What is a Critical Period in Brain Development?

Our brains are continually evolving themselves to meet the everyday life’s needs, even throughout adulthood. However, there are most aspects of brain structure and functions are developed in early childhood. For example, studies have shown that there are certain windows of time during which the young are especially sensitive to their environment. Babies require normal visual input or they may suffer permanent impairment; language skills depend critically on verbal input in the first few years. The critical period for language-learning begins around five years of age and ends around puberty. This is why individuals who learn a new language after puberty almost always speak it with a foreign accent.Therefore, it is very important to learn languages as early as possible.