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> While there are lots of solutions to this wiring problem, the most elegant is to have two bilaterally symmetrical systems of wiring between the brain and the
by anonymouskimmer 4y ago
> While there are lots of solutions to this wiring problem, the most elegant is to have two bilaterally symmetrical systems of wiring between the brain and the body, with the connections from each side of the body crossing the midline.
Wouldn't a 3-D brain mapping also solve this issue? Do we just have this flipped symmetry because neural nets started out non-3-D in simple organisms, and we have all just inherited the 2-D structure as our brains have grown? Were there ever 1-D neural networks, and if so, how did they work?
- rolph 4y agothe problem is mirror image one, when mapping sensory field stimlus, to cortical field state. as far as 1-d networks are concerned, electrical excitation is not an absolute property of neurons. unicellular organisms employ variations of electrical potential to initiate, coordinate, and buffer functions, and future changes of state.
- anonymouskimmer 4y ago> the problem is mirror image one, when mapping sensory field stimlus, to cortical field state. For 3-D mapping onto 3-D I don't understand what you're saying. Except for vision, for which I understand there are optical properties that require image flipping and inversion.
- rolph 4y agolight bounces off objects and travels through the lens of the eye. when light exits the lens it is inverted, so things to your right are projected on the left side of the retina, the left retinae then communicate contralaterally to the right optical cortex. sensory field is the snapshot state of each neuron in a 2-d array. cortical field is same but it is now destined for processing. left and right fields differ by paralax and this difference is used, to construct a 3-d percept
- anonymouskimmer 4y agoI thought by "cortical" you were referring to the cerebral cortex.
- rolph 4y agoyes cortical in this case is applied to the cortical structure, of the optic lobes of the cerebrum, summarized as optical cortex field is the informatic state of all the neural elements, involved. note: these are terms applied in the context of neuroscience.
- svnt 4y agoI also didn’t follow the leap requiring animal experience to represent 3D phenomena in 2D mapping in brain space — it feels like an oversimplification in order to force the peg to fit the hole.
- anonymouskimmer 4y agoI think it has to do with the brain being built up in layers. Even though our brains are 3-D in shape, the layers are effectively thick 2-D surfaces. This is just a guess though.
- rolph 4y agoyou have the proper concept