Asymmetric Brain Activation and its Relationship with Overeating
Insight Into the Brain s Control of Hunger and Eating
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Dietary intake is heavily influenced by affect, which has been related to asymmetrical activation in the prefrontal cortex (prefrontal asymmetry). In normal weight individuals, dietary restraint has been related to prefrontal asymmetry. However, this relationship was not mediated by affect, suggesting an independent relationship between prefrontal asymmetry and eating behavior. This study tested the hypotheses that, in an obese sample, several markers of overeating would be related to prefrontal asymmetry independent of affect. EEG recordings, and measures of overeating and affect, were collec...
Dietary intake is heavily influenced by affect,
which has been related to asymmetrical activation in
the prefrontal cortex (prefrontal asymmetry). In
normal weight individuals, dietary restraint has
been related to prefrontal asymmetry. However, this
relationship was not mediated by affect, suggesting
an independent relationship between prefrontal
asymmetry and eating behavior. This study tested the
hypotheses that, in an obese sample, several markers
of overeating would be related to prefrontal
asymmetry independent of affect. EEG recordings, and
measures of overeating and affect, were collected in
obese adults. 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-
sided prefrontal asymmetry independent of affect.
Findings in this study further implicate the
prefrontal cortex in the cognitive control of
dietary intake. Models of human affect, overeating,
prefrontal asymmetry, and how they may be related
are discussed at length.
which has been related to asymmetrical activation in
the prefrontal cortex (prefrontal asymmetry). In
normal weight individuals, dietary restraint has
been related to prefrontal asymmetry. However, this
relationship was not mediated by affect, suggesting
an independent relationship between prefrontal
asymmetry and eating behavior. This study tested the
hypotheses that, in an obese sample, several markers
of overeating would be related to prefrontal
asymmetry independent of affect. EEG recordings, and
measures of overeating and affect, were collected in
obese adults. 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-
sided prefrontal asymmetry independent of affect.
Findings in this study further implicate the
prefrontal cortex in the cognitive control of
dietary intake. Models of human affect, overeating,
prefrontal asymmetry, and how they may be related
are discussed at length.
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