The Human Brain
The human brain is the central organ of the nervous system, an extraordinarily complex structure responsible for thought, memory, emotion, and control of the body, containing an estimated 86 billion neurons.
The brain is divided into several major regions, including the cerebrum, responsible for higher-level thinking and voluntary movement, the cerebellum, which coordinates movement and balance, and the brainstem, which controls essential functions like breathing and heart rate.
Modern neuroscience has been transformed by imaging technologies such as MRI and fMRI, which allow researchers to observe brain activity in real time, greatly expanding understanding of how different regions contribute to behavior and cognition.
Despite enormous scientific progress, much about the brain remains poorly understood, including the precise mechanisms underlying consciousness, memory formation, and complex neurological and psychiatric conditions.