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Polymicrogyria (PMG) is a developmental malformation of the human brain characterized by an excessive number of small convolutions (gyri) on the surface of the brain. Either the whole surface (generalized) or parts of the surface (focal) can be affected. ==Clinical presentation== The diagnosis of PMG is merely descriptive and is not a disease in itself, nor does it describe the underlying etiology or cause of the brain malformation. Polymicrogyria may in fact be just one piece of a syndrome of developmental abnormalities, because children born with it may suffer from a wide spectrum of other problems, including: global developmental disabilities, mild to severe mental retardation, motor dysfunctions including speech and swallowing problems, respiratory problems, and seizures. Though it is difficult to make a predictable prognosis for children with the diagnosis of PMG, there are some generalized clinical findings according to the areas of the brain that are affected. *Bilateral frontal polymicrogyria (BFP)-Cognitive and motor delay, spastic quadriparesis, epilepsy *Bilateral frontoparietal polymicrogyria (BFPP)-Severe cognitive and motor delay, seizures, dysconjugate gaze, cerebellar dysfunction *Bilateral perisylvian polymicrogyria (BPP)-Pseudobulbar signs, cognitive impairment, epilepsy, some with arthrogryposis and/or lower motor neuron disease *Bilateral parasagittal parieto-occipital polymicrogyria (BPPP)-Partial seizures, some with mental retardation *Bilateral generalized polymicrogyria (BGP)-Cognitive and motor delay of variable severity, seizures 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「polymicrogyria」の詳細全文を読む スポンサード リンク
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