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| 4005121265 | Hypoglycemia | EEG shows prominent slowing with frequent diffuse discharges | 0 | |
| 4005142448 | Hyperglycemia (nonketonic) | EEG often has diffuse slowing with focal spike discharges | 1 | |
| 4005145907 | Hepatic Encephalopathy | EEG shows prominent diffuse slowing with frequent triphasic discharges. Triphasics show a phase lag from anterior to posterier head regions. Actual seizures are uncommon. | 2 | |
| 4005158943 | Uremic Encephalopathy (acute) | EEG often shows diffuse slowing with diffuse spikes and/or triphasic waves | 3 | |
| 4005159958 | Uremic Encephalopathy (chronic) | EEG may have diffuse slowing and often has diffuse spikes. Does have a photoparoxysmal response. | 4 | |
| 4005163789 | Hypocalcemia | EEG shows prominent diffuse slowing with diffuse spikes | 5 | |
| 4005169936 | Hypercalcemia | EEG often shows diffuse slowing and no discharges | 6 | |
| 4005172024 | Hyponatremic | Low sodium; EEG shows prominent diffuse slowing, may have discharges | 7 | |
| 4005177691 | Vitamin B6 deficiency | EEG may have diffuse slowing and frequent diffuse spikes | 8 | |
| 4005180019 | Wernicke-Korsakoff Encephalopathy | EEG often has diffuse slowing and no discharges | 9 | |
| 4005181480 | Vitamin B12 deficiency | EEG shows prominent diffuse slowing with diffuse or focal spikes | 10 | |
| 4005183588 | Addison's Disease | EEG often has diffuse slowing and no discharges | 11 | |
| 4005190847 | Adrenocortical Hyperfunction | EEG shows increase of fast activity and no discharges | 12 | |
| 4005195260 | Sheehan's Syndrome | EEG often shows diffuse slowing and no discharges | 13 | |
| 4005200745 | Hyperthyroidism | EEG shows increase in fast activity and often has discharges | 14 | |
| 4005207965 | Thyrotoxicosis | EEG shows increased fast activity and often has diffuse triphasic waves | 15 | |
| 4005215952 | Hypothyroidism | EEG often has diffuse slowing and diffuse spikes | 16 | |
| 4005219938 | Acute Porphyria | EEG often has diffuse or focal slowing and spikes | 17 | |
| 4005230011 | Tay-Sachs disease | EEG often has diffuse slowing and frequent diffuse spikes and myoclonus | 18 | |
| 4005241351 | Cherry Red Spot Myoclonus Syndrome | EEG may have diffuse slowing and frequent positive spikes at the vertex, and myoclonus | 19 | |
| 4005259178 | Gaucher's Disease | EEG may have diffuse slowing and frequent diffuse discharges. Has a photoparoxysmal response | 20 | |
| 4005266951 | Krabbe's Disease | EEG often has diffuse slowing, discharges and hypsarrhythmia | 21 | |
| 4005280687 | Metachromatic Leukodystrophy | EEG may have diffuse slowing and no discharges | 22 | |
| 4005302360 | Adrenoleukodystrophy | EEG often has diffuse slowing and no discharges | 23 | |
| 4005311921 | Zellweger's Syndrome | EEG often has diffuse slowing and discharges with spikes | 24 | |
| 4005333696 | MELAS Syndrome | EEG often has diffuse slowing and frontal discharges with spikes and PLEDS | 25 | |
| 4005347596 | MERRF Syndrome | EEG may have diffuse slowing and often has diffuse discharges | 26 | |
| 4005357599 | PKU (phenylketonuria) | EEG often has diffuse slowing with diffuse discharges and hypsarrhythmia | 27 | |
| 4005368013 | Batten's Disease | EEG shows prominent diffuse slowing with frequent discharges, spikes brought out by low-frequency photic stimulation. | 28 | |
| 4005380889 | Hallervorden-Spatz Disease | EEG often has diffuse slowing with focal or diffuse discharges, delta and theta activity and spikes | 29 | |
| 4005386803 | Seitelberger's Disease | EEG shows fast activity and may have diffuse discharges of theta and delta activity | 30 | |
| 4005399649 | Wilson's Disease | EEG often has diffuse slowing and may have diffuse delta/theta activity and sharp waves | 31 | |
| 4005407518 | Menke's Disease | EEG often shows diffuse slowing and focal discharges, spikes and hypsarrhythmia | 32 | |
| 4005416528 | Tourette's Syndrome | EEG may show diffuse slowing and may have diffuse or focal discharges and central spikes | 33 | |
| 4005420790 | Lafora Disease | EEG often shows diffuse slowing and frequent diffuse or focal discharges, spikes, photoparoxysmal response, and myoclonus | 34 | |
| 4005429233 | Baltic Myoclonic Epilepsy | EEG often shows diffuse slowing and frequent diffuse discharges, photoparoxysmal response; the myoclonic seizures are irregular and asynchronus | 35 | |
| 4005442684 | Alper's Disease | Begins in childhood and is often complicated by serious liver disease, symptoms include spasticity, seizures, and loss of cognitive ability; EEG may show slowing and frequent focal or diffuse discharges | 36 | |
| 4005448384 | Tuberous Sclerosis | EEG often shows diffuse or focal slowing and frequent focal or diffuse discharges, and hypsarrhythmia | 37 | |
| 4005453607 | Sturge-Weber Syndrome | EEG often shows focal slowing and focal discharges, spikes, hypsarrhythmia, and sleep spindles can be either depressed or accentuated | 38 | |
| 4005463927 | Down's Syndrome | EEG may show slowing and may have discharges | 39 | |
| 4005467843 | Leber's Disease | EEG may show slowing and no discharges | 40 | |
| 4005473412 | Myotonic Dystrophy | Begins in adults with progressive muscle wasting and weakness, often have prolonged muscle contractions and cannot relax muscle after using them; EEG often shows diffuse slowing and no discharges | 41 | |
| 4005478794 | Congenital Muscular Dystrophy (Fukuyama type) | EEG often shows diffuse slowing with diffuse discharges | 42 | |
| 4005501861 | Angelman Syndrome | EEG shows prominent diffuse slowing and often has diffuse discharges and spikes | 43 | |
| 4005519226 | Rett Syndrome | EEG often shows diffuse slowing with frequent focal discharges with spikes, central spikes, and Lennox-Gastaut Syndrome | 44 | |
| 4005567297 | Acute Purulent Meningitis | Inflammation of the meninges; EEG shows prominent diffuse slowing and often has diffuse discharges | 45 | |
| 4005584853 | Infectious Mononucleosis | EEG often shows diffuse slowing and may have discharges | 46 | |
| 4005587084 | Aseptic Meningitis | EEG may show slowing and no discharges | 47 | |
| 4005591791 | Encephalitis | EEG shows prominent diffuse slowing and often has diffuse discharges | 48 | |
| 4005595942 | Herpes Encephalitis | EEG shows prominent focal slowing with focal discharges and PLEDS | 49 | |
| 4005601350 | Rasmussen's Encephalitis | EEG often shows focal slowing with frequent focal discharges | 50 | |
| 4005606774 | Congenital Rubella Encephalitis | EEG shows prominent diffuse slowing and often has diffuse discharges | 51 | |
| 4005614143 | Progressive Rubella Panencephalitis | EEG often shows diffuse slowing with diffuse periodic discharges and myoclonus | 52 | |
| 4005618293 | Congenital Cytomegalovirus Disease | EEG often shows diffuse or focal slowing and discharges are usually not present | 53 | |
| 4005625559 | West Nile Virus | EEG often shows diffuse slowing with no discharges | 54 | |
| 4005636181 | Rabies | EEG often shows diffuse slowing with no discharges | 55 | |
| 4005637086 | Rickettsial Infections | EEG often shows diffuse or focal slowing with diffuse or focal discharges | 56 | |
| 4005641625 | Lyme Disease | EEG often shows diffuse slowing with no discharges | 57 | |
| 4005645608 | Fungal Disease | EEG often shows diffuse or focal slowing with no discharges | 58 | |
| 4005646342 | AIDS | EEG often shows diffuse or focal slowing with diffuse discharges | 59 | |
| 4005647433 | Cysticercosis | EEG often shows diffuse or focal slowing with focal discharges | 60 | |
| 4005651817 | Echinococcosis | EEG often shows diffuse or focal slowing with diffuse discharges | 61 | |
| 4005656380 | Toxoplasmosis | EEG often shows diffuse slowing with diffuse discharges and hypsarrhythmia | 62 | |
| 4005659729 | African Trypanosomiasis (Sleeping Sickness) | EEG often shows diffuse slowing with diffuse discharges | 63 | |
| 4005662726 | Malaria | EEG often shows diffuse slowing and may have discharges | 64 | |
| 4005664752 | Sydenham's Chorea | EEG often shows diffuse slowing and may have discharges | 65 | |
| 4005669705 | Neuro-Bechets Disease (Uveomeningitis) | EEG often shows diffuse slowing and diffuse discharges | 66 | |
| 4005670975 | Neurosyphilis | EEG often shows diffuse or focal slowing with focal discharges | 67 | |
| 4005672146 | Hemiconvulsions, Hemiplegia, and Epilepsy (HHE Syndrome) | EEG often shows focal slowing with focal discharges, spikes, and spike and wave | 68 | |
| 4005672894 | Brain Abscess | EEG hows prominent diffuse and/or focal slowing and often has diffuse and/or focal discharges, PLEDS | 69 | |
| 4005697001 | Alzheimer's Disease | EEG often shows diffuse slowing and my have (posteriorly dominate) triphasic discharges. | 70 | |
| 4005698102 | Pick's Disease (frontotemporal dementia) | EEG shows no slowing and no discharges | 71 | |
| 4005698482 | Parkinson's Disease | EEG often has diffuse slowing with no discharges | 72 | |
| 4005699894 | Progressive Supranuclear Palsy | EEG may have diffuse slowing and often has discharges and FIRDA | 73 | |
| 4005702279 | Dementia with Lewy Bodies | EEG often shows diffuse slowing and discharges, FIRDA | 74 | |
| 4005702833 | Huntington's chorea | EEG may show low voltage and no discharges. HV does not help to bring out alpha as it would in normal patients | 75 | |
| 4005704235 | Normal Pressure Hydrocephalus | EEG may have diffuse slowing and often shows diffuse slow wave bursts | 76 | |
| 4005704642 | Depression | EEG does not usually have any slowing nor discharges | 77 | |
| 4005705646 | Creutzfeld-Jakob Disease (CJD) | EEG shows prominent diffuse slowing with frequent diffuse periodic triphasic waves. Myoclonic jerks are NOT time locked with the discharges | 78 | |
| 4005724743 | Multiple Sclerosis | EEG may show diffuse or focal slowing and may have diffuse or focal discharges | 79 | |
| 4005725654 | Reye's syndrome | EEG shows prominent diffuse slowing and often has discharges of 14-16 Hz positive spikes. | 80 | |
| 4005726924 | Subacute Sclerosing Panencephalitis (SSPE) | EEG often shows slowing and frequent diffuse periodic high-amplitude burst discharges. If myoclonic jerks are present they ARE time locked with the bursts. In later stages of the disease FIRDA and various epileptiform activity may appear | 81 | |
| 4005738948 | Aicardi's Syndrome | EEG shows totally synchronous sleep spindles and hypsarrythmia | 82 | |
| 4005741800 | Moyamoya Disease | EEG shows "rebuild up" of delta bursts about 3-5 mins after HV | 83 | |
| 4005747974 | Infantile Spasms (West Syndrome) | EEG shows hypsarrythmia (which disappears by age 5), common ictal pattern is sudden cessation of paroxysmal activity, replaced by low-voltage fast activity. Nearly 90% of patients remain disabled by epilepsy or other deficits including severe mental impairment. ACTH is used to treat. | 84 | |
| 4005753632 | Juvenile Myoclonic Epilepsy (JME) | EEG shows interictal patterns of generalized polyspike and polyspike-wave with frontocentral predominance, background is usually normal, HV may activate epileptiform, and 30-40% of patients have photoparoxysmal seizures | 85 | |
| 4005760126 | Lennox-Gastaut Syndrome | SSW consists of biphasic or triphasic sharp/spike waves followed by high-voltage slow waves that are slower and more irregular than 3Hz spike-wave complexes, bursts are usually bilaterally synchronous, background is slow in more than 70% of patients, in sleep the SSW become polyspike-waves | 86 |
