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16 Possible Causes for Epileptiform Activity, Nodular Heterotopia of the Grey Matter

  • Temporal Lobe Epilepsy

    Heterotopia present as nodular foci of grey matter intensity on all sequences. They do not enhance. Heterotopia Images of a typical subependymal heterotopia.[radiologyassistant.nl] However, little is currently known about the modulation of these networks by epileptiform activity, such as interictal spikes and seizures.[ncbi.nlm.nih.gov] Neurophysiologic findings in NTLE are typically a predominance of lateral temporal interictal epileptiform activity (IEA) and an ictal onset pattern consisting of irregular[ncbi.nlm.nih.gov]

  • Focal Onset Impaired Awareness Seizure

    EEG technologists may use activation procedures such as hyperventilation and photic stimulation to enhance the ability of EEG to detect epileptiform activity.[currentpsychiatry.com] Heterotopia present as nodular foci of grey matter intensity on all sequences. They do not enhance. Heterotopia Images of a typical subependymal heterotopia.[radiologyassistant.nl] An electroencephalogram (EEG) ( Fig 1 ) showed epileptiform activity initiated in the posterior left temporal region, with recruiting activity, irradiated to the left frontal[scielo.br]

  • Occipital Lobe Tumor

    Heterotopia present as nodular foci of grey matter intensity on all sequences. They do not enhance. Heterotopia Images of a typical subependymal heterotopia.[radiologyassistant.nl] […] and multiple areas of epileptiform activity; associated with infantile spasms ice cream headache nickname given to headaches that are cold induced; common in migraine ice-pick[strokecenter.org] There are two types of heterotopia: subependymal and subcortical. The most common clinical presentation is intractable seizures.[radiologyassistant.nl]

  • Infantile Choroidocerebral Calcification Syndrome

    Usually nodular heterotopia at ventricular junction.[radnotes.co.nz] Typical findings include reduced background activity, polymorphic delta activity and epileptiform features.[patient.info] Interictal EEG in Sturge-Weber syndrome shows focal and unilateral depression of the background activity over the area of leptomeningeal agiomatosis ( 9 , 10 ).[synapse.koreamed.org]

  • Ehlers-Danlos Syndrome with Periventricular Heterotopia

    #PinkandYellow #PVNHday #PVNHawareness #PVNHloud PVNH stands for Periventricular Nodular Heterotopia. Sometimes referred to grey matter heterotopia.[pvnhsupport.com] EEG abnormal showed generalized epileptiform activity. She is treated with various anti-epileptic drugs without a total control of her seizures.[n.neurology.org] PNH, Periventricular Nodular Heterotopia, PVNH, Grey matter heterotopia, PVNH4, Subependymal Heterotopia, periventricular heterotopiaPNH Support I established PNH family members[petrometal.pt]

  • Hemimegalencephaly

    Heterotopia present as nodular foci of grey matter intensity on all sequences. They do not enhance. Heterotopia Images of a typical subependymal heterotopia.[radiologyassistant.nl] Serial electroencephalograms demonstrated continued right-sided epileptiform activity with minimal involvement of the left frontal region.[pubs.rsna.org] There are two types of heterotopia: subependymal and subcortical. The most common clinical presentation is intractable seizures.[radiologyassistant.nl]

  • Focal Seizure

    Heterotopia present as nodular foci of grey matter intensity on all sequences. They do not enhance. Heterotopia Images of a typical subependymal heterotopia.[radiologyassistant.nl] The cerebral cortex is the only area from which epileptiform activity arises with any frequency.[dartmouth.edu] Schevon CA, Goodman RR, McKhann G, Emerson RG (2010) Propagation of epileptiform activity on a submillimeter scale. J Clin Neurophysiol 27: 406–411.[journals.plos.org]

  • Pachygyria-Mental Retardation-Seizures

    Heterotopia present as nodular foci of grey matter intensity on all sequences. They do not enhance. Heterotopia Images of a typical subependymal heterotopia.[radiologyassistant.nl] Depth electrode studies have demonstrated that epileptiform activity can originate directly from the heterotopic neurons with nearly constant simultaneous involvment of the[neuroscienceandgenetics.it] EEG disclosed interictal localized epileptiform activity in 8 patients and nonepileptiform activity with slow... more SUMMARY The nature, course and prognosis of seizures[scinapse.io]

  • Bilateral Temporo-Occipital Polymicrogyria

    Heterotopia present as nodular foci of grey matter intensity on all sequences. They do not enhance. Heterotopia Images of a typical subependymal heterotopia.[radiologyassistant.nl] Jacobs, Postsynaptic Currents Prior to Onset of Epileptiform Activity in Rat Microgyria, Journal of Neurophysiology, 98, 1, (178), (2007). Ingrid E.B.[doi.org] activity, maximum on photic stimulation Valproic acid Seizure free Siegel AM et al. 8 1 F Crampy periumbilical pain Occasional generalized seizures Few seconds Right parietal[ijponline.biomedcentral.com]

  • Flumazenil

    In seven patients, the increases in FMZ binding were periventricular, in locations normally seen in periventricular nodular heterotopia on MRI.[ncbi.nlm.nih.gov] activity, sometimes L sided emphasis Bilateral, start in L hemisphere L hemisphere NS NS R anterior and posterior, L central X16 37/M 24/13 300 1 day CBZ/VPA Blank stare,[dx.doi.org] There were frontal and parietal increases in FMZ binding in grey and white matter in the PLE group and decreases in the cingulate gyrus in the OLE group.[ncbi.nlm.nih.gov]

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