Neuroscience
Understanding the organ that makes every thought, memory, movement, and emotion possible.
Understanding the brain
Eighty-six billion cells, in constant conversation.
The brain is not a single machine but a living network, some eighty-six billion neurons, each reaching out to thousands of others across tiny gaps called synapses. Thought, memory, movement and feeling all emerge from the timing of their signals.
Nothing about a person is untouched by it. A first word, a remembered face, the balance to cross a room, the ache of loss, all of it written in the same electrical language, firing many times a second, for a lifetime.
The brain in motion
A thought is a signal in motion.
Why it matters
The brain is not measured in scans. It is measured in the life it makes possible, a memory kept, a skill learned, a person known.
Conditions across neuroscience
The many ways a signal can falter.
Migraine
Far more than a headache, a neurological storm that can take hours, or days, from a life.
Multiple Sclerosis
When the immune system turns on the nerves’ own insulation, and messages begin to falter.
Parkinson’s Disease
A slow loss of the cells that make movement smooth, reshaping how a body answers the mind.
Alzheimer’s Disease
The gradual unmaking of memory, and one of the defining challenges of a longer-living world.
Epilepsy
When the brain’s electrical rhythm misfires, and briefly the ordinary world goes still.
Peripheral Neuropathy
Damage to the body’s outer wiring, numbness, pain or weakness far from the brain itself.
Stroke Recovery
After blood to the brain is interrupted, the long and remarkable work of relearning.
Sleep Disorders
When rest, the brain’s nightly act of repair and consolidation, no longer comes as it should.
Understanding the biology
Eight ideas at the heart of it.
The vocabulary of neuroscience, the concepts that explain how the brain works, and how it can go astray.
Neurons
The brain’s messengers, cells built to carry electrical signals across remarkable distances.
Synapses
The tiny gaps where one cell speaks to the next, and where learning physically takes shape.
Neuroplasticity
The brain’s lifelong capacity to rewire itself, to recover, adapt, and learn something new.
Myelin
The insulation sheathing each nerve, letting signals travel fast and clean. Lose it, and messages slow.
Neurotransmitters
The chemical vocabulary of the mind (dopamine, serotonin and more) shaping mood, focus and movement.
Brain Energy
Two percent of the body’s weight, a fifth of its fuel. The brain never truly rests.
Neuroinflammation
The nervous system’s own immune response, protective in balance, harmful when it lingers.
Blood–Brain Barrier
The living wall that guards the brain, and the central puzzle of getting medicine safely across it.
The future of neuroscience
We are learning to read the living brain.
For most of history the brain could only be studied after a life had ended. That is changing. Neuroimaging lets us watch thought as it happens; biomarkers reveal disease years before symptoms; and precision medicine is beginning to tailor care to a single nervous system. Regenerative and gene therapies aim to repair what was once permanent, and artificial intelligence is helping decode patterns too vast for any one mind to hold.
Research topics
Where the science is moving.
Insights library
Reading, for the curious.
How a memory is made, and kept
Every recollection is a network rebuilt. How the brain records a moment, and why some last a lifetime while others fade.
What the brain does while you sleep
Far from switching off, the sleeping brain clears waste, consolidates memory, and quietly prepares for the day ahead.
Migraine is not just a headache
A closer look at one of the most common, and most misunderstood, neurological conditions in the world.
The brain that rewires itself
Learning, recovery, even reinvention: how the adult brain keeps reshaping its own structure, long after we’re grown.
Keeping the mind sharp for longer
What the latest science says about memory, cognition, and the everyday habits that help a brain age well.
The curious brain
Why wonder may be one of the brain’s most powerful states, and what it does to how we learn and remember.
Where Arc fits
The nervous system is the most intricate territory in medicine, and the least forgiving of shortcuts. Long before Arc pursues a single innovation, it commits to understanding this biology on its own terms, because the most human progress in neuroscience will begin with the deepest respect for how the brain already works.