Neuronal migration disorder
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Neuronal migration disorder (NMD) refers to a heterogenous group of disorders that, it is supposed, share the same etiopathological mechanism: a variable degree of disruption in the migration of neuroblasts during neurogenesis.[1] The neuronal migration disorders are termed cerebral dysgenesis disorders, brain malformations caused by primary alterations during neurogenesis; on the other hand, brain malformations are highly diverse and refer to any insult to the brain during its formation and maturation due to intrinsic or extrinsic causes that ultimately will alter the normal brain anatomy. However, there is some controversy in the terminology because virtually any malformation will involve neuroblast migration, either primarily or secondarily.
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Brain MRI, T1 weighted on a transversal plane, of an 8-month old boy with lissencephaly. Note the scarce and wide gyri, mostly on the parietal, temporal and occipital lobes, the absence of a true Sylvian fissure, and the augmented thickness of the gray matter. The boy had a severe developmental delay and seizures. | |
Specialty | Neurology |