Dreaming | Processing the Environment | MCAT | Khan Academy

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  • Опубликовано: 19 окт 2024

Комментарии • 6

  • @angijane
    @angijane 10 лет назад +1

    Your videos are all so interesting and helpful!! Thanks for sharing your knowledge! What did you study? Biology?

  • @josephcoon5809
    @josephcoon5809 Год назад

    1:15 I define “logic” as a consistent systemic process which is objective. Similarly, I define rationale/reason as a subjective conclusion based on a heuristic analysis of varying degrees.
    This makes brain functions logical whereas the thoughts and ideas we have rational/irrational depending upon how our neurons are logically arranged.
    So, everything a person does is logical because their actions are determined by the organization of their neurons. However, their actions are irrational/rational depending on the context and who is making the assessment.
    With that explanation established, my comment is about calling the PFC the “logic” center. The entire brain is neuroLOGICally driven, but the PFC makes judgments based on how the entire brain perceives and considers things based on all the conditioning prior.
    People in different cultures can deem actions of individuals of the opposing culture as “irrational” while considering actions of those within their own culture as “rational” because their judgments are based upon their respective social conditioning.
    3:00 So, the difference between first learning a skill, proficiency, and mastery is in the path shape between the components of the skill in question.
    For example, if you are taught to check the tachometer to determine when to begin the gear-shifting process when driving a manual transmission, your PFC has to check the visual information from the visual cortex; process it; then send different signals to the motor cortex for each of the different actions to shift gears: push in the clutch, let off the gas, shift the gear, let off the clutch, and depress the gas pedal. The PFC has to orchestrate that which creates a sharp zigzag path between the PFC and each individual process.
    Constant repetition of these process creates a small cloud of neurotransmitters around all the neurons involved in the processes. A higher concentration of neurotransmitters is created inside the “V” of the path between two adjacent processes which acts like chum for sharks and attracts dendritic growth across the vertex of that V-path. Over time and through many repetitions, the V-shape evolves into a U-shape and continues flattening into a direct path between the two processes in question. This direct path represents SUBconscious processing of adjacent skill processes: mastery. Subcortical communications occurring below the attention of the PFC is what allows the PFC to address the more variable nature of reality by relinquishing the process of a skill through decentralization to cortical regions beneath it.
    Since all that is needed for mastery to occur is repetition of the associated processes, then the signaling to and from the PFC is all that is required for mastery to occur. By cutting the signaling going into the motor cortex, the PFC is free to evolve towards subconscious processing of skills during REM.
    3:30 Another reason for dreams, especially in conjunction with theta waves, is that a bulk of your conscious hours are spent in alpha and beta waves which are more conducive to collecting information and applying information. Alpha and beta are for building. However, problem-solving require creativity which means combining ideas that are not normally associated with one another through alpha and beta waves.
    Like AM radio waves, theta waves a longer wavelengths that travel further but carry less information. They are easily drowned out by the more energetic alpha and beta of direct conscious thought. Theta waves allow ideas across the whole brain to make connections with each other based on harmonious wave patterns generated by their respective neuronal configurations.
    All ideas have an associated waveform based on a neuronal configuration. How those configurations are perceived depend on what those formations are connected to. However, ideas that are not similar in the concrete can be exactly the same in the abstract: not connected to other networks.
    An example of this is two situations my physics professor poses to us. The first is an invading army sufficient to defeat a castle, BUT to get to the castle are eight bridges, each of which could only support an eighth of the army at once. So sending the army down any one path would allow the defending armies enough time to defeat each portion of the army coming over the bridge.
    While we thought about that, he explained radiation therapy for cancer and that the problem with radiation therapy is that any beam sufficiently powerful enough to destroy the cancer cells in a tumor is also sufficiently powerful enough to destroy the healthy tissue going into the tumor and coming out of it. A bean low enough in power to prevent damage to the healthy tissues on the way in and on the way out is also insufficient to damage the tumor cells.
    The point being, while different situations in reality, they were the same problem in the abstract. By dividing the army/beam into eight portions of lesser strength/power then sending them down different bridges/tissues to converge at the castle/tumor at the same time would provide enough strength/power to defeat/destroy the castle/tumor.
    Most people don’t practice the theta waves necessary to make such leaps of logic (connect one logical pattern of neurons in one part of the brain to a similar logical pattern of neurons in another part of the brain), and many do not give themselves the high quality sleep necessary for their brains to do so when unconscious.
    I believe the main driving force behind dreams is the ideas in the cerebrum which are strongly connected to the limbic system act as an attractive force for those theta waves. Highly negative emotional ideas tend to represent problems which the conscious brain is ineffective in solving. REM sleep allows the cerebrum to try associating multiple ideas to that “problem” in an attempt to find a solution.
    Instead of the alpha and beta waves trying one idea at a time (like a read/write head on a conventional hard drive), theta waves provide random parallel access for each idea to the problem (like RAM on a motherboard).
    Another way to look at it is like alpha and beta waves acting as stage lights for a few actors at a time forcing all attention on those and none on the millions in the audience waiting for their 15 minutes of fame. While theta waves are like the overhead lights which allow the millions in the audience to mingle with each other at the same time while the stage lights are turned off.

  • @WojciechKuzebski
    @WojciechKuzebski 11 месяцев назад

    I've heard that dreaming's purpose is emotions processing.

  • @nicitakhattar1160
    @nicitakhattar1160 10 лет назад +3

    According to me dreams serve no real purpose maybe they are just a summary of your day, the things that are stored by your unconscious brain are replayed through dreams and maybe so you just end up remembering things that are important according to your brain.

  • @BarunKumar-nu1lb
    @BarunKumar-nu1lb 4 года назад +1

    Sorry but your vioce is not very much clear...u should improve it.