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12 Possible Causes for EEG Slowing, Focal Polymorphic Delta Slowing

  • Stroke

    Deep Belief Networks Based Brain Activity Classification Using EEG from Slow Cortical Potentials in Stroke.[dergipark.org.tr] In some cases, focal slow activity may presents as focal and irregular slow activity in the delta frequency, receiving the designation of polymorphic delta activity (PDA)[scielo.br] Abnormal EEG was found in 40 patients (58%) and was associated with higher age (p 0.021). The most common EEG pathology was focal slowing (30; 43.5%).[ncbi.nlm.nih.gov]

  • Migraine

    Abstract Acute confusional migraine (ACM) shows typical electroencephalography (EEG) patterns of diffuse delta slowing and frontal intermittent rhythmic delta activity (FIRDA[ncbi.nlm.nih.gov] EEG was normal at the beginning of visual aura.[ncbi.nlm.nih.gov] After 15minutes, posterior slow waves appeared over the migrainous hemisphere, spreading progressively towards anterior regions: first the central region (5minutes after onset[ncbi.nlm.nih.gov]

  • Traumatic Brain Injury

    We report on a patient with traumatic brain injury who showed motor recovery concurrent with recovery of injured corticofugal tracts (CFTs), diagnosed by diffusion tensor tractography (DTT). Four weeks after onset, when the patient started rehabilitation, he showed severe weakness of both upper and lower[…][ncbi.nlm.nih.gov]

  • Cerebral Hemorrhage

    Journal of Cerebral Blood Flow & Metabolism (2010) 30, 689–702; doi:10.1038/jcbfm.2009.282; published online 20 January 2010 Mast cells as early responders in the regulation of acute blood–brain barrier changes after cerebral ischemia and hemorrhage Perttu Johannes Lindsberg 1, 2, Daniel Strbian 1 and Marja-Liisa[…][web.archive.org]

  • Brain Neoplasm

    RATIONALE AND OBJECTIVES: To compare differences in diffusion tensor imaging (DTI) and dynamic susceptibility-weighted contrast-enhanced (DSC) magnetic resonance (MR) perfusion imaging characteristics of recurrent neoplasm and radiation necrosis in patients with brain tumors previously treated with radiotherapy[…][ncbi.nlm.nih.gov]

  • Malignant Glioma

    At present, there is no uniform consensus on the treatment of recurrent glioblastoma, especially the re-irradiation dose and temozolomide (TMZ) dose. The literature on the treatment of recurrent glioblastoma (GBM) by conventionally fractionated stereotactic radiotherapy (CFRT) is even rarer. A 44-year-old woman[…][ncbi.nlm.nih.gov]

  • Postictal State

    Answers Teaching Points Click Your Answer Below Postictal EEG may show attenuation Postictal EEG may show slowing Postictal focal attenuation/slowing on EEG does not have[statpearls.com] slowing ( 13 ).[doi.org] […] localizing value Postictal EEG may show both attenuation and slowing Would you like to access teaching points and more information on this topic?[statpearls.com]

  • Brain Abscess

    Unilateral slow waves (delta 1 to 3 sec) characterize the usual finding in cerebral abscess.[spinalmedicine.com] The findings on EEG may be localized and help excluding a more generalized, bilateral, intracranial disease, such as encephalitis.[spinalmedicine.com]

  • Continuous Spike-and-Slow-Waves during Sleep

    EEG slow wave synchronization during sleep seems to gate interictal epileptiform EEG phenomena.[semmelweis.hu] Herpes Simplex Virus (HSV) - Herpes Encephalitis Virus (HES) Focal slowing, Focal temporal delta, Lateralized polymorphic delta, Diffuse slowing, spiking, PLEDS.[studystack.com] EEG of a 16-yr-old child with MR and tonic seizures, showing slow spike wave activity superimposed on a slow BG. 22. EEG of an 11-yr-old pt with LGS showing GPFA. 23.[slideshare.net]

  • Anti-NMDA Receptor Encephalitis

    SIGNIFICANCE: Diffuse slowing was the most common presentation on the EEG in patients with anti-NMDAR encephalitis.[ncbi.nlm.nih.gov] The EEG then indicated excess beta activity, followed by the emergence of continuous slow activity, including generalised rhythmic delta activity and extreme delta brush,[ncbi.nlm.nih.gov] […] than slowness.[ncbi.nlm.nih.gov]

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