Tiny physical nudges from stiff tissue actually help guide your growing brain cells
Growing neurons navigate the developing brain not just through chemical signals, but by physically feeling their way across tissues of varying stiffness to reach their correct destinations.
Developing axons act like tiny explorers that sense the mechanical properties of their environment. By pushing against surrounding tissue, these nerve fibers detect subtle differences in stiffness that tell them exactly where to turn. Scientists have observed that neurons in the visual system prefer softer paths, actively avoiding tougher areas to ensure they connect to the right part of the brain.
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