to the predominant but task-irrelevant stimulus dimension (i.e., they showed a larger verbal Stroop effect), and were slower in responding on trials requiring a task-set change rather than a task-set repetition (i.e., they showed a larger switch cost). The ERP correlates revealed altered anticipatory control mechanisms (switch positivity) and an exaggerated conflict monitoring response (N2). The results suggest that cognitive control is critical even in ex-obese individuals and should be monitored to promote weight loss maintenance.

year	journal	country	edition	language
2017-01-01

10.1016/j.biopsycho.2017.05.012 http://hdl.handle.net/11577/3235073