[Amps] Here's a Shocker

[Will Matney]

Mike,

The way it was explained to me, nerve transmissions run at a certain 
frequency and it was a low one. When I had the EMG a while back, they 
insert a needle deep into a muscle, close to the nerves, with a lead 
attached. Then a ground patch is placed on the body. When the muscle if 
fully relaxed, there is no sound from a speaker. When the nerve conducts 
and sends signals to the muscle making it act, a static would come over 
the speaker. It would gradually decrease as the muscle relaxed. If the 
muscle was flexed, the speed and static would increase. This shows 
whether there's any nervous system damage which works the muscles like 
from MS, etc. This test is merely an amplified electrical signal that's 
being generated by the nerve(s) and put across a speaker. If it wasn't 
an alternating signal, there would be no static sound from the speaker, 
maybe only a few ticks or so. The frequency is how fast the signal goes 
to the brain back and forth. I don't know if Doc is reading any of this 
but he'd probably know about any frequencies, etc. Anyhow, if anyone 
comes across any information about this, I would like to know.

Best & 73's

Will Matney



Michael Tope wrote:

>Seems to me that it is very important here to properly distinguish
>between the level of nervous system response (ouch factor) and
>the level of tissue damage or bio-function disruption (R.I.P. factor).
>In terms of human safety you want the mains operating at a frequency
>where the ratio of nervous system response (ouch factor) to bodily
>harm (R.I.P. factor) is the highest.
>
>It was my understanding that the average threshold for cardiac
>arrest was about 40mA through the chest area. I didn't consider
>that it might have a frequency dependence. Or is it just the shock
>sensation level (as opposed to the harm level) that has the
>frequency dependence?
>
>Mike, W4EF.....................................
>
>
>----- Original Message -----
>From: "Bill Turner" <dezrat1242 at ispwest.com>
>To: "John Lawson" <jpl15 at panix.com>
>Cc: <amps at contesting.com>; "Will Matney" <craxd1 at ezwv.com>
>Sent: Monday, November 15, 2004 5:49 PM
>Subject: Re: [Amps] Here's a Shocker
>
>
>  
>
>>On Mon, 15 Nov 2004 15:09:23 -0500 (EST), John Lawson wrote:
>>
>>    
>>
>>>  Will, there is no 'natural' frequency for any mammalian nervous
>>>      
>>>
>systems.
>  
>
>>_________________________________________________________
>>
>>Sorry, but there is indeed, at least in the humans who volunteered for
>>my testing.  (I'm using the word "testing" pretty loosely, here.
>>Mostly just a few guys being curious).
>>
>>This was many years ago, back in the '60s when I was employed at a
>>defense contractor.  In our spare time, a few of my co-workers and I
>>were curious about the body's response to different voltages and
>>currents, and we had access to a variable frequency sine wave
>>generator which could put out from zero to 100 or so VRMS.  To make a
>>long story short, we found that frequencies above about 600-800 Hz
>>caused no shock effect at all, up to the voltage we had available.
>>
>>And in response to your "natural" frequency comment, by far the most
>>shocking frequency was about 10 Hz, far more shocking than frequencies
>>higher or lower, including DC.  As the frequency was swept, there was
>>a definite peaking effect, and so, I would suggest the natural
>>resonance frequency of the human nervous system is about 10 Hz.
>>
>>If Mr. Lawson can lose the snotty, condescending tone in his posts, I
>>would be glad to hear from him.  Otherwise, don't bother.
>>
>>--
>>Bill W6WRT
>>
>>_______________________________________________
>>Amps mailing list
>>Amps at contesting.com
>>http://lists.contesting.com/mailman/listinfo/amps
>>    
>>
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