Can we reconstruct the human mind by growing brain circuits in a lab?
In short: Studying the human brain is notoriously difficult because it is tucked away inside our skulls. To bypass this, scientists are now using stem cells to grow miniature, self-organizing clumps of neural tissue. These lab-grown models allow researchers to watch the complex assembly of human brain circuitry in real time.
For decades, neuroscientists have faced a fundamental paradox: the desire to understand the intricate circuits that produce human mental life, contrasted with the extreme difficulty of studying actual human brain tissue. Most people are unwilling to part with samples of their brain, and the organ's location makes direct observation nearly impossible. To solve this, Sergiu Pasca and his team at Stanford Medicine have pioneered techniques to 'reboot' cells—starting with skin cells from healthy subjects or patients with neuropsychiatric disorders—and guiding them to develop into various types of brain cells. This research is supported by the Wu Tsai Neurosciences Institute. Pasca's team works alongside various specialists, including engineers and bioethicists.
This process utilizes stem cell technology to create 'organoids,' which are floating spheres of cells grown in laboratory dishes. These organoids can represent different brain regions. By combining these specialized organoids, researchers can create even more complex structures called 'assembloids.' These assembloids are simplified human brain circuits that demonstrate the ability to form their own neural connections, allowing scientists to observe the molecular rules that orchestrate brain assembly as it happens. These models are often referred to as 3D in vitro systems. They help reveal how axon guidance is regulated.
This breakthrough offers a new frontier for understanding and treating neurological conditions. By using these 3D in vitro models, scientists can pinpoint exactly where the developmental process goes awry in disorders such as autism, schizophrenia, or ALS. This ability to reconstruct neural development and dissect the mechanisms that shape it brings researchers closer to identifying targeted therapies and understanding the common mechanisms behind various neuropsychiatric diseases. Such advancements are vital for uncovering the underlying causes of diverse brain disorders. This work helps demystify the entire nervous system.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: How We're Reverse Engineering the Human Brain in the Lab | Sergiu P. Pasca | TED
- Also: Q&A: Reverse engineering the human brain by growing neural circuits in the
To cite this card, link to https://intellectplus.co.uk/app/ideas-how-we-re-reverse-engineering-the-human-brain-in-the-lab-ser.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
