Polymicrogyria, Bilateral Temporooccipital, also known as bilateral parasagittal parieto-occipital polymicrogyria, is related to neuropathy, hereditary sensory, type iic and nescav syndrome, and has symptoms including seizures and hallucinations, visual. An important gene associated with Polymicrogyria, Bilateral Temporooccipital is FIG4 (FIG4 Phosphoinositide 5-Phosphatase). Affiliated tissues include brain and cortex, and related phenotypes are delayed speech and language development and delayed gross motor development