The words “brain bank” may evoke scenes from a sci-fi movie or images of brains floating in jars on laboratory shelves. The reality, however, is far less dramatic and far more important. So what exactly are brain banks, and why are they crucial for scientists studying brain diseases like Alzheimer’s?
What is a brain bank?
A brain bank is a repository that collects and stores donated brain tissue for scientific research. Each brain donated to the bank undergoes a detailed examination to create a record of its condition. If the donor suffered from a brain disease, this record includes an accurate diagnosis and information on the disease stage and associated brain changes. Brains from healthy donors are also thoroughly examined and used as controls for comparison with diseased brains.
Once preserved, catalogued, and carefully stored, the brain tissue is available for scientific research. One brain provides tissue for dozens, if not hundreds, of studies.
Why is brain tissue important?
Human brain tissue is the gold standard for understanding a disease as it occurs in people. While lab models are useful for testing hypotheses and understanding the basics of how a disease works, they cannot fully replicate the complexity of the human brain.
When someone dies with a brain disorder, their brain tissue contains the hallmarks of that disease, such as plaques and tangles, and reflects years or even decades of disease progression. This gives scientists a precious window into what’s happening at the molecular, cellular, and structural levels. Brain tissue also carries the imprint of that person’s entire life—their genetics, aging process, environmental exposures, and lifestyle. This is important because diseases don’t happen in a vacuum, and a person’s lived experience often influences disease risk. Understanding how these factors interact in real tissue helps scientists piece together why some people get sick and others don’t.
Unlike skin or blood, a living person’s brain can’t be readily biopsied for research. Brain tissue is almost exclusively available only after death. This scarcity is why brain banks and the donors who contribute to them are so essential.
What you should know about brain donation
There are a few misconceptions about brain donation that are worth clearing up. Maybe you think you’ve already agreed to donate your brain by checking the organ donor box on your driver’s license—but that isn’t the case. Driver’s license organ donation is for saving lives through transplantation. Brain donation is used solely to advance scientific research and requires a separate decision and advanced planning.
Brain donation won’t affect your funeral plans. You can still have an open casket service if you choose. And depending on where you live, it may not cost anything. The Brain Donor Project, which partners with the National Institutes of Health NeuroBioBank, connects donors with participating brain banks at no cost, making the process straightforward and accessible. If the Brain Donor Project doesn’t have a brain bank in your area, local universities or brain banks may be able to help. A list of all brain banks and their locations is available here.
If you are considering becoming a brain donor, explore your options and make arrangements ahead of time. The Brain Donor Project or the Brain Support Network are good places to start. Preregistering with a brain bank and sharing your plans with your loved ones ensures that, when the time comes, your wish is honored.
Every brain donated—whether from someone who lived with a disease or someone who didn’t—is a generous gift that brings scientists closer to understanding diseases like Alzheimer’s. Brain banks transform a person’s donation into the possibility of discovery.
Although brain banks sound like science fiction, the research they make possible is very real.
