A disorder characterized by the underdevelopment of the cortical gyri in the 11^th to 13^th week of development is called: A)lisencephaly. B)spina bifida. C)arborencephaly. D)gyriencephaly.

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Lisencephaly is a disorder characterized by the underdevelopment of the cortical gyri in the 11th to 13th week of development. This results in a smooth brain surface and can lead to severe neurological deficits. Spina bifida is a neural tube defect that affects the spinal cord, not the brain. Arborencephaly and gyriencephaly are not recognized medical terms.

A Disorder Characterized by the Underdevelopment of the Cortical Gyri