Abstract
There are many electrophysiological studies concerning saturation excursion dives in hyperbaric environments, that reveal an increase in the theta wave (Procter et al. 1972; Bennett et al. 1982; Naquet et al. 1984). However, in traditional electroencephalography (EEG), no detailed analyses have been done to clarify the nature of the theta wave in this situation because of the restrictions imposed by the environment and the limitations associated with the induction electrode. Therefore, it is necessary to adopt a multielectrode induction recording system. Using the 16-channel recording system we developed (Ueno and Matsuoka 1975), a topographic display of the EEG has been employed to conduct underwater experiments in an attempt to establish the changes occurring in the EEG (in all frequency bands) at different sea depths and to establish a correlation between the regions in which these changes occur.
This investigation was supported by a special grant from the Japanese Ministry of Labor for Studies of Industrial Ecological Sciences
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Bennett PB, Coggin R, Mcleod M (1982) Effect of compression rate on use of trimix to ameliorate HPNS in man to 686 m (2250 ft) Undersea Biomed Res 9:335–351
Daly DD (1975) Genesis of abnormal activity. In: Antorne R (ed) Handbook of electroencephalography and clinical neurophysiology, vol 14/C. Elsevier, Amsterdam, pp 5–10
Matsuoka S, Tokuda H, Ishikawa T (1984) The idea of computer topographic display of EEG for clinical assessment of EEG and evoked potential data. In: Matsumoto K (ed) Topographic electroencephalography in clinical testing. Neuron-sha, Tokyo, pp 23–33 (in Japanese)
Matsuoka S, Okuda S, Wada S, Kadoya C, Ishikawa T, Yamamoto S, Mori M (1987) Topographic characteristics of EEG during a saturation dive to 31 ATA helium-oxygen environment. Clin Encephalogr 29:584–593 (in Japanese)
Naquet R, Lemaire C, Rostain JC (1984) High pressure nervous syndrome: psychometric and clinico-electrophysiological correlations. Philos Trans R Soc Lond [Biol] 304:95–102
Procter LD, Carey CR, Lee RM et al. (1972) Electroencephalographic changes during saturation excursion dives to a simulated sea water depth of 1000 feet. Aerospace Med 43(8): 867–877
Ueno S, Matsuoka S (1975) Topographic display of slow wave types of EEG abnormality in patients with brain lesions. Jpn J Med Electronics Biol Eng 14:118–124 (in Japanese)
Ueno S, Matsuoka S, Mizoguchi T et al. (1975) Topographic computer display of abnormal EEG activities in patients with CNS diseases. Memoirs of the Faculty of Eng, Kyushu Univ 34:195–209
Westmoreland BF, Klass DW (1986) Midline theta rhythm. Arch Neurolog 43:139–141
Yamaguchi Y (1981) Frontal midline theta activity. In: Yamaguchi N, Fujisawa K, (eds). Recent advances in EEG and EMG data processing. Elsevier/North-Holland, Amsterdam, pp 391–396
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Matsuoka, S., Kadoya, C., Okuda, S., Wada, S., Mori, M. (1989). Topographic Characteristics of EEG During a Saturation Dive to a 31 ATA Helium-Oxygen Environment with Specific Reference to Fmθ or FIRDA. In: Maurer, K. (eds) Topographic Brain Mapping of EEG and Evoked Potentials. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72658-3_21
Download citation
DOI: https://doi.org/10.1007/978-3-642-72658-3_21
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-72660-6
Online ISBN: 978-3-642-72658-3
eBook Packages: Springer Book Archive