Deleting a gene called PTEN in certain brain cells disrupts the brain’s fear circuitry and triggers anxiety-like behavior in ...

Snakes, often perceived as emotionless, do experience a limited range of feelings like fear, stress, and comfort. While they ...

This small, almond-shaped area of your brain is part of the limbic system, the neural network that is responsible for emotional processing. The amygdala is one of the most primitive brain structures.

The reptilian brain controls the regulatory systems in your body like hormones, body temperature, blood pressure, and even hunger. The limbic system is the emotional function of your brain, making ...

While the reptilian brain is sometimes thought of as uncomplex and a relic from an older time, it is quite the opposite. It oversees our vital functions via the autonomic nervous system, after all.

He wrote: “Deep inside the skull of every one of us there is something like a brain of a crocodile. Surrounding the R-complex is the limbic system or mammalian brain, which evolved tens of millions of ...

MacLean's idea was that our brain has evolved layer by layer. The reptilian brain was considered to be the innermost and oldest part. This primitive brain was responsible for instincts like hunger, ...

When early mammals evolved, they added a limbic system for the regulation of emotions above the basal ganglia. And when humans and other advanced mammals arose, according to MacLean, they added a ...