[azhu]

> How curious to know that it's all in the brain rather than a psychological cause such as anxiety

I'm not sure this model of thinking is fully correct. In a way, it's like saying that muscle cramps are all in the muscle rather than in their lack of hydration or their being overworked.

The substance of thought, emotion, and cognition is synapses firing, neurotransmitters transmitting, and neural connections being made. Like muscles, their movements flow as a result of environmental inputs, and environmental inputs that are stronger create stronger adaptations towards them.

The article doesn't say that it's all in the brain.

[matthewheath]

Yes, that's true. Clumsy wording on my part, sorry.