Just why is it that our feelings and behaviours sometimes seem so out of control? The answer lies with our extraordinary brain. It is designed to solve problems and, together with our nervous system, assesses threat and ensures our survival. Usually our brain goes about its business so automatically that we hardly notice what it’s up to. It’s not until it is under stress that we realise how much is going on in our brain and how unhelpful all that activity can sometimes be. Let’s look at our prefrontal cortex for a minute.
Only humans have a fully developed prefrontal cortex. It is the area of the brain responsible for higher-level thinking. It helps us to set goals, problem-solve, focus our attention and control our impulses (although this is less true for chocolate!).
When we’re stressed, our body releases stress hormones like adrenaline and cortisol. Interestingly, these stress hormones suppress the brain activity in the prefrontal cortex so that we literally cannot think (this explains overdoing the chocolate). This may sound like a silly thing for our body to do, but it is very clever (and gives you an excuse for all the chocolate).