Neuron and Axonal Tracts

Neurons – Core Brain Cell –  201

Neurons – Core Brain Cell – 201

Part 1 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        Doctor, we’ve talked about specific divisions of the brain but the reality is that the brain is connected throughout the brain and there are networks and there are basic communication methodologies that the brain uses. The core to that is the neuron, is that right? Dr. Erin Bigler:            That’s correct. Gordon Johnson:        What’s(…)

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Size of a Neuron and Axon, Number of Neurons in Brain – 202

Size of a Neuron and Axon, Number of Neurons in Brain – 202

Part 2 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        You have two arms. Dr. Erin Bigler:            Yes. Gordon Johnson:        And, we had a hard time getting – my elbow would be much more difficult to get in a position than yours. There are a few more neurons than that in the human brain. Dr. Erin Bigler:            Well some of the best studies,(…)

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Neuron Diagram – The Diagram of a Neuron 203

Neuron Diagram – The Diagram of a Neuron 203

Part 3 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        Doctor, we talked about the neuron using your arm and fingers as a gross model of it and I want to now turn to what I consider, still another gross of model it, which is the diagram on your computer screen. Show us the same parts that you showed us with your hand(…)

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Function of the Neuron – 204

Function of the Neuron – 204

Part 4 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        We have a graphic that actually shows the axonal tracts within the brain, is that correct? Dr. Erin Bigler:            Yes, we have various tools now from the imaging standpoint that actually allow us to look at what we have to call aggregate tracks. So it’s not the individual tract, it’s uh, a series(…)

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Understanding Gray Matter and White Matter – 205

Understanding Gray Matter and White Matter – 205

Part 5 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        Doctor, I want to talk generally about two concepts that are fairly important in the general overview understanding of the brain. The first is the two different hemispheres that there are of the brain, and the second would be the difference between gray matter and white matter. I think on our diagram we(…)

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White Matter Equals Axonal Tracts – 206

White Matter Equals Axonal Tracts – 206

Part 6 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        Doctor, we were talking about the interface between the gray matter and the white matter and the distinction between gray matter and white matter in the brain. Is this white matter that we’re looking at now? Dr. Erin Bigler:            This is white matter. Gordon Johnson:        Can you explain what it is we’re seeing?(…)

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Major Fiber Tracts In Brain – 207

Major Fiber Tracts In Brain – 207

Part 7 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        There are a number of major fiber tract areas but the one that is most often talked about is the corpus callosum, is that right? Dr. Erin Bigler:            Well, it’s the largest and it’s the part of the brain that’s easiest to separate out. Gordon Johnson:        And we can see it clearly in(…)

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Axonal Tract Identification – Name the Fasciculus – 208

Axonal Tract Identification – Name the Fasciculus – 208

Part 8 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        Doctor, I took a few notes on a break of the fasciculus. And I probably said that wrong. But the word is fasciculus, correct? Dr. Erin Bigler:            Fasciculus. Gordon Johnson:        Fasic, fasis – Dr. Erin Bigler:            Fasciculus. Gordon Johnson:        Fasciculus. And I won’t say it again. But we have the uncinate fasciculus. Dr.(…)

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Axon Tractography – 209

Axon Tractography – 209

Part 9 of 9 in the series Neuron and Axonal Tracts

Gordon Johnson:        Doctor, we’ve been talking about the importance of the communication network within the brain, and we talked about the specific fasciculi on our last slide. What we have now is an actual three-dimensional movie of all of those axonal tracts put together. Can you play that movie for us, and kind of explain(…)

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