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Eye-Brain Connection?

Don Wade April 29, 2021 at 14:30 8450 views 36 comments
The eye and brain seem to work well together - but which came first - the eye, or the brain? Or, did they develop at the same time as a part of each other?

Comments (36)

spirit-salamander April 29, 2021 at 14:38 #529218
Reply to Don Wade I think both the optic nerve and the neurons of the brain belong to the total nervous system of the organism. Because the optic nerve, like the sense of touch, is the access to the outside world and the brain is the external world data processing entity. Therefore, neither can precede the other in development. Both have developed simultaneously.

An interesting question would be where the color qualia take place. In the eye or in the brain?

counterpunch April 29, 2021 at 14:46 #529222
The brain came first. It is possible to have a central nervous system without eyes, but not possible to have eyes without a central nervous system.
spirit-salamander April 29, 2021 at 14:49 #529224
Reply to counterpunch Phylogenetically you are right, but ontogentically, concerning humans, maybe not.
counterpunch April 29, 2021 at 15:00 #529227
Quoting spirit-salamander
Phylogenetically you are right, but ontogentically, concerning humans, maybe not.


Any organism that has eyes has a brain, including our primitive ancestors. We had eyes before we had intellectual intelligence, that's true, but interestingly, there's no increase in cranial capacity evident at the point in time where human artefacts demonstrate the sudden occurrence of truly human intelligence. Cave painting, burial of the dead, jewellery, improved tools etc.
DingoJones April 29, 2021 at 15:54 #529240
Your eye IS your brain. Human eyes literally grow out from the brain as it develops. Your eyes and brain are essentially the same organ so its not a matter of which came first.
Don Wade April 29, 2021 at 18:02 #529278
Reply to DingoJones This is the sort of question I begin to ask. How did the eye-brain connection take place? Why would either one communicate with the other - especially if one didn't know the other existed. Is there a reason why nerves would grow from one to the other? The eye didn't have a brain, and the brain didn't have an eye - so, which one grew the nerves first? Or, as Dingo says: Quoting DingoJones
Your eye IS your brain.


Don Wade April 29, 2021 at 18:07 #529280
Reply to spirit-salamander Quoting spirit-salamander
Therefore, neither can precede the other in development. Both have developed simultaneously.


Then would either anticipate the need for the other?
spirit-salamander April 29, 2021 at 18:16 #529284
Quoting Don Wade
Then would either anticipate the need for the other?


Good difficult question. Maybe not. Basically, the retina itself is like a small brain and the brain by itself is like a sense that can respond to stimuli. So both are of the same essence, but in humans they operate together for complex external world perception. The cooperation has been laid down in the genetic blueprint.

How the development and the interaction of both looks like might be observed empirically at the example of animals with a special microscope camera. [edit: corrected some wording mistakes]
Don Wade April 29, 2021 at 18:36 #529292
Reply to counterpunch Quoting counterpunch
The brain came first. It is possible to have a central nervous system without eyes, but not possible to have eyes without a central nervous system.


In a single-cell animal - does the DNA speak to itself?
DingoJones April 29, 2021 at 18:37 #529293
Reply to Don Wade

Your eyes are pieces of your brain. They did not connect with each other at some point in our evolution. The brain grows, and part of it grows into the eye sockets and becomes your eyes.
Don Wade April 29, 2021 at 18:41 #529295
Reply to DingoJones When a single-cell splits - do they still communicate?
spirit-salamander April 29, 2021 at 18:58 #529300
Quoting Don Wade
Then would either anticipate the need for the other?


You can also bring in the fringe science here, and say that both always operate within a morphogenetic field (Rupert Sheldrake) that provides unification and communication between the two.
Jack Cummins April 29, 2021 at 19:05 #529301
Reply to Don Wade

You may think that I am opposing you, in what I am saying against reductive explanations, and I am not really trying to do that, because I come with some history of eye disorder. A few years ago I had headaches, after a period of stress. I went to an optician who picked up some underlying retinal disorders. I was referred to an eye clinic, and given a possible diagnosis of Coates disease. I researched this, which is a genetic disorder, rare but most common in males under 10 years old. I am an adult, so was rather puzzled, and I have been discharged as my eyesight is stable.

I am interested in what the eyes say about the brain and the mind, but I think that it is complex because the retina is part of a brain.I wonder if the eye problems which were picked up were connected to all the reading and thinking which I do. The eyes and the brain are part of the apparatus of our thinking, and perhaps they become overwhelmed and overloaded at times, but perhaps this needs to be seen in a wider scope of mind.
.
Don Wade April 29, 2021 at 19:48 #529316
Reply to Jack Cummins Quoting Jack Cummins
I am interested in what the eyes say about the brain and the mind, but I think that it is complex because the retina is part of a brain.I wonder if the eye problems which were picked up were connected to all the reading and thinking which I do. The eyes and the brain are part of the apparatus of our thinking, and perhaps they become overwhelmed and overloaded at times, but perhaps this needs to be seen in a wider scope of mind.


Jack, as always, I really appreciate your thoughts and comments. Thinking is complex! Thinking philosophically seems to be a lot more complex - but, is enjoyable. I wish you well in your quest for understanding, and your postings seems to indicate you may also enjoy philosophy.

The eye-brain system that we enjoy as humans fascinates me and I "see" a lot of questions. Many of the questions have been around since philosophy first started.
Pop April 29, 2021 at 20:47 #529329
Quoting Don Wade
The eye and brain seem to work well together - but which came first - the eye, or the brain? Or, did they develop at the same time as a part of each other?


You might find this interesting.
Don Wade April 29, 2021 at 23:58 #529433
Reply to Pop Quoting Pop
You might find this interesting.


Very useful information. Thanks! Now, as usual, a whole bunch of new questions.
Pop April 30, 2021 at 01:14 #529452
Quoting Don Wade
Now, as usual, a whole bunch of new questions.


Yeah, sorry about that, but I think it is better to ask these questions sooner rather then later - once your mind is already made up. I think it provides a really good view of how all the functions are present at a very fundamental stage, and then they evolve together.
TheMadFool April 30, 2021 at 04:58 #529500
Reply to Don Wade Of questionable veracity is the claim that there are unicellular organisms, brainless as it were, that are [s]phototropic[/s] phototactic.
Pop April 30, 2021 at 07:00 #529510
Don Wade April 30, 2021 at 13:22 #529567
Reply to Pop A single-cell seems to be able to find all kinds of ways to communicate, or find food/sex. I study "Levels", and in levels, communication can happen between cells - as well as higher-level animals (made up of cells). However, the different levels don't seem to communicate.
Pantagruel April 30, 2021 at 13:59 #529575
I have an excellent article somewhere on the eye-brain mechanics of the frog's eye - I'll try to find it and post a link

Here tis. I remember when I read it getting a clear picture that the boundaries of cognition are definitely outside of the brain and nervous system.....

https://courses.cit.cornell.edu/bionb4240/Reprints/Lettvin_Maturana_McCulloch%20and%20Pitts_1959.pdf
Pop May 01, 2021 at 01:15 #529855
Quoting Don Wade
?Pop A single-cell seems to be able to find all kinds of ways to communicate, or find food/sex. I study "Levels", and in levels, communication can happen between cells - as well as higher-level animals (made up of cells). However, the different levels don't seem to communicate.


I'm glad you have honed in on the central issue - what causes the integrity of these creatures? Traditionally it has been generally assumed that something central must coordinate all these functions, but on closer inspection no such thing exists ( in physical form at least ). So traditional analytical reductionism is of no use. Science , across the whole spectrum. turns to systems theory to try and understand it. They speak in terms of layers ( I assume this is what you mean by levels ). Systems theory can analyze gross patterns where no particular microscopic pattern can be discerned. What i have gathered of it is that at each layer there exists a synergy that coordinates the organism and gives rise to functional self organization.

The basis of self organization is not yet discernible The leading explanation is that simple energy fluctuations give rise to ultimate self organization, where the gross function is considered an emergent property. Self organization is a property of the gross organism, but also of all of its components . This understanding is the basis for the embodied movement , whose leading exponents are Maturana, Verala, Thompson, and Capra. Their mantra is; " Living systems are cognitive systems, and living as a process is a process of cognition. This statement is valid for all organisms, with or without a nervous system."

Capra goes further and states that " cognition is a reaction to a disturbance in a state ". In saying this he is not necessarily referring to an organism.

As for communication between layers. It is a bottom up causation, so this is a form of communication. Recent research suggests brain structure changes somewhat in line with new thinking. Lifestyle also causes epigenetics to turn some genes off and others on. I'm pretty sure there would be other feedback loops.
Don Wade May 01, 2021 at 13:58 #530012
Reply to Pop Quoting Pop
Traditionally it has been generally assumed that something central must coordinate all these functions, but on closer inspection no such thing exists ( in physical form at least ). So traditional analytical reductionism is of no use. Science , across the whole spectrum. turns to systems theory to try and understand it.


Close, but not quite there. What I believe happens is that we (humans) create the so-called systems (reductionism). Example: The "forest" is a group of trees, not a real seperate item. Humans create the concept of forest insead of group-of-trees. Then we speak in terms of forest as if the forest actually existed. We (humans) do that a lot. That function is actually a process of our mind called "grouping". Our mind(s) can only handle a specific number (below 10) of items at any specific time - so, the mind seperates a large group of items into more manageable small groups - such as a large group of trees becomes a forest (not a large group of trees). Then, on top of that, our minds changes "focus". And we think of a forest as a single item - while, at the same time, (forgetting the group of trees) - to focus on the forest. Levels is a mental process that allows us to recognize, both the group of trees - and the forest - at the same time. (Not forget one just to focus on the other.) It does take some mental training to do that but it gives one a new insight on: "What is existence?". Note: That's not metaphysical - it's just a mental process.
Pop May 01, 2021 at 22:55 #530196
Quoting Don Wade
Humans create the concept of forest insead of group-of-trees. Then we speak in terms of forest as if the forest actually existed.


Perhaps a Forrest is not the ideal analogy to make your point. Forests are different to trees in the same way that cells are different to organs. In ecology a forest is called an ecological community- the members of the community are interdependent - exchanging nutrients, and resources even communicating. I live in a swamp schlerophyll ecological community ( forrest ). The trees and plants that are members of the community always occur together, and they exclude other plant species that are not part of their community.

The largest organism in the world has survived relatively unnoticed within the Fishlake National Forest in Utah. Now, researchers are concerned that this organism, 1,000's of years old, is dying. The organism is named Pando, Latin for I spread, and is a massive grove of quaking aspens.

You seem to be to be trying to articulate how consciousness groups things, and then saying the groupings are what the things being grouped become? Yes there is an element of that occurring. Piaget's constructivism is a good example of how knowledge is accumulated, and then how that knowledge becomes the world via an idealist paradigm. No doubt the nature of consciousness ( both it's content and it's structure ) places a limitation on our perception of the world.

BC May 02, 2021 at 00:10 #530262
Reply to DingoJones At least the retina, optic nerve, and brain are the same system.

Is the relationship between the ears (the essential sensory part, not the floppy exterior) the same as the brain? Eyes and brain may have a longer lineage than ear and brain--maybe. The bones of the inner ear were once working parts of the jaw. Over a couple of generations they shrank and migrated rearward and found something new to do with themselves. (As told in Your Inner Fish: A Journey into the 3.5-Billion-Year History of the Human Body by Neil Shubin. good book

It seems to me I read that "eyes" were 'invented' in primitive animals as a few cells that could respond to light. Whether they made a difference to the creature by informing a central nervous system of the dawn's early light, or whether they emitted a chemical signal, don't remember.
Pop May 02, 2021 at 00:41 #530287
Quoting Bitter Crank
It seems to me I read that "eyes" were 'invented' in primitive animals as a few cells that could respond to light. Whether they made a difference to the creature by informing a central nervous system of the dawn's early light, or whether they emitted a chemical signal, don't remember.


In the absence of a brain and nervous system what is causing them to self organize?

This article is relevant to the question.
Don Wade May 02, 2021 at 00:45 #530293
Reply to Pop Quoting Pop
You seem to be to be trying to articulate how consciousness groups things, and then saying the groupings are what the things being grouped become? Yes there is an element of that occurring. Piaget's constructivism is a good example of how knowledge is accumulated, and then how that knowledge becomes the world via an idealist paradigm. No doubt the nature of consciousness ( both it's content and it's structure ) places a limitation on our perception of the world.


This is a good example of how one may group information, but "levels" is hierarchical groupings. That is, the various groupings the brain creates are not all on the same level - and can exist in the same place and at the same time as other groupings. Individual items cannot do that. Example: one apple cannot occupy the same place, at the same time, as another apple. But, an apple seed, and the apple, can occupy the same place at the same time. The properties of the apple, and the properties of the apple seed, can be envisioned to occupy the same place - at the same time. Both groups of properties (as envisioned by the brain) are at different levels - not the same level. Another example is: "The Sorites Paradox". (The pile of sand is at a different level than the grain of sand.)
RogueAI May 02, 2021 at 01:17 #530299
Reply to spirit-salamander It seems fantastical that a creature could simultaneously evolve an apparatus for seeing and an apparatus for processing the visual information by chance. We know it happened because of the fossil record, but we don't know what the odds of that happening randomly are because with a sample size of one, we can't conclude that evolution on Earth was an entirely random process.
Pop May 02, 2021 at 01:21 #530300
Quoting Don Wade
Another example is: "The Sorites Paradox". (The pile of sand is at a different level than the grain of sand.)


In my understanding the Sorties Paradox is just an illustration of how vague questions lead to vague answers - to answer the question definitely, one must remove any vagueness ( pile ) from the question initially, lest the answer will also be vague. An interesting quirk of logic, sure to doom any theory that proceeds on this basis.

Quoting Don Wade
an apple seed, and the apple, can occupy the same place at the same time.


What you have stated here is not logical. Two things cannot occupy the same space at the same time. because if they did then they would be the same thing. Whilst a seed is within an apple, an apple is not within a seed. An apple does not occupy the same space as the seed. It occupies more space then the seed. I think your point needs rephrasing.

You may say the totality of all the components of an apple cause an apple to be - this would be how systems and complexity theory would put it.

BC May 02, 2021 at 02:33 #530316
Quoting Pop
In the absence of a brain and nervous system what is causing them to self organize?


I don't know. DNA, and proximity to same and other cell types seems to be part of how cells organize themselves into tissues and organs. But then, one step back, why did DNA and the cells begin self-organizing in the first place?

C. elegans shows how it is done--hear all about it at OpenWorm from UCLA. I don't think C. elegans has any visual capacity. It is composed of 900-1000 cells (depending on whether it is hermaphrodite (gender fluid?) or male. It's 300+ neurons enable it to behave and even learn a thing or two.

Like I said, I don't know -- but as your link showed, some sort of visual response ability appeared long before there was a central nervous system to which an eye could attach itself. One possibility might be that the first visual capacity in multi-cellular animals may have originated in nerve cells to start with. The critical part of the eye is the retina made up of nerve-receivers. The rest of what is now the eyeball is the camera without the film. So to continue the figure of speech, the "camera" started with film and then added the chassis, lens, etc.
Pop May 02, 2021 at 05:02 #530355
Reply to Bitter Crank Thanks for the reply.

Quoting Bitter Crank
So to continue the figure of speech, the "camera" started with film and then added the chassis, lens, etc.


Yeah, in minor evolutionary increments, such as to give the impression of determinism with a small amount of randomness causing variation.

Quoting Bitter Crank
I don't know. DNA, and proximity to same and other cell types seems to be part of how cells organize themselves into tissues and organs. But then, one step back, why did DNA and the cells begin self-organizing in the first place?


I think its because self organization is the nature of our universe. There isn't an alternative course of action - you either self organize, or you become part of something else's self organization. Self organization seems to drive evolution, whilst natural selection culls non viable self organization, so in the long run the self organization improves.

Don Wade May 02, 2021 at 13:27 #530470
Reply to Pop Quoting Pop
an apple seed, and the apple, can occupy the same place at the same time.
— Don Wade[quote="Pop;530300"]What you have stated here is not logical. Two things cannot occupy the same space at the same time. because if they did then they would be the same thing. Whilst a seed is within an apple, an apple is not within a seed. An apple does not occupy the same space as the seed. It occupies more space then the seed. I think your point needs rephrasing.


Thanks again for your response! Then let's look at the question: "When is an apple seed an apple seed?" I believe that while the seed is still in the apple it is still a seed. (Even though it is also part of the apple, at the same time.) The seed doesn't need to be visible in order to exist. If we say the seed only exists when it's not in the apple would deny the seeds existence almost all the time. Apple seeds exist as does other masses. The problem is in our traditional way of perceiving the seed (in our mind) - not in the existence of the seed.
BC May 02, 2021 at 20:37 #530652
Quoting Pop
I think its because self organization is the nature of our universe.


Basic features like gravity led to the 'self-organized' formation of star systems galaxies, and galaxy groups just as earlier, basic physics led to the formation of atoms. If it wasn't for atoms and molecules self-connecting there would not be any life.

So, I find a lot of credence in your assertion that the universe is self-organizing.

Quoting Pop
Yeah, in minor evolutionary increments, such as to give the impression of determinism with a small amount of randomness causing variation.


Our pattern seeing, purpose detecting proclivities seem to lead us to determinism of one sort or another. God intended, the laws of physics required, evolution insists on... But given the vast amount of time that short-lived organisms have had to develop, the deterministic rule might be "If it 'works' it stays."

Good discussion.
Pop May 03, 2021 at 03:12 #530802
Quoting Bitter Crank
But given the vast amount of time that short-lived organisms have had to develop, the deterministic rule might be "If it 'works' it stays."


Yes, or If a niche works it stays filled.

Quoting Bitter Crank
I find a lot of credence in your assertion


I arrived at it in my own quirky way, but its an idea that really belongs to systems and complexity theory.
The first contemporary exponent, that I'm aware of, was a genius who died quite young. Erich Jantsch wrote "the self organizing universe" in 1951. Since then there have been others, and of late Neil Theise is probably the loudest voice, but its not a widely encountered concept in my experience. It ought to be, imo, as its very powerful theoretically - as a concept that is the cause of everything!
Pop May 03, 2021 at 03:22 #530805
Quoting Don Wade
Thanks again for your response! Then let's look at the question: "When is an apple seed an apple seed?" I believe that while the seed is still in the apple it is still a seed. (Even though it is also part of the apple, at the same time.) The seed doesn't need to be visible in order to exist. If we say the seed only exists when it's not in the apple would deny the seeds existence almost all the time. Apple seeds exist as does other masses. The problem is in our traditional way of perceiving the seed (in our mind) - not in the existence of the seed.


Sorry, but I'm not really following you. I accept that the seed and apple are enmeshed conceptually. But the logic of the enmeshment is quite clear. The relationship of the elements cause the whole - in this case an apple.
Don Wade May 03, 2021 at 13:25 #530931
Reply to Pop Quoting Pop
Sorry, but I'm not really following you. I accept that the seed and apple are enmeshed conceptually. But the logic of the enmeshment is quite clear. The relationship of the elements cause the whole - in this case an apple.


I understand Pop. I'm glad you communicated at all. Your "understanding" is what almost all people feel. It's not easy to convince people of new concepts.