Categories
books notes philosophy wellness

7½ Lessons for the Brain, Barrett (2020)

Study notes for this short, pithy book about the brain, our relationship with it, and the nature of reality.


½ Your Brain is Not for Thinking

Your brain’s most important job is not thinking; it is to control your body – to manage allostasis – ie. predicting and preparing to meet the body’s energy needs (prediction beats reaction in nature) before they arise, so you can efficiently make worthwhile movements and survive. Your brain is the command center that supervises, regulates, and protects the systems and subsystems that comprise your entire body.

1. You Have One Brain (not Three)

Paul MacLean’s three-layered brain – neocortex (rational), limbic (emotional), lizard (survival) – is a modern myth that persists in popular culture because of its accessibility and our ego; the conflict between the rational and the emotional is based on this belief. However, this is not borne out by science – the rational/emotional dichotomy is a false one – there is only one brain, and its rational behavior consists of making a good body-budgeting investment in a given situation.

2. Your Brain is a Network

A network (a tree-like structure of neurons, synapses, dendrites, axons, etc.) is the best scientific description of a brain today – a physical structure that is capable of reconfiguring itself (often very quickly) to integrate vast amounts of information efficiently. The brain is considered a complex system, able to configure itself into an enormous number of distinct neural patterns. It is capable of degeneracy – almost like redundancy, instead of the same set of neurons being responsible for a certain action, different sets of neurons are capable of this task. Complex brains remember more, are more creative and adaptable, and are also more resilient to injury. Note that other species on Earth also have brains with high complexity.

Categories
books notes social wellness

Mistakes Were Made, Tavris, Aronson, 3rd ed. (2020)

Study notes for a favorite read this year, a book on cognitive dissonance theory (the rest of the title: But Not By Me) – something all of us will recognize once explained; applications to past and recent history (mostly omitted below); and more rewarding strategies. We live in a world that often seems chaotic and unordered, particularly when it comes to living and dealing with others; an insight like this helps us see order in the chaos, makes it appear less random, and empowers us to contemplate change.


Cognitive Dissonance

There are two kinds of lies, one conscious, where the liar sees the lie for what it is, a deliberate distortion of truth; and the other, made noble through self-justification, so that the lie ceases to become one. The second kind is the result of cognitive dissonance: when someone holds two contradictory views – usually a self-concept, such as “I am a sensible, competent person”, vs a piece of new information, such as “I just spent a lot of time on something worthless and silly”. Because it hurts so much to change our view of ourselves, we resort to ego-preservation, and change the other view instead, and suddenly, the worthless and silly thing rises in our estimation – we justify it by distorting it in some way – actually, it was meaningful to me and I’m glad I did it. Dissonance theory predicts that we ask ourselves: is the new information consonant with my belief?

Categories
books notes wellness

The Obesity Code (2016), Jason Fung

I read this at the end of 2018, and it galvanized me on a path of personal change and continual learning about health and wellness. That space has exploded in recent years, especially in the age of podcasts and social media we’re in, and there’s been more research since, but this book was my trailblazer, and what follows are some notes – by a non-physician and neophyte to the material, so keep that caveat in mind – I made for myself back then.

Just educating myself a little more about how our bodies – the most important thing we have – function, felt empowering, and it was also surprising, given what I thought I knew already. I still find it somewhat shocking that fasting, something that barely crosses our minds, so simple as to be banal, can be so transformative. The Diabetes Code, by the same author, is similarly excellent.


Obesity as an epidemic is recent, only materializing in the last generation. It began in the 1950’s, as a function of increased life expectancy: the average age of the first heart attack is 66 years, and more people were reaching this age. Cholesterol was thought to cause heart disease, and dietary fat was thought to increase cholesterol, so physicians advocated lower-fat diets, which in turn increased carbohydrate intake. In 1977, a government committee (not a committee of physicians) introduced the Food Pyramid, advocating less fat and more carbohydrates, and the rates of obesity started increasing from that very year. Because refined carbohydrates couldn’t be both good (low in fat) and bad (fattening), it was decided that they weren’t fattening, and instead, excess calories were to blame.