Prefrontal Cortex Control Override describes the temporary or chronic failure of the brain’s executive control center, the prefrontal cortex (PFC), to successfully inhibit powerful, immediate urges for hedonic rewards, particularly in the context of highly palatable food consumption. This override signifies a functional imbalance where the impulsive, limbic system drives circumvent the PFC’s role in planning, delayed gratification, and adherence to long-term goals. It is a core neurobiological component of loss-of-control eating.
Origin
This concept is rooted in cognitive neuroscience and the dual-system model of behavior, which posits that actions are governed by both reflective (PFC-mediated) and impulsive (limbic-mediated) systems. The ‘prefrontal cortex’ is the seat of executive function. ‘Control override’ describes the pathological state where the impulsive system gains dominance, often due to chronic stress, fatigue, or the hyper-stimulation of reward pathways.
Mechanism
The mechanism involves a reduction in the functional connectivity or metabolic activity of the prefrontal cortex, which normally provides inhibitory top-down signaling to the reward centers like the nucleus accumbens. Chronic stress and sleep deprivation can impair PFC function, reducing its capacity for inhibitory control. Simultaneously, the powerful dopamine surge triggered by hyper-palatable food can create an exceptionally strong bottom-up signal from the limbic system, effectively overwhelming the weakened PFC control. This neural imbalance leads to the impulsive consumption of food despite the conscious knowledge of its negative long-term consequences.
We use cookies to personalize content and marketing, and to analyze our traffic. This helps us maintain the quality of our free resources. manage your preferences below.
Detailed Cookie Preferences
This helps support our free resources through personalized marketing efforts and promotions.
Analytics cookies help us understand how visitors interact with our website, improving user experience and website performance.
Personalization cookies enable us to customize the content and features of our site based on your interactions, offering a more tailored experience.