A pioneering research has produced the most intricate map of a mammalian brain ever documented.
The 3D diagrams showcase over two miles of neural connections, nearly 100,000 neurons, and approximately 500 million synaptic junctions—all within a speck of mouse brain tissue not larger than a grain of sand.
Dr. Clay Reid from the Allen Institute for Brain Science in Seattle stated, “Within this minuscule particle lies an intricate network of connections, governed by principles we are just starting to unravel.”
The specimen originates from an external section of the brain called the cortex—a zone implicated in vision processes.
Times
reports.
Dr. Forrest Collman, from the same institute, stated, “Through examining the operations of the cortex in mouse brains, we can develop improved theories and hypotheses regarding the functioning of our human brains.”
His team thinks that having the ability to chart and examine the brain’s inner connections at this scale could pave new avenues for understanding and treating neurological disorders such as
Alzheimer’s
disease, Parkinson’s and autism.
He referred to it as the ‘Google Maps for the brain,’ which goes beyond showing main highways to include each tiny street, individual houses, and even the rooms within those houses.
‘Just like people use Google Maps to figure out the best route from point A to point B, or even to check if a route exists at all, this kind of detailed brain map lets scientists see whether two neurons are connected, and exactly where those connections occur.’
What made this research particularly intriguing was that the mice needed their brain activity documented as they watched YouTube videos. This enabled researchers to observe the interactions between various clusters of neurons.
Following this, they cut the tissue into 25,000 slices, with each slice being merely 1/400th the thickness of a strand of human hair, before examining these sections via powerful electron microscopes.
The images were subsequently combined, and with the help of artificial intelligence, a 3D model was generated. The final result not only depicts the structure but also illustrates which brain cells interact and the manner in which they do so.
Nuno Macarico da Costa from the Allen Institute stated that one of the outcomes of their project reveals “just how extraordinarily beautiful the brain is.”
Adding: ‘Simply observing these neurons allows you to grasp their complexity and size, instilling an overwhelming sense of wonder for the brain.’
Read more
