Vaernes R J, Aarli J A, Kløve H, Tønjum S
Aviat Space Environ Med. 1987 Feb;58(2):155-65.
Six divers were compressed on heliox to 350 m. Repeated neuropsychological and neurological tests were conducted during the dive. Averaged increased tremor during the compression was found. Two divers had major EEG changes, while two divers had a completely normal EEG. Memory was most impaired among the cognitive variables. At 350 m there was some normalization in the EEG, and the tremor levels returned to normal. Memory impairment, however, was sustained. Three months later nine divers performed an open sea dive to 300 m. Whereas minor fatigue effects were found for the experimental dive, examinations after the open sea dive indicated more specific cerebral after effects. An increased tremor, reduced hand grip strength and foot tapping speed, lowered autonomic reactivity, and memory problems were found. Some divers had unequivocal asymmetrical plantar responses and unilateral weak abdominal reflexes, accompanied by EEG changes with corresponding laterality. In three of the divers these signs were not present 1 month later.
六名潜水员在氦氧混合气环境下被压缩至350米深度。潜水过程中进行了多次神经心理学和神经学测试。发现压缩过程中平均震颤增加。两名潜水员脑电图有重大变化，而两名潜水员脑电图完全正常。在认知变量中，记忆受损最为明显。在350米深度时，脑电图有一定程度的恢复正常，震颤水平也恢复正常。然而，记忆障碍仍然存在。三个月后，九名潜水员进行了一次300米的公海潜水。实验潜水发现有轻微疲劳效应，而公海潜水后的检查显示有更具体的脑部后遗症。发现有震颤增加、握力和足部敲击速度降低、自主反应性降低以及记忆问题。一些潜水员有明确的不对称足底反应和单侧腹部反射减弱，并伴有脑电图相应的单侧变化。其中三名潜水员在1个月后这些症状消失。
