Higher brain function in cases with acute carbon monoxide poisoning. A 30 year follow-up study.

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  • ＣＯ中毒症例に見る高次機能障害の経過　炭鉱爆発事故後の３０年間の経過

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Abstract

    A 30 year follow-up study of 24 cases of acute carbonmonoxide poisoning due to mining accidents which were caused by explosions at two coal mines (Miike and Yamano mines) are herein described.<br>    The paitients conditions ranged from relatively moderate to severe among these victims. The duration of conscious disturbance in the acute stage showed a significant correlation to the degree of aphasia, apraxia and agnosia at 4 months after the accident. The average age at the time of the explosions was about thirty-six years of age. Most cases tended to show an improvement in the degree of aphasia, apraxia and agnosia from 10 to 20 year after the accident.<br>    The symptoms of many cases, however, worsened over the next decade probably due to normal aging.<br>    At 30 years after the accidents, the average of age of the patients had become 66 years of age.<br>    The degree of exacerbation, however, did not differ substantially from the degree of aphasia, apraxia and agnosia observed four months after the accident.<br>    In some cases an exacerbation of symptoms was observed to be worse than the degree seen four month after the accident, however, such cases may have also demonstrated complications from CVD association with hypertension and or senile dementia. There was greater improvement in the degree of the higher cortical functions in the later stage than the degree of the lower cortical functions. The symptoms which patients could monitor and evaluate by themselves through such feed back mechanisms in daily life as taking meal tended to improve. Such symptoms included visual inattention, visual disorientaion, ideational apraxia, and agraphia without alexia.<br>    However some symptoms which the patients could not accurately judge by themselves regarding daily life activities demonstrated either an exacerbation or no improvement. Such symptoms included ideomotor apraxia, drawing impairment and agraphia with agnosia.<br>    Based on the above findings the victims of these two mining accidents will continue to require long-term rehabilitation.

Journal

  • Higher Brain Function Research

    Higher Brain Function Research 16 (2), 163-171, 1996

    Japanese Society of Aphasiology (Renamed as Japan Society for Higher Brain Dysfunction)

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