The embryology of spinal dysraphism.

摘要: The theories of abnormal embryogenesis suggested as explanations for the various forms SBA and occult spinal dysraphism appear in some instances too all encompassing, Gardner's hydrodynamic theory or Padget's neuroschisis theory, limited, arrested development proposed by Daniel Strich ACM, just speculative many cases. observation a completed defect does not allow one to venture backwards specific time cause with any accuracy. Perhaps several different causes striking tissues at times can set up series aberrations that lead morphologically similar mature anomalies. ability developmental processes heal themselves, shown experimentally, may obscure true mechanism timing occurrence although final morphological expression be dramatic. Since study human experimental laboratory is ethically unacceptable technically feasible, elucidation mechanisms these neural defects will long coming.