TY - JOUR
T1 - Asymmetric prefrontal cortex activation in relation to markers of overeating in obese humans
AU - Ochner, Christopher N.
AU - Green, Deborah
AU - van Steenburgh, J. Jason
AU - Kounios, John
AU - Lowe, Michael R.
PY - 2009/8
Y1 - 2009/8
N2 - Dietary restraint is heavily influenced by affect, which has been independently related to asymmetrical activation in the prefrontal cortex (prefrontal asymmetry) in electroencephalograph (EEG) studies. In normal weight individuals, dietary restraint has been related to prefrontal asymmetry; however, this relationship was not mediated by affect. This study was designed to test the hypotheses that, in an overweight and obese sample, dietary restraint as well as binge eating, disinhibition, hunger, and appetitive responsivity would be related to prefrontal asymmetry independent of affect at the time of assessment. Resting EEG recordings and self-report measures of overeating and affect were collected in 28 overweight and obese adults. Linear regression analyses were used to predict prefrontal asymmetry from appetitive measures while controlling for affect. Cognitive restraint and binge eating were not associated with prefrontal asymmetry. However, disinhibition, hunger, and appetitive responsivity predicted left-, greater than right-, sided prefrontal cortex activation independent of affect. Findings in this study add to a growing literature implicating the prefrontal cortex in the cognitive control of dietary intake. Further research to specify the precise role of prefrontal asymmetry in the motivation toward, and cessation of, feeding in obese individuals is encouraged.
AB - Dietary restraint is heavily influenced by affect, which has been independently related to asymmetrical activation in the prefrontal cortex (prefrontal asymmetry) in electroencephalograph (EEG) studies. In normal weight individuals, dietary restraint has been related to prefrontal asymmetry; however, this relationship was not mediated by affect. This study was designed to test the hypotheses that, in an overweight and obese sample, dietary restraint as well as binge eating, disinhibition, hunger, and appetitive responsivity would be related to prefrontal asymmetry independent of affect at the time of assessment. Resting EEG recordings and self-report measures of overeating and affect were collected in 28 overweight and obese adults. Linear regression analyses were used to predict prefrontal asymmetry from appetitive measures while controlling for affect. Cognitive restraint and binge eating were not associated with prefrontal asymmetry. However, disinhibition, hunger, and appetitive responsivity predicted left-, greater than right-, sided prefrontal cortex activation independent of affect. Findings in this study add to a growing literature implicating the prefrontal cortex in the cognitive control of dietary intake. Further research to specify the precise role of prefrontal asymmetry in the motivation toward, and cessation of, feeding in obese individuals is encouraged.
KW - Appetitive responsivity
KW - Binge eating
KW - Dietary restraint
KW - Disinhibition
KW - Frontal asymmetry
UR - http://www.scopus.com/inward/record.url?scp=67649854935&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67649854935&partnerID=8YFLogxK
U2 - 10.1016/j.appet.2009.04.220
DO - 10.1016/j.appet.2009.04.220
M3 - Article
C2 - 19426775
AN - SCOPUS:67649854935
SN - 0195-6663
VL - 53
SP - 44
EP - 49
JO - Appetite
JF - Appetite
IS - 1
ER -