Poster B31, Sunday, March 25, 8:00-10:00 am, Exhibit Hall C
Body Mass Correlates Inversely with Inhibitory Control in Go/NoGo Task: an ERP Study
Siqi Chen1, Yajun Jia1, Steven Woltering1, Diana Guerra1, Johanna Song1; 1Texas A&M University
Inhibitory control is defined as the ability to suppress prepotent responses and resist irrelevant stimuli, which is thought to play a critical role in the manifestation and maintenance of obesity in adolescents. Adolescence is a unique developmental stage characterized by significant maturational changes in cortical structures (i.e., prefrontal cortex: PFC) that relate to inhibitory control processes. The current study investigated the behavioral and neurophysiological correlates of inhibitory control in adolescents (18 normal-weight and 24 obese adolescents) using electroencephalography (EEG)-based measures during a Go/NoGo task. We compared the N2 and P3 event-related potential (ERP) components, which are believed to be derived from PFC activity. For task performance, results indicated that obese adolescents showed lower accuracy compared to their normal-weight peers in NoGo trials where greater amounts of inhibitory control effort were required. For the ERP components, a larger NoGo N2 amplitude and smaller NoGo P3 amplitude were observed in obese adolescents compared to normal-weight group. Furthermore, a lower self-efficacy of individual’s ability to control eating behaviors in challenging situations (as measured by the Weight Efficacy Lifestyle-Short Form) directly correlated with larger NoGo N2 amplitudes for both groups. These findings suggested that obesity in adolescence is negatively and selectively associated with prefrontal inhibitory control. The results contribute to the growing literature of obesity in adolescents and increase our understanding of the neural correlates of inhibitory control associated with obesity.
Topic Area: EXECUTIVE PROCESSES: Monitoring & inhibitory control