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At 02:58 AM 10/11/99 -0500, Don W. wrote:

>What unexplainable stupid behavior have you seen from your
>dive partners diving between 80 and 170 feet (on air) that would
>indicate that they were seriously f____ed and didn't know it?

Lots.  I see several others have already answered this one, so
I'll leave it alone.

>Where are some good chamber studies with less subjective results
>than a binary win/loss chess game indicating the progressive loss
>of mental function at high nitrogen partial pressures?

Try any book on anesthesiology.

Also, here are some of the works I've read:

Kiessling & Maag 1962, Performance Impairment As A Function
Of Nitrogen Narcosis.

Case & Haldane 1941, Human Physiology Under High Pressure.

Bennett & Glass 1961, Electroencephalographic And Other
Changes Induced By High Partial Pressures Of NItrogen.

Fowler 1973, The Effect Of Hyperbaric Air On Short-Tem And
Long-Term Memory.

Kiessling & Maag 1962, Performance Impairment As A Function
Of Nitrogen Narcosis.

Frankenhaeuser 1963, Effects On Psychomotor Functions Of
Different Nitrogen-Oxygen Gas Mixtures At Increased Ambient
Pressures.

Fowler 1973, The Effect Of Hyperbaric Air On Short-Tem And
Long-Term Memory.

Bennett, The Effects Of High Pressures Of Inert Gases On
Auditory Evoked Potentials In Cat Cortex And Reticular
Formation.

Bennet 1963, Neurophysiologic ANd Neuropharmacologic
Investigations In Inert Gas Narcosis.

Bennet & Elliott 1993, The Physiology And Medicine Of Diving

There are tons more.  This is not a poorly researched field.

>Where are some good chamber studies which eliminate the nitrogen
>and study the progressive loss of mental function at high oxygen
>partial pressures?

This one is a little more tricky.  For starters, take a look
at:

http://divermag.com/archives/dec96/divedoctor_Dec96.html

O2 narcosis is still the subject of some debate, though I
can tell you from my own subjective experience that it
does appears to exist.

-Mike Rodriguez
<mikey@ma*.co*>

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