The Big Picture

Neuroscience reveals staggering complexity:

• Scale: 86 billion neurons form over 100 trillion connections.
• Regions specialize: the prefrontal cortex handles planning and impulse control.
• White matter integrates: bundled fibers link specialized regions into unified processing.
• Neurochemistry shapes the mind: psychiatric medications work by adjusting neurotransmitters, making brain chemistry one important lens on mental health.