"the reason they cross is because....left side... goes to the right". Basically "they cross because they cross". Maybe add that you'll explain *why* in later videos. Polarized light: Haidinger's brushes are subtle, but we do (usually subliminally) see differences in polarization. Enjoying this series so far.
I can understand why the optic nerve merges and sends half of each eye's view to specific hemisphere, perhaps for purpose of depth perception, but you're right, it's weird that pretty much everything on one side of your body is wired to the hemisphere on the other side.
What she's trying to say is not that "the nerves cross over because the nerves cross over," but "the nerves cross over because the information needs to cross over." The reason the information needs to cross over is because most of the _outputs_ cross back. This is because, at a very very early stage in development, the head twists around upside down, (this is during a period of time that the embryo is still essentially a tiny worm.) That's right... our heads really are all "on backwards," developmentally speaking. I think this happens before the notochord is developed, but I'm not sure, but the result is that a lot of things end up having to grow crossed over like this.
This is the best explanation, of how eyeballs work, thank you so much, this was what I was asking for New year's 2020, vision not a virus. The iris, thanks again :)
I never thought biology was much fun, but this is pretty exciting because it's more like physics. And if light travels as a wave, some visual feedback loops must be doing something like a DFT to see specific colors and/or store visual memories, right? Or not. But signal processing is fun. That's cool that octopuses had backside illuminated sensors before Sony. In a dystopian future we'll be growing genetically engineered octopus eyes to install in space telescopes!
At 6 minutes where your talking about the light spectrum , you said lower longer wavelength corresponds to a higher frequency . The shorter the wavelength, the higher the frequency is how the spectrum works.
That was very fascinating. Thank you very much for this Cristal clear explanation.❤ Would you mind to extend this topic in same detail to explain why we watch movies in ca. 24fps ?
What is the reason the two wire cross over to the other side: the left to right side, and the right to the left side? Is it because the reason the wires cross over is to create more length and thus more time to transmit the signals to the back of the brain?
More time to transmit the signals would actually be a problem. The reason why is because very early in development, the head turns around upside down, (at this point in development, the face will be facing up, not "forwards," and thus, turning it around means turning it upside down, not turning it backwards. But ultimately, this makes the head backwards.) this happens before the notochord develops, so there's not a lot of structure to the organism, but a lot of the groundwork, the electrical potentials that tell organs where they need to be placed as they migrate during development, will be laid out across tissues. The body has to cross the signals from the eyes over for them to wind up in the same regions of the brain as the signals from the rest of the body --- left visual signals to where left sensory information is being collected, and right visual signals to where right sensory information is being collected. The evolutionary change that caused this happened sometime after our basal ancestor with arthropods, and you don't see this occur with arthropods during development. Their heads stay right side up. Edit: take some of this with a grain of salt, I may have gotten some detail wrong, but this is how I recall it.
@@peppermintgal4302 Fascinating! Have you followed the breakthrough research by Prof. Michael Levin with flatworms? His study on developmental bioelectricity: ways in which all cells connect in somatic electrical networks that store, process, and act on information to control large-scale body structure. His lab creates and employs tools to read and edit the bioelectric code that guides the proto-cognitive computations of the body, much as neuroscientists are learning to read and write the mental content of the brain. This is very similar to fetus' head turns around, upside down before the notochord develops with electrical potentials that tell where tissues to be located!
An invaluable addition to understanding of temporal superposition Singularity-point relative-timing reciprocation-recirculation Apature of entangled sense-in-common cause-effect holography. Parallel coexistence time-timing sync-duration holography is superposition superspun around the Centre of Logarithmic Time Duration Timing, a self evident fact shown in this video, when you know to expect these wave-pulse-evolution arrangements of information processing.
Translated to human: This video explains a complex concept about how time and events are interconnected. It shows how time and timing can overlap and interact in a way that affects our understanding of cause and effect. Essentially, it highlights how different aspects of time sync up and influence each other, revealing patterns that are easier to recognize once you know what to look for. (So yes, dear comment reader, this above comment makes little sense)
