Abnormal Brain Development in FAS
Alcohol consumption during pregnancy disrupts fetal brain development by interfering with neural adhesion proteins that guide neuron growth and by impairing neural plasticity. It also harms neuronal stem and progenitor cells. Importantly, specific regions of the brain have their own sensitive periods, during which they are most susceptible to the teratogenic effects of alcohol.
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Abnormal Brain Development in FAS
A public health nurse is counseling two expectant mothers about the risks of alcohol consumption. Mother A consumed several alcoholic beverages per day during the third and fourth weeks of her pregnancy, a time when she was unaware she was pregnant. Mother B consumed a similar amount of alcohol, but only during the eighth month of her pregnancy. Based on the principles of prenatal development, which statement best analyzes the potential impact on the developing nervous system in these two cases?
A pregnant individual consumes a significant amount of alcohol during the 4th week of gestation, a time when the foundational structures of the nervous system are forming. Another pregnant individual consumes the same amount of alcohol during the 30th week of gestation. Which statement best analyzes the likely impact on the developing fetuses?
Abnormal Brain Development in FAS
During prenatal development, different organ systems form and mature at different times. An individual is exposed to a harmful environmental agent known to cause major structural defects in the central nervous system (like the brain and spinal cord). Based on the principle that vulnerability is highest when a system is first forming, which period of exposure would most likely result in the most severe structural damage to the central nervous system?
During prenatal development, different organ systems form and mature at different times. An individual is exposed to a harmful environmental agent known to cause major structural defects in the central nervous system (like the brain and spinal cord). Based on the principle that vulnerability is highest when a system is first forming, which period of exposure would most likely result in the most severe structural damage to the central nervous system?