AI Insight
Scientists have discovered that axons, the long fibers that transmit electrical signals between brain cells, are not smooth cylindrical tubes as depicted in textbooks for over a century. Instead, axons naturally display a "string of pearls" structure with periodic swellings along their length. These pearl-like structures appear to be dynamic, changing in response to neural activity, and may play a role in regulating the speed at which electrical signals propagate through the brain.
Why it matters
This fundamental revision of our understanding of brain structure could have significant implications for neuroscience research and our comprehension of how the brain processes information. The dynamic nature of these structures suggests a previously unknown mechanism for regulating neural communication, which could be relevant to understanding neurological disorders and developing new treatments.
Understand the Science
Scientists discovered that brain-cell axons may not be smooth tubes as textbooks have shown for more than a century, but instead naturally resemble strings of tiny pearls. Those pearl-like structures can change with neural activity and may help control how quickly electrical signals travel through the brain.
Source: Textbooks may have misdrawn this basic brain structure for 100 years