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agyria. adj., adj lissencephal´ic.
Congenital lack or underdevelopment of the convolutional pattern of the cerebral cortex.
[G. a- priv. + gyros, circle]
lissencephaly/lis·sen·ceph·a·ly/ (lis″en-sef´ah-le) agyria.lissencephal´ic
lissencephalyNeurology A brain malformation that is isolated or associated with other syndromes–eg, Miller-Dieker syndrome, Norman-Roberts syndrome, characterized by absence–agyria or incomplete development–pachygyria of cerebral gyri Clinical Microcephaly, seizures, profound mental retardation, feeding difficulties, growth retardation, impaired motor activity
Miller,James Q., U.S. physician.
Miller-Dieker syndrome - arrested brain development. Synonym(s): lissencephaly; Norman-Roberts syndrome
a malformation in which the gyri of the cerebral cortex are not normally developed. In dogs it has been associated with behavioral abnormalities, visual deficits, ataxia and seizures. Called also agyria.