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Thread: In need of information

  1. #1 In need of information 
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    I would like to know some info about the medulla oblongata for example the pulses it sends down the nervous system and it's control on the heartbeat.
    Also if there is a possibility of an outer source by which i mean to connect a sort of artificially made medulla oblongata to the nervous system from outside the body which can be useful in case of brain trauma to keep the heart rate active.
    Thanks in advance.


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  3. #2  
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    If you're only interested in the heart, then a brief surgery to insert a pacemaker (or defibrillator) is really quick and almost routine. As is checking it or even removing it if that's required.

    Personally, I'd be more concerned about control of breathing. Blood pressure might be controlled with drugs once you've got the heart working OK, but I've never heard of any device that connects through the nervous system rather than to an organ or muscle or joint for something so vital as breathing.

    Perhaps one of our medically qualified members might give better information.


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  4. #3  
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    Quote Originally Posted by EyesAndBerg View Post
    I would like to know some info about the medulla oblongata for example the pulses it sends down the nervous system and it's control on the heartbeat.

    Heart rate is controlled by the cardiovascular control center in the medulla oblongata (a part of the brain stem).
    The medulla oblongata is a part of the autonomic division of the nervous system and it influences heart rate via antagonistic control via sympathetic and parasympathetic branches.

    The parasympathetic neurons decrease heart rate via one neurotransmitter, whilst the sympathetic neurons increase heart rate via another neurotransmitter.
    The precise mechanisms are left out in my answer for simplicity, but I have given a similar answer here.

    I do not know if coupling an electronic device to the medulla oblongata is a viable technique, as the brain stem is fairly deep embedded in the brain.


    Source:
    Neuroscience (2nd Ed.): Autonomic Regulation of Cardiovascular Function
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  5. #4  
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    Thanks for the feedback but what i meant was a device, something that could be used by an ambulance in case of emergency and i know that's a defibrillator but a defibrillator is used if the heart gives out by sending pulses through the muscle and restarting the heart based on muscle memory.But if there is brain damage or brain trauma the heart can't work if the medulla oblongata is not working.But the device i had in mind would take over and send it's own pulses down the nervous system in the absence of the medulla oblongata.
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    Have you ever seen a team of resuscitation paramedics doing their job for real?

    I have. On my living room floor.

    There's none of the kind of precision that even a quick, straightforward surgery like inserting a pacemaker involves. CPR is how we get both the heart and the brain working - it's why mouth-to-mouth is no longer used. The objective is to force blood circulation into and through the brain.

    When I say force I do mean force. The team leader will call for the person doing the CPR to change over at 2 minute intervals or more often - you can't keep up the exertion required at the speed required* (minimum 100 per minute, no faster than 120 per minute) for much longer than that. Correctly done, CPR will break at least one rib, preferably more. That results in what the professionals call a "soft" chest - the person doing the CPR no longer needs to counteract the resistance of the ribcage so the compressions to the heart area are much more effective in getting blood to the brain. In the meantime, team members not currently applying CPR are preparing and inserting IV fluids, administering adrenaline shots and firing up and applying external defibrillation.

    The current research on saving both the heart and the brain indicates that cooling the body down immediately may be the best strategy for improving outcomes. Several emergency services already equip ambulances with refrigerated IV bags so that people with catastrophic collapse don't have to wait until they get to ICU or ER before the cooling process begins.

    *The speed of CPR is taught so that people silently sing along to the speed and rhythm of Stayin' Alive.
    (It's a bit of black humour among some health professionals who might tell you that it's exactly the same rhythm and pace as Another One Bites The Dust. I only heard this because a few family members with health jobs were joking about it a few months after these events - they wouldn't have dared say it otherwise. )
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