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Polygyria, dorsal surface of brain

Last updated on Tuesday, April 21 2009 by gliageek

Polygyria, dorsal surface of brain

Polygyria, also sometimes called pseudo-polymicrogyria, is seen in hydrocephalic infants secondary to compression of the developing cortex against the inner table of the skull. Microscopically, cytoarchitectonic disturbances are not identified.

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Poly Gyria Dorsal with arrow

Poly Gyria Dorsal with arrow
Note that there are more and smaller gyri here than you would expect to see in a normal brain. This is polygyria. The unnecessarily large green arrow points to some of these gyri.

Normal Gyri for Comparison

Normal Gyri for Comparison
This brain has normal gyri. Compare these gyri to the brains with polymicrogyria or pachygyria.

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