3 – Complacency, the persisting interpretation
Complacency seems to have been the end result of the experiments on
asphyxia at birth.  The idea is still prevalent that a brief lapse in respiration is
better tolerated by newborn infants than adults.  The adult victim of
drowning, choking or cardiac arrest must be resuscitated within four to eight
minutes at most, to avoid permanent neurological handicap [1].  Visible
damage within the brains of newborn monkeys subjected to asphyxia was
found only if resuscitation was delayed past six minutes; and then the
damage was restricted to what Myers (1972) referred to as "a monotonous
rank-order of brainstem nuclei" which he claimed was never observed in
human cases [2].  Myers was wrong!

Kernicterus, yellow jaundice of brainstem nuclei
Ranck and Windle (1959) though puzzled that brainstem rather than cortical
damage was the result of their experiments on asphyxia at birth commented,
"The human neuropathologic entity most closely resembling the effects of
asphyxia neonatorum in the monkey is kernicterus" [3, 4].  Kernicterus is
classified as one form of cerebral palsy, and is generally thought to be the
result of toxic effects of high bilirubin levels on the brain.

An important thing to keep in mind when considering the supposed toxicity of
bilirubin however is that bilirubin primarily affects a variable "rank order" of
brainstem nuclei, not the cerebral cortex.  Bilirubin staining is not uniform
throughout the brain, but only affects those areas where the blood-brain
barrier has been compromised by anoxia or infection [5, 6].

Wernicke's encephalopathy
Neubuerger (1954) reported a brainstem pattern of damage in a patient who
survived for two weeks after being resuscitated from cardiac arrest suffered
during surgery [7].  Damage of the inferior colliculi (in the midbrain auditory
pathway) was a prominent part of the observed pathology, and Neubuerger
noted the similarity of this brainstem pattern of damage to that of Wernicke's
encephalopathy, a pattern of neuropathology most often associated with
chronic alcohol intoxication [8].

Windle and Myers should perhaps have recognized the brainstem pattern of
damage found in asphyxiated monkeys as a variant of Wernicke's
encephalopathy.  However, Wernicke (1881) reported hemorrhagic
involvement of brainstem nuclei following ingestion of sulfuric acid in one
case and in two cases of chronic alcohol intoxication [9-11].  The ischemic
brainstem damage observed by Windle and Myers in monkeys asphyxiated
at birth was not hemorrhagic.

The damage resulting from asphyxia at birth may have been caused in large
part by clamping the umbilical cord, and thus preventing the transfer of
respiratory blood from the placenta to the lungs and other organs of the
asphyxiated monkeys.  Toxic damage on the other hand is usually
associated with vasodilation and increased blood flow as a response to
poisoning of metabolic enzymes; this has been shown in research like that of
Grünwald et al (1993) on the metabolic effects of alcohol in the brain [12].

Reports of brainstem damage in human infants
Gilles (1963) reported a case of bilateral brainstem lesions in a child that
resembled the pattern of damage found by Ranck and Windle (1959) in
monkeys subjected to asphyxia at birth.  Gilles went further and suggested
the damage in the auditory pathway might be responsible for developmental
language delay [13].

Several other reports of brainstem damage in infants were published during
the 1970s and 1980s [14-22].  Natsume et al. (1995) reported brainstem
damage of "type Myers" found in a newborn infant [22].

Developmental delay in childhood often precedes difficulties in school and
employment problems in adulthood.  Long-term scientific studies are lacking,
but medical records of patients in mental hospitals and prisons indicate, time
and again, that problems existed from early childhood.  The developmentally
delayed child will most often require life-long dependency on others.  
Euphemisms like mild, minor, or minimal are not acceptable, especially when
it's your own child designated at the lower end of "normal limits."
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