ferruginol

High-pressure nervous syndrome (HPNS – also known as high-pressure neurological syndrome) is a neurological and physiological diving disorder which can result when a diver descends below about 500 feet (150 m) using a breathing gas containing helium. The effects experienced, and the severity of those effects, depend on the rate of descent, the depth and percentage of helium.'Helium tremors' were first widely described in 1965 by Royal Navy physiologist Peter B. Bennett, who also founded the Divers ...