Have you ever heard the term "lizard brain" used to explain why you might be struggling with focus, organisation, or emotional regulation? It's a popular idea, often found in self-help books and even some psychology resources. The idea suggests that deep inside your brain, there's a primitive "reptilian" part that drives your impulses and makes it difficult to control your behaviour. This concept proposes that the human brain has three layers: the oldest reptilian brain that controls basic functions, the limbic system for emotions, and the cerebral cortex for language and reason. You might hear people say that your "lizard brain" is responsible for your "fight or flight" responses, or for making irrational decisions.