Author Topic: Medical Myths  (Read 20390 times)

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Offline Skunk_Ape

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Re: Medical Myths
« Reply #300 on: December 19, 2010, 11:57:37 PM »
I remember (vaguely) something from a health class in 5th grade where the nurse was describing how these cells "scrub" foreign particles from the tissue of the lungs, and that the more you smoke the less able they are to keep ahead of the tar you're building up...

My undergrad anatomy prof described something similar. Basically, the cells that line your lungs secrete mucus to protect itself from foreign stuff (e.g., bacteria, viruses), and they also have cilia that move autonomically in such a way as to move that mucus (with the bacteria and viruses, etc., it caught) up and out of the lungs. Smoke causes the cells lining the lungs to retract the cilia, so that junk caught in the mucus, and the mucus itself, is not removed as efficiently. It requires very little smoke to cause retraction of the cilia, and it takes about 3 months for them to re-extend, so in this way, one cigarette a day is similar to a pack or two a day. BUT that's not the same for other, e.g., cardiovascular effects of smoking.

I have a hard time believing that it took 15 years for his lungs to fully recover. The damage to the lungs should take months, not years, to recover, but that isn't necessarily true for other systems in the body. I think it is more likely that he took up jogging 14 years after he quit smoking and only then realized the full benefits of quitting.



disclaimer: I have not thoroughly evaluated the primary literature--I have only a textbook knowledge of this.

Offline Steven Novella

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Re: Medical Myths
« Reply #301 on: December 21, 2010, 10:45:29 AM »
FYI - My Medical Myth course for the Teaching Company (for which I was asking for suggestions) is now available: http://theness.com/neurologicablog/?p=2624

Thanks for all your help. There may one day be a follow up, so any myths that id not make it into part I may find their way into part II
Steven Novella
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snovella@theness.com

Offline Skulker

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Re: Medical Myths
« Reply #302 on: December 21, 2010, 11:08:34 AM »
FYI - My Medical Myth course for the Teaching Company (for which I was asking for suggestions) is now available: http://theness.com/neurologicablog/?p=2624

Thanks for all your help. There may one day be a follow up, so any myths that id not make it into part I may find their way into part II
:dance: :cheers:
No trees were killed in the posting of this message, but a large number of electrons were terribly inconvenienced.

Offline BadIdeaSociety

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Re: Medical Myths
« Reply #303 on: January 14, 2011, 08:09:34 PM »
FYI - My Medical Myth course for the Teaching Company (for which I was asking for suggestions) is now available: http://theness.com/neurologicablog/?p=2624

Thanks for all your help. There may one day be a follow up, so any myths that id not make it into part I may find their way into part II

Read this on my phone while I was heading home from a long day of work. Was pleased to see the download version was 34 dollars, at the time.  When I finally returned to my home PC, the price returned to the MSRP of $129.95.  Refreshed the page I saved on my phone, the sale ended. snoozed and lost.:(

Offline Pak

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Re: Medical Myths
« Reply #304 on: April 16, 2011, 05:47:00 AM »
I don't know if its a myth or not, but does magnoplasm "dehydrated mixture of glycerol and magnesium sulphate" draw out splinters? Why would gunk on the skin do that?
Proving is believing

Offline Bafucin

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Re: Medical Myths
« Reply #305 on: May 02, 2011, 01:22:22 AM »
Low Fat diet makes you live longer/healthier and etc. myths.
Saturated fat clogs your arteries-myth.

Offline Silly Llama

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Re: Medical Myths
« Reply #306 on: May 05, 2011, 10:46:57 PM »
Here's a medical myth that Dr. Novella actually repeated in the first lecture series; people can be sensitive to MSG (monosodium glutamate).  It seems that good studies show that no one is sensitive to it.

http://en.wikipedia.org/wiki/Monosodium_glutamate#Health_concerns

 

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