Fetal Alcohol Syndrome
Perhaps
one of the most undervalued miracles of our everyday world is human
development. This all
begins embryologically around a hollow neural tube that ultimately
develops into a complex nervous system. The central nervous system appears at the beginning of the
third week of development as a slipper-shaped plate of thickened
tissue called the neural plate. The
edges of this tissue elevate and form folds that ultimately develop
into the brain, spinal cord and peripheral nervous system.
Although the timing and order of each developmental event is
relatively well understood now through the study of embryology and
teratology (study of birth defects), it remains nothing short of
amazing that the end result of this process is a unique individual.
The
neuron – the basic constituent of all nervous tissue – is unique
in that it possesses the specialized properties for the initiation and
conduction of electrical impulses that are essential requirements for
a functional nervous system. This
all occurs through specialized intercellular connections that elicit
an electrical potential in the receiving neurons.
The organization of the nervous system and its literally
hundreds of billions of connections usually occurs flawlessly.
Sometimes nature errors and the result is a birth defect but,
more commonly, some mothers make poor behavior choices that result in
the permanent damage of their child’s mind.
In
1973 researchers in the United States published a landmark report
describing a constellation of physical, cognitive and behavioral
abnormalities including gross retardation, distinctly abnormal facial
development and mental retardation known as Fetal Alcohol Syndrome (FAS). This condition results from the mother’s use of ethanol
(alcohol) during her pregnancy. This
alcohol circulates through the woman’s bloodstream and crosses the
placenta, affecting the fetus (baby).
The alcohol interferes with the ability of the fetus to receive
sufficient oxygen and nourishment for normal cell development,
especially in the nervous system.
In
1991 the Journal of the American Medical Association reported that FAS
is the leading known cause of mental retardation and that at least
5,000 infants are born each year with this condition.
When
a pregnant woman drinks alcohol, her baby does too and it is not clear
what amount of alcohol must be consumed before damage
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