One hast to ask whether the attending medical staff should not have tried to rescue the man after he had his heart attack or did they try?
"... While an 87-year-old man with epilepsy was strapped to a machine that scanned his brain, searching for signs of seizures, the patient, unfortunately, suffered a heart attack and died shortly after. But the man’s tragic death offered scientists the opportunity of a lifetime, allowing them to record brain activity 30 seconds prior to and after the patient’s heart stopped beating. ...
The recorded brain waves suggest that, as we die, we experience the same neural activity as during dreaming, recalling memories, or meditating. ..."
The recorded brain waves suggest that, as we die, we experience the same neural activity as during dreaming, recalling memories, or meditating. ..."
From the abstract:
"The neurophysiological footprint of brain activity after cardiac arrest and during near-death experience (NDE) is not well understood. Although a hypoactive state of brain activity has been assumed, experimental animal studies have shown increased activity after cardiac arrest, particularly in the gamma-band, resulting from hypercapnia prior to and cessation of cerebral blood flow after cardiac arrest. No study has yet investigated this matter in humans. Here, we present continuous electroencephalography (EEG) recording from a dying human brain, obtained from an 87-year-old patient undergoing cardiac arrest after traumatic subdural hematoma. An increase of absolute power in gamma activity in the narrow and broad bands and a decrease in theta power is seen after suppression of bilateral hemispheric responses. After cardiac arrest, delta, beta, alpha and gamma power were decreased but a higher percentage of relative gamma power was observed when compared to the interictal interval. Cross-frequency coupling revealed modulation of left-hemispheric gamma activity by alpha and theta rhythms across all windows, even after cessation of cerebral blood flow. The strongest coupling is observed for narrow- and broad-band gamma activity by the alpha waves during left-sided suppression and after cardiac arrest. Albeit the influence of neuronal injury and swelling, our data provide the first evidence from the dying human brain in a non-experimental, real-life acute care clinical setting and advocate that the human brain may possess the capability to generate coordinated activity during the near-death period."
No comments:
Post a Comment