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In the first post, I explained that all voluntary actions are driven by a central action selection system in the mesolimbic area (the reward system).  This is the part of you that makes the decision to act, or not to act.  This system determines your overall motivation to obtain food, based on a variety of internal and external factors, for example hunger, the effort required to obtain food, and the sensory qualities of food/drink.  These factors are recognized and processed by a number of specialized 'modules' in the brain, and forwarded to the reward system where the decision to eat, or not to eat, is made.  Researchers divide food intake into two categories: 1) eating from a true energy need by the body (homeostatic eating), e.g. hunger, and 2) eating for other reasons (non-homeostatic eating), e.g. eating for social reasons or because the food tastes really good. In the second post of the series, we explored how the brain regulates food intake on a meal-to meal basis based ...

In the last post, I explained that eating behavior is determined by a variety of factors, including hunger and a number of others that I'll gradually explore as we make our way through the series.  These factors are recognized by specialized brain 'modules' and forwarded to a central action selection system in the mesolimbic area (the reward system), which determines if they are collectively sufficient cause for action.  If so, they're forwarded to brain systems that directly drive the physical movements involved in seeking and consuming food (motor systems). The term 'homeostasis' is important in biology.  Homeostasis is a process that attempts to keep a particular factor within a certain stable range.  The thermostat in your house is an example of a homeostatic system.  It reacts to upward or downward changes in a manner that keeps temperature in a comfortable range.  The human body also contains a thermostat that keeps internal temperature close to 98.6 F.  M...

As with all voluntary movements, eating food is an expression of activity in the brain.  The brain integrates various inputs from around the body, and outside the body, and decides whether or not to execute the goal-directed behaviors of food seeking and consumption.  Research has uncovered a lot about how this process works, and in this series I'll give a simplified overview of what scientists have learned about how, and why, the brain decides to eat. The Gatekeeper of Voluntary Behaviors Read more »

The nature of the Internet is that comments sections are rowdy places.  But ultimately I do have control over my corner of the world, and I intend to exert it to maintain a higher level of information quality and decorum.  Here are my criteria for deciding whether or not a comment will be published: Value .  Comments should be well thought out, and points supported by research or at least solid logic.  Personal anecdotes are welcome as long as they aren't over-interpreted.  Thoughtful questions are also welcome, although I can't guarantee I'll answer them.  As always, anyone is free to disagree with me in a constructive manner, or simply offer a word of support.   Respect .  Comments should be respectful to me and other commenters, and composed in a concise manner.  It isn't difficult to disagree in a respectful way. On topic .  Comments should be at least somewhat relevant to the subject of the post. Full name .  Attaching your ful...

I often receive requests from people asking for my overall perspective on fat loss and health.  I share my opinions here, but they're scattered throughout hundreds of posts, there's a lot I haven't had a chance to write about, and I rarely give practical recommendations.  However, I knew I'd eventually put everything together into a cohesive fat loss program-- it was only a matter of finding the right opportunity. That opportunity presented itself in 2011 when I met Dan Pardi, a researcher whose work focuses on sleep and food intake, and the CEO of a company called Dan's Plan .  I was immediately impressed by Dan because he stood out as someone with a high level of expertise in sleep and physical activity, as well as someone who has successfully lost a substantial amount of fat and kept it off for several years. Dan and his team had developed a set of unique and engaging tools for tracking weight, sleep, and physical activity to help people maintain daily mindfulnes...