confused or stuporous state caused by high levels of dissolved nitrogen in the blood; "deep-sea divers can suffer nitrogen narcosis from breathing air under high pressure"
Nitrogen narcosis develops with an increase in nitrogen partial pressure, anywhere between 20 and 40 metres. At this depth, nitrogen becomes dissolved in the lipids of the neurons, which interferes with signal transmission from neuron to neuron. Symptoms will increase dramatically with depth and can lead to death.
Nitrogen narcosis or inert gas narcosis is a reversible alteration in consciousness producing a state similar to alcohol intoxication in SCUBA divers at any depth, but commonly beyond 30m. Jacques Cousteau famously described it as the "rapture of the deep". Its precise mechanism is not well understood, but it appears to be a direct effect of high nitrogen pressure on nerve transmission. The onset is hard to recognize, its severity is unpredictable, and it can kill, from its own toxic effect or due to the resulting illogical behaviour. However the cure for nitrogen narcosis is a simple one, as effects disappear upon ascending to shallower waters. source: http://en.wikipedia.org/wiki/Nitrogen_narcosis
depressed mental state from high nitrogen pressure; usually does not begin to manifest on compressed air until below 80 fsw.
Loss of judgment and motor skills caused by the narcotic effect of breathing the nitrogen component of any breathing gas at elevated partial pressures (i.e. at depth). The condition is alleviated upon ascending. Also known as "Rapture of the deep" or "narcs". Nitrogen narcosis, a common form of inert gas narcosis, can be incurred at depths as shallow as 30m, and possibly even shallower by individuals who are more susceptible.
Nitrogen narcosis or inert gas narcosis is a reversible alteration in consciousness producing a state similar to alcohol intoxication in scuba divers at depth. It occurs at any depth, but in most cases doesn't become noticeable until deeper depths. Jacques Cousteau famously described it as the "rapture of the deep".