Before we dive into how the brain works, we need to know how it’s built. In this episode, we open the Illustrated Guide to the Brain — your map to the physical landscape of the nervous system.

We’ll explore the brain not just as a concept, but as a real, three-dimensional structure with surfaces, sections, and systems that all fit together inside the skull. From the folds of the cerebral cortex to the deep cores of the brainstem and spinal cord, this guided tour will show how anatomy lays the groundwork for everything the nervous system does.

You’ll learn how neuroscientists divide the brain into functional systems — like the visual, olfactory, and auditory networks — and how these systems connect into one coordinated whole. We’ll also touch on the cranial nerves, the autonomic nervous system, and the blood vessels that keep the brain alive and working.

Think of this as a traveler’s guide to the brain’s terrain — a way to learn the names and landmarks before we start exploring their functions in depth.