Central Nervous System Diseases [Disease/Finding] High Pressure Neurological Syndrome [Disease/Finding] High Pressure Neurological Syndrome A syndrome related to increased atmospheric pressure and characterized by tremors, nausea, dizziness, decreased motor and mental performance, and SEIZURES. This condition may occur in those who dive deeply (c. 1000 ft) usually while breathing a mixture of oxygen and helium. The condition is associated with a neuroexcitatory effect of helium. C0019537 M0010353 N0000001536 HPNS C3250 D006610 High Pressure Neurological Syndrome High Pressure Neural Syndrome High Pressure Nervous Syndrome 984887 Occupational Diseases [Disease/Finding]