Author Topic: All things brain...  (Read 9026 times)

Recusant

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Re: All things brain...
« Reply #135 on: November 05, 2018, 03:33:48 PM »
Here's an article that puts forward the idea that consciousness is produced by an ongoing complex feedback loop of energy in the brain. The paper written by the author of the article is also linked below.

"How a trippy 1980s video effect might help to explain consciousness" | The Conversation

Quote
Explaining consciousness is one of the hardest problems in science and philosophy. Recent neuroscientific discoveries suggest that a solution could be within reach – but grasping it will mean rethinking some familiar ideas. Consciousness, I argue in a new paper, may be caused by the way the brain generates loops of energetic feedback, similar to the video feedback that “blossoms” when a video camera is pointed at its own output.

I first saw video feedback in the late 1980s and was instantly entranced. Someone plugged the signal from a clunky video camera into a TV and pointed the lens at the screen, creating a grainy spiralling tunnel. Then the camera was tilted slightly and the tunnel blossomed into a pulsating organic kaleidoscope.

Video feedback is a classic example of complex dynamical behaviour. It arises from the way energy circulating in the system interacts chaotically with the electronic components of the hardware.

[. . .]


Video feedback may be the nearest we have to visualising what conscious processing in the brain is like.
Still from video feedback sequence. Image Credit: Robert Pepperell, 2018

[Continues . . .]

"Religion is fundamentally opposed to everything I hold in veneration — courage, clear thinking, honesty, fairness, and above all, love of the truth."
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xSilverPhinx

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Re: All things brain...
« Reply #136 on: November 05, 2018, 06:59:11 PM »
^ An interesting idea.
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Recusant

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Re: All things brain...
« Reply #137 on: November 05, 2018, 07:26:28 PM »
^ An interesting idea.

 :sidesmile: I am a happy pup.

"Religion is fundamentally opposed to everything I hold in veneration — courage, clear thinking, honesty, fairness, and above all, love of the truth."
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Re: All things brain...
« Reply #138 on: November 05, 2018, 10:27:29 PM »
Give no mercy to your fear.



Icarus

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Re: All things brain...
« Reply #139 on: November 06, 2018, 10:52:40 PM »
Superdog who is happy to do his thing.  Note the wagging tail.   That gif makes me smile

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Re: All things brain...
« Reply #140 on: November 07, 2018, 08:39:51 PM »
Give no mercy to your fear.



Recusant

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Re: All things brain...
« Reply #141 on: February 26, 2019, 01:43:34 AM »
Great progress if accurate. Now to find some way to address it.

"Brain discovery explains a great mystery of Alzheimer's, Parkinson's" | ScienceDaily

Quote
One of the great mysteries of neuroscience may finally have an answer: Scientists at the University of Virginia School of Medicine have identified a potential explanation for the mysterious death of specific brain cells seen in Alzheimer's, Parkinson's and other neurodegenerative diseases.

The new research suggests that the cells may die because of naturally occurring gene variation in brain cells that were, until recently, assumed to be genetically identical. This variation -- called "somatic mosaicism" -- could explain why neurons in the temporal lobe are the first to die in Alzheimer's, for example, and why dopaminergic neurons are the first to die in Parkinson's.

"This has been a big open question in neuroscience, particularly in various neurodegenerative diseases," said neuroscientist Michael McConnell, PhD, of UVA's Center for Brain Immunology and Glia (BIG). "What is this selective vulnerability? What underlies it? And so now, with our work, the hypotheses moving forward are that it could be that different regions of the brain actually have a different garden of these [variations] in young individuals and that sets up different regions for decline later in life."

[Continues . . .]
"Religion is fundamentally opposed to everything I hold in veneration — courage, clear thinking, honesty, fairness, and above all, love of the truth."
— H. L. Mencken


Icarus

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Re: All things brain...
« Reply #142 on: March 03, 2019, 09:26:20 PM »
Here is a discussion about handedness, that is left handed/right handed and how brain regions may influence the preferences.
https://getpocket.com/explore/item/the-evolutionary-mystery-of-left-handedness-and-what-it-reveals-about-how-the-brain-works.

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Re: All things brain...
« Reply #143 on: March 04, 2019, 04:03:22 PM »
Thanks for posting that link, Icarus. The author mentions a Scots fighter from the Kerr family. In my reading about the history of the Borders, I read about the Kerrs, who were a fairly prominent family. They were known for being left-handed, which points to some degree of heritability. On the other hand ( ;) ) the article mentions the example of Charles Darwin, a left-handed man who married a left-handed woman, yet only two of their ten children were left-handed. In my own family there is a couple who are both left-handed, while both of their children are right-handed.

A story in which the functions of the two hemispheres of the brain is examined (the site apparently puts up a paywall after one article unless you sign up, but should be accessible):

"The Brain That Remade Itself" | OneZero

Quote
[Tanner] Collins was three months shy of seven years old when surgeons sliced open his skull and removed a third of his brain’s right hemisphere. For two years prior, a benign tumor had been growing in the back of his brain, eventually reaching the size of a golf ball. The tumor caused a series of disruptive seizures that gave him migraines and kept him from school. Medications did little to treat the problem and made Collins drowsy. By the day of his surgery, Collins was experiencing daily seizures that were growing in severity. He would collapse and be incontinent and sometimes vomit, he says.

[. . .]

Surgeons cut out the entire right occipital lobe and half of the temporal lobe of Collins’ brain. Those lobes are important for processing the information that passes through our eyes’ optic nerves, allowing us to see. These regions are also critical for recognizing faces and objects and attaching corresponding names. There was no way of being sure whether Collins would ever see again, recognize his parents, or even develop normally after the surgery.

And then the miraculous happened: Despite the loss of more than 15 percent of his brain, Collins turned out to be fine.

The one exception is the loss of peripheral vision in his left eye. Though this means Collins will never legally be able to drive, he compensates for his blind spot by moving his head around, scanning a room to create a complete picture. “It’s not like it’s blurred or it’s just black there. It’s, like, all blended,” Collins tells me when I visit him at home in January. “So, it’s like a Bob Ross painting.”

Today, Collins is a critical puzzle piece in an ongoing study of how the human brain can change. That’s because his brain has done something remarkable: The left side has assumed all the responsibilities and tasks of his now largely missing right side.

[Continues . . .]

"Religion is fundamentally opposed to everything I hold in veneration — courage, clear thinking, honesty, fairness, and above all, love of the truth."
— H. L. Mencken


Icarus

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Re: All things brain...
« Reply #144 on: March 06, 2019, 12:12:52 AM »
Here is some more "brain stuff" with  slightly different implications.   https://getpocket.com/explore/item/secrets-of-the-creative-brain

Since all we HAFers have clearly superior creative brain functions, we may all be destined to reside in the loony bin.   :query:

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Re: All things brain...
« Reply #145 on: March 06, 2019, 01:13:02 PM »
Here is some more "brain stuff" with  slightly different implications.   https://getpocket.com/explore/item/secrets-of-the-creative-brain

Since all we HAFers have clearly superior creative brain functions, we may all be destined to reside in the loony bin.   :query:

Very interesting, Icarus!  :studious:
Give no mercy to your fear.