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ElectroencephalogramAka: EEG
- Background
- Measures electrical activity of cerebral cortex
- Measures gray matter function (neuronal function)
- Normal in white matter disease
- Seizure Disorder findings
- Indications
- Seizure Diagnosis
- Anticonvulsant weaning
- Seizure free for 2 years and
- Normal EEG
- Non-Seizure Times
- Abnormal in 70% of Seizure patients
- During Seizure
- Massive electrical discharge
- Post-ictal
- Slowing of EEG
- Medications that do not affect EEG
- Anticonvulsants
- Medications that cause Beta (fast wave patterns)
- Barbiturates
- Benzodiazepines
- Cerebrovascular Accident (CVA) assessment
- Cortical CVA (large vessel disease)
- Abnormal EEG
- Subcortical or brainstem CVA (small vessels disease)
- Normal EEG
- Metabolic encephalopathy
- Non-focal slowing of EEG
- Rhythmic bursts of symmetrical frontal slowing
- Specific patterns may assist with etiology
- Hepatic Encephalopathy: Triphasic waves
Electroencephalography (C0013819)
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| Definition (MSH) | Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. |
| Definition (CSP) | recording of electric currents developed in the brain, by means of electrodes applied to the scalp or the brain. |
| Definition (NCI) | The neurophysiologic exploration of the electrical activity of the brain by the application of electrodes to the scalp. The resulting traces are known as an electroencephalogram (EEG). This test is used to assess brain damage, epilepsy and other problems. |
| Concepts | Diagnostic Procedure (T060)
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| ICD9 | 89.14 |
| English | EEG, ELECTROENCEPHALOGR, Electroencephalogram, Electroencephalography |
| Spanish | electroencefalograma |
| Credits | Derived from the NIH UMLS (Unified Medical Language System)
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