In this video we will explore a very interesting paper published in Nature in 2022, which describes the hidden torus in the neuronal activity of cells in the entorhinal cortex, known as grid cells.
My name is Artem, Iâm a computational neuroscience student and researcher.
In this video we will talk about the fundamental role of lognormal distribution in neuroscience. First, we will derive it through Central Limit Theorem, and then explore how it support brain operations on many scales â from cells to perception.
REFERENCES:
1. BuzsĂĄki, G. & Mizuseki, K. The log-dynamic brain: how skewed distributions affect network operations. Nat Rev Neurosci 15264â278 (2014). 2. Ikegaya, Y. et al. Interpyramid Spike Transmission Stabilizes the Sparseness of Recurrent Network Activity. Cerebral Cortex 23293â304 (2013). 3. Loewenstein, Y., Kuras, A. & Rumpel, S. Multiplicative Dynamics Underlie the Emergence of the Log-Normal Distribution of Spine Sizes in the Neocortex In Vivo. Journal of Neuroscience 31, 9481â9488 (2011). 4. Morales-Gregorio, A., van Meegen, A. & van Albada, S. J. Ubiquitous lognormal distribution of neuron densities across mammalian cerebral cortex. http://biorxiv.org/lookup/doi/10.1101/2022.03.17.480842 (2022) doi:10.1101/2022.03.17.480842.
Things are moving at lightning speed in AI Land. On Friday, a software developer named Georgi Gerganov created a tool called âllama.cppâ that can run Metaâs new GPT-3-class AI large language model, LLaMA, locally on a Mac laptop. Soon thereafter, people worked out how to run LLaMA on Windows as well. Then someone showed it running on a Pixel 6 phone, and next came a Raspberry Pi (albeit running very slowly).
But letâs back up a minute, because weâre not quite there yet. (At least not todayâas in literally today, March 13, 2023.) But what will arrive next week, no one knows.
Through a vast network of nerve fibers, electrical signals are constantly traveling across the brain. This complicated activity is what ultimately gives rise to our thoughts, emotions, and behaviors â but also possibly to mental health and neurological problems when things go wrong.
Brain stimulation is an emerging treatment for such disorders. Stimulating a region of your brain with electrical or magnetic pulses will trigger a cascade of signals through your network of nerve connections.
However, at the moment, scientists are not quite sure how these cascades travel to impact the activity of your brain as a whole â an important missing piece that limits the benefits of brain stimulation therapies.
In this video, Unveiled takes a closer look at the Planck length â the smallest length imaginable in physics! What would happen if HUMAN BEINGS were this incredibly small? What would reality look like? And how would we understand life, the universe, and everything?
This is Unveiled, giving you incredible answers to extraordinary questions!
Picture this: You might think that ChatGPT is a trendy new invention but what if we told you that it actually first made an appearance in a sci-fi novel?
The Algebraist by Scottish writer Iain M. Banks, published in 2004, featured the idea way before it became a reality. Who knew that a book could predict the future with such accuracy? Itâs almost feels like a conversation that the former Google engineer Blake Lemoine might have had with LaMDA: (Excerpts from page 381 â The Algebraist)
But, this instance is not the first of its kind, where it just goes to show that science fiction can inspire real-life innovation in ways we never thought possible. So, letâs keep an open mind and embrace the unexpectedâ who knows what other wild ideas might become a reality in the future?
