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    More on brain maturation

    When the brainstem pattern of damage was found in monkeys subjected to
    asphyxia at birth, it was quickly assumed that this was the cause of what was then
    known as "minimal brain dysfunction".  After early delay in motor development, the
    monkeys appeared to "catch up", however Windle commented:

    "The residual deficits of the surviving animals are now inadequate manual
    dexterity and a reduced level of spontaneous activity. . .  They simply do
    not engage in all the activities of normal rhesus monkeys." [69, p83]

    "plasticity" is the great false hope.  Brain growth did not "catch up" in monkeys with
    brainstem lesions caused by asphyxia at birth.  

    Yakovlev and Lecours (1967) found that the inferior colliculi are among the first
    structures to become myelinated (and mature) in the human brain [70].  Damage to
    mature brain tissue is permanent.  Repair did not occur in the brainstem of monkeys
    asphyxiated at birth, and growth of the cerebral cortex was disrupted.

    Synapse formation in the cortex appears to be dependent upon trophic transmitters
    in brainstem structures like the inferior colliculi [71].  Early brainstem impairments
    cannot be considered minimal.  Every effort needs to be made to prevent even the
    briefest lapse in respiration at birth.
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