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Bing Wen Brunton
United States
เข้าร่วมเมื่อ 13 ก.ย. 2013
Hi! I'm a scientist who thinks about brains and behavior. I love to talk about math and data. This channel has videos on a variety of topics related to my research and teaching, including Neuroscience, Data Science, and Biology.
My research group at the University of Washington in Seattle develops data-driven techniques inspired by and applied to neuroscience. See my website for more on research and teaching.
Prof. Bing Wen Brunton
University of Washington, Seattle
www.bingbrunton.com/people/
Twitter: bingbrunton
My research group at the University of Washington in Seattle develops data-driven techniques inspired by and applied to neuroscience. See my website for more on research and teaching.
Prof. Bing Wen Brunton
University of Washington, Seattle
www.bingbrunton.com/people/
Twitter: bingbrunton
Visual Computations and Circuits | Receptive Fields | Sparse Coding Hypothesis
Neurons connected to each other in circuits can perform specific computations. Looking at these circuits gives us clues about what they are doing, and understanding these computations helps us understand why we see (or not see) the way that we do.
We introduce each neuron's "receptive field" as a way neuroscientists describe what patterns of photons that neuron responds to: what image makes a visual neuron most excited? Depending on the neuron and where it is in the visual pathway, its receptive field may be a donut, a vertical stripe, a face with two eyes and a mouth, or even a movie of upwards movement. The mathematical operation corresponding to these circuit computation is known as a "convolution," which directly inspired convolutional neural networks in computer vision and AI. Beyond vision, the concept of a receptive field applies to other sensory and motor modalities as well.
Finally, we motivate the sparse coding hypothesis, which postulates that visual circuits have such receptive fields because they are the most efficient way to represent natural images.
Playlist for all videos in series: th-cam.com/play/PLqgZEQsU_8E0l1P9bKR6yKOKPMpoJ_tLR.html
Professor Bing Wen Brunton
www.bingbrunton.com
We introduce each neuron's "receptive field" as a way neuroscientists describe what patterns of photons that neuron responds to: what image makes a visual neuron most excited? Depending on the neuron and where it is in the visual pathway, its receptive field may be a donut, a vertical stripe, a face with two eyes and a mouth, or even a movie of upwards movement. The mathematical operation corresponding to these circuit computation is known as a "convolution," which directly inspired convolutional neural networks in computer vision and AI. Beyond vision, the concept of a receptive field applies to other sensory and motor modalities as well.
Finally, we motivate the sparse coding hypothesis, which postulates that visual circuits have such receptive fields because they are the most efficient way to represent natural images.
Playlist for all videos in series: th-cam.com/play/PLqgZEQsU_8E0l1P9bKR6yKOKPMpoJ_tLR.html
Professor Bing Wen Brunton
www.bingbrunton.com
มุมมอง: 4 808
วีดีโอ
Color vision | Rod and cone cells in the retina
มุมมอง 5K3 หลายเดือนก่อน
This video follows the previous video on the neurobiology of visual perception, and here we are digging into how we see the world in color. We start at the biochemical basis of photo absorption by different rhodopsin molecules in cone photoreceptors, and how the differential activation of cone receptors give rise to our ability to tell light of different wavelengths apart. Bonus: Why is the sky...
Visual perception | Retina, photoreceptors, and rhodopsin
มุมมอง 56K4 หลายเดือนก่อน
We don't see with our eyes, we see with our brains! This video is the first in a series on how the brain senses what's going on in the world. We start at vision, with the organization of the retina, the neurons that sense light, and the rhodopsin molecules in those neurons that transduce photons into activation of the nervous system. Retinas are quite a bit more sophisticated than the photodete...
Non-invasive Methods in Neuroscience, fMRI, MEG, EEG
มุมมอง 2.3K4 หลายเดือนก่อน
This video is an overview of common ways to peer inside brain without brain surgery. These methods rely on the fact that neurons communicate with each other by electrical activity, so we can pick up on some hints of this electrical activity outside the skull using magnetic and electronic measurements. These methods are used for scientific research and clinical applications, in humans and non-hu...
Optical Methods in Neuroscience: Calcium Imaging, Optogenetics
มุมมอง 4.2K5 หลายเดือนก่อน
This video introduces the most commonly used, modern approaches to use light to record and manipulate the activity of neurons in the brain. Because the only thing neuroscientists love more than neurotransmitters is lasers. The methods I highlight include calcium imaging, voltage imaging, and ways to manipulate neural activity using light with optogenetics. I also discuss the advantages, limitat...
Electrical Methods in Neuroscience: Multi-electrode Recordings, Spike Sorting, Raster Plots
มุมมอง 6Kปีที่แล้ว
This video is an overview of historical and modern methods to record from and stimulate neurons using electricity and electronics. Methods covered in the video include intracellular recordings (patch clamping), extracellular recording with sharp electrodes, and multi-electrode arrays. We explain the basics of spike sorting and summarizing the activity of neurons with raster plots. Beyond record...
Coordinates and Sections of the Nervous System
มุมมอง 3.9Kปีที่แล้ว
This video establishes the coordinate system of the brain, including the anterior-posterior axis, the dorsal-ventral axis, and the medial-lateral axis. Since the brain is a 3D structure that is hard to visualize, we also define the most commonly shown sections of the brain: the coronal, horizontal, and the sagittal sections. These coordinates are crucial for talking about the organization of th...
Is the Brain a Computer? | Sensing and Action in the Brain
มุมมอง 3.5Kปีที่แล้ว
Is the brain a computer? Believe it or not, this question is still regularly debated. But more interestingly, why is this a question we even ask, and how did we come to ask it? This video introduces the plan for the second set of lectures in Introduction to Neuroscience, where now we think about how the brain integrates sensations to produce action, which in turn interacts with the external wor...
Drug Addiction and Learning
มุมมอง 4.8Kปีที่แล้ว
One intriguing idea about the mechanism of drug addiction is that it hijacks the same neurophysiological mechanisms underlying natural learning. This short video is a high-level overview of this idea, where I connect the theory of reinforcement learning, prediction error, and dopamine with the action of cocaine & other addictive drugs. Bonus topics: (1) the chemical historical parallels of hero...
(Recreational) Drugs and the Brain
มุมมอง 5Kปีที่แล้ว
Every part of a synapse is a potential target for drugs. (You have likely heard of many of them 😉). This video is a gateway topic between cellular & molecular neurobiology and systems neuroscience every part of a chemical synapse is a known target of (recreational and otherwise) drugs, yet their effects are also determined by which neural systems are involved. Here we take a tour of several rec...
Types of Synapses
มุมมอง 4.4Kปีที่แล้ว
Why do we say that a neuron is a "glutaminergic" or "glycinergic" neuron? Does one neuron necessarily release only one type of neurotransmitter molecular at all its synapses, and do synapses have to involve neurotransmitter release at all? (Short answer, no and no :-) All synapses are not the same. There are many different ways one neuron can affect the electrical activity of another neuron. Th...
Synaptic Transmission at a Chemical Synapse | Quantal Release of Neurotransmitters
มุมมอง 6Kปีที่แล้ว
The human has 86 billion neurons, and every neuron makes 1000 to 10000 connections with other neurons these connections are called synapses. This video introduces the dynamic steps at each synapse, where the activity of the "from" pre-synaptic neuron causes changes in activity in the "to" post-synaptic neuron. The video goes through all the molecular steps involved in a chemical synapse, the me...
Neurotransmitters | Ionotropic and Metabotropic Receptors of the Synapse
มุมมอง 6Kปีที่แล้ว
Neurons' synapses talk in neurotransmitters, and there are lots of neurotransmitters! But what they actually say depends on the post-synaptic receptors that are present to listen. Dopamine, serotonin, glutamate, acetylcholine the This video introduces the major classes of protein receptors responsible for receiving neurotransmitters at chemical synapses: fast ionotropic receptors, and slower me...
Anatomy of a Neuron | Parts of a Synapse
มุมมอง 4.8Kปีที่แล้ว
Neurons are excitable cells this video is about neurons and how they talk to other neurons. The first part of the video highlights how neurons are different in shape from other cell by naming the compartments of a neuron. The second part of the video introduces the parts of a synapse, a specialized part of a neuron that talks to another neuron. The "from" neuron is called the pre-synaptic neuro...
The Action Potential | Myelinated Axons
มุมมอง 7Kปีที่แล้ว
Action potentials are exciting all-or-nothing events in neurons, where a membrane depolarization becomes self-reinforcing and quickly travels down the length of axons. Action potentials are neurons' solutions to passing electrical messages reliably, without fail. This video introduces how voltage-gated ion channels and their positive- and negative-feedback loops explains the characteristic shap...
Active Properties of Neurons | Responses to Current | Cable Equation in Axon Conduction
มุมมอง 7Kปีที่แล้ว
Active Properties of Neurons | Responses to Current | Cable Equation in Axon Conduction
Why do neurons have an electric charge? | Nernst Potential | Resting Potential of Neurons
มุมมอง 15Kปีที่แล้ว
Why do neurons have an electric charge? | Nernst Potential | Resting Potential of Neurons
Animal Electricity | The Neuron Doctrine
มุมมอง 11Kปีที่แล้ว
Animal Electricity | The Neuron Doctrine
Intro to Neuroscience, Overview and goals
มุมมอง 47Kปีที่แล้ว
Intro to Neuroscience, Overview and goals
Data Visualization: Storytelling with Data
มุมมอง 15K5 ปีที่แล้ว
Data Visualization: Storytelling with Data
Sparse Sensor Placement Optimization for Classification (SSPOC)
มุมมอง 11K8 ปีที่แล้ว
Sparse Sensor Placement Optimization for Classification (SSPOC)
absolutely. just the description of the context of when ideas are presented is super interesting and so important to understanding. What a great way to teach history and how we understand things in relation to what is known around it. i was already to take this course and watch all 30 hours but that one made it be a priority for my
The study is great for the theory of Aerospace interstellar exploration, Neuroscience can help in life support as well as shipbuilding like a deck off Earth's orbit as satellites. The metaphor of the brain comparing it as a vehicle for travel with life support and size ratio.
Ok, I'm just here because this is useful for ML
During a tour as a Navy Seal Captain J.B. retrieved a film of actual ALIEN life that had landed in Africa. Commutation was gathered footage revealed an exact description of the film PREDATOR.( SAME CREATOR AKA: GOD)
These videos are amazing, thank you so much
Thank you for the effort and the enthusiasm in teaching. This is a gem that you give away for the love of it, and it is very appreciated <3
I'm excited to watch this video, I learned a lot about this in undergrad as I was working to understand the Fitzhugh-Nagumo model when examining relaxation oscillations.
I love this
and do we know if in the cortex outside is always same eye fibers and inside the other? so might be something about hiting back head result on one expecific eye being vague?
9:22 what I order (that is what I see) vrs what gets delivered (by my eye phone - as in the phone cameras), are always two totally different things
The level of detail in this video was perfect, thank you.
0:26:18 The loss function looks odd. If you try to minimize it as is, both the reconstruction error and the sparsity term will go up, there is either a typo with signs or maybe it's supposed to be maximized instead. Also there is a typo in the text just above the equation (if/is).
Very useful and easy to follow
Thank you for this great course! You, Steve and your team are doing a great job! I heard that the reason for having the retina kind of inside out is that the pigment epithelium is actually required to transform 11-trans retinal back to 11-cis form, so "used" molecules are transferred to the pigment epithelium and "refurbished" ones are transferred back to photoreceptors. Another function of the pigment epithelium is the garbage collection. Each disk in a row or a cone lives only for a few days, new disks push old ones towards pigment epithelium for utilization. So this seemingly bad architecture is actually a smart one :) Octopuses use another kind of photoreceptors called melanopsin, it isomerizes when a photon hits and then re-isomerizes when another photon hits, so it doesn't need the pigment epithelium's help. That’s why they can have another retina layout. There are some tradeoffs, I suppose. I find this explanation reasonable and very interesting. I got it from the course of Medical Neurobiology by Peggy Mason (University of Chicago), it’s available on youtube and I certainly recommend it.
10.5 Photoreceptors th-cam.com/video/pMu8z844KYk/w-d-xo.htmlsi=7anT43T3z2snBRKY 10.8 Non-perceptual Visual Functions th-cam.com/video/prtJ0oPubjU/w-d-xo.htmlsi=izOruw0151blovpO&t=212
Well, I'm here to study some neuroscience to help me better understand machine learning as a subfield of machine learning, neural network is based upon neuroscience
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Valuable information from an intelligent, beautiful woman. What could be better than that?
Thank you for posting this on TH-cam! It’s a privilege to have such content widely available.
Just feeling an Electric pulse device at the highest output. Tingling in the brain has reached across the temporal lobe to the inside feeling of the cerebellum. 🧠 📟🖱 like Algebra yet another class would be necessary.
Sleep deprivation helps during recovery from brain trauma☯️🦇🟰💊.
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This is a super cool lecture series. Highly recommended for anybody interested in systems / cognitive neuroscience.
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Goodmorning dear mam,i am also interested in neurosciences.But i have found an equation in physics Mass.Length is equal to 1.Dear mam can you help me in interpreting this equation from all angles please mam please...!
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I saw bio tech on cctv I am a implant victim and long story precursor of Bluetooth...what I mean is blue tooth was designed out of my Body implant...!Walter Reid Medical Center Andrew's Air Base Maryland Joint Base, Navy Army Marraien.... Very advanced for its time Analog to digital
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🎼☯️🐉➕️🐍🟰🦇🟰💲😂 Twelve years of overcoming a brain injury by kicks in the head by the police. They" peohate my people on "a walk back home in a New Jersey community where I own a house....By the way Chinese 🇨🇳
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"why are we special" - a perfect example of the original "beg the question" (before youtube decided it just means "raise a question". Lightboard studios... and digital watches! Carefully observing wild animals (even fish in the ocean) reveals incredible complexity, social communication, planning. We just like to talk about ourselves more than other animals. (Neuroscience *is* amazing though)
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A question, are these slides available as PPT or PDF, please?
I don't think they are. I mean I couldn't find them anywhere but it maybe out there some where. I might not be looking hard enough