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Showing posts with label superstimuli. Show all posts
Showing posts with label superstimuli. Show all posts
Friday, April 26, 2013
Friday, March 22, 2013
Sunday, February 3, 2013
Why Do We Eat? A Neurobiological Perspective. Part VI
In previous posts in this series, I explained that the brain (primarily the mesolimbic system) integrates various factors to decide whether or not to drive food seeking and consumption behaviors. These include homeostatic factors such as hunger, and non-homeostatic factors such as palatability and the social environment.
In this post, I'll examine the reward system more closely. This is the system that governs the motivation for food, and behavioral reinforcement (a form of learning). It does this by receiving information from other parts of the brain that it uses to determine if it's appropriate to drive (motivate) food seeking behavior. I covered its role in motivation in the first post of the series, so in this post I'll address reinforcement.
Behavioral Reinforcement
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In this post, I'll examine the reward system more closely. This is the system that governs the motivation for food, and behavioral reinforcement (a form of learning). It does this by receiving information from other parts of the brain that it uses to determine if it's appropriate to drive (motivate) food seeking behavior. I covered its role in motivation in the first post of the series, so in this post I'll address reinforcement.
Behavioral Reinforcement
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Saturday, February 2, 2013
Why Do We Eat? A Neurobiological Perspective. Part V
In previous posts, I explained that food intake is determined by a variety of factors that are detected by the brain, and integrated by circuits in the mesolimbic system to determine the overall motivation to eat. These factors include 'homeostatic factors' that reflect a true energy need by the body, and 'non-homeostatic factors' that are independent of the body's energy needs (e.g. palatability, habit, and the social environment).
In this post, we'll explore the hedonic system, which governs pleasure. This includes the pleasure associated with food, called palatability. The palatability of food is one of the factors that determines food intake.
The Hedonic System
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In this post, we'll explore the hedonic system, which governs pleasure. This includes the pleasure associated with food, called palatability. The palatability of food is one of the factors that determines food intake.
The Hedonic System
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Friday, November 16, 2012
Thursday, August 2, 2012
Two Great Quotes About Obesity (technical)
By Dr. Hans-Rudolf Berthoud, from a recent paper, "The Neurobiology of Food Intake in an Obesogenic Environment" (1). I came across it because it cites my review paper (2). My perspective on obesity is similar to his. From the abstract:
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The modern lifestyle with its drastic changes in the way we eat and move puts pressure on the homoeostatic system responsible for the regulation of body weight, which has led to an increase in overweight and obesity. The power of food cues targeting susceptible emotions and cognitive brain functions, particularly of children and adolescents, is increasingly exploited by modern neuromarketing tools. Increased intake of energy-dense foods high in fat and sugar is not only adding more energy, but may also corrupt neural functions of brain systems involved in nutrient sensing as well as in hedonic, motivational and cognitive processing.And a nice one from the conclusions:
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