There are only tiny differences between the brains of humans and apes – but these differences are critical.

Ninety percent of our knowledge of the human brain has been acquired in the last 20 years – and we’re still far from fully understanding it. One thing we do know, though, is that our brains aren’t that different from the brains of our closest mammalian relatives – chimpanzees.

Our brain is divided into three main parts, each with distinctive functions, and two of these parts are similar to the brains of apes.

The first part is known as the reptilian brain. This section regulates the bodily functions we don’t consciously control, like breathing and sweating.

Second is the mammalian brain, which constantly scans our environment for danger or reward. It’s also the emotional hub of our brain, dealing with feelings and memories.

Although we share these parts with apes, the third section is what sets us apart. This is the prefrontal cortex, namely the human brain. The prefrontal cortex is responsible for reason, analysis, and the handling of emotions that stem from other parts of the brain.

Imagine the mammalian brain as a kindergarten: everybody is running amok and doing as they please. When the preschool teacher – the human brain – walks in, the chaos is brought under control and order returns.

We need our mammalian and human brains to get on well with one another, otherwise we would continuously fall victim to our impulses. Say your boss is rude to you and you feel a sudden urge to slap him in the face – this is the knee-jerk emotional reaction of the mammalian brain.

But if you pause for a breath, you’ll realize that slapping your boss wouldn’t just be a step back in your career, but could also result in a lawsuit. So you decide to calm down. This is your prefrontal cortex doing its duty and preventing you from impulsive behavior.