DOCTORS'
Medical Case Studies
DOCTORS'
Medical Case Studies
Visual evoked potential test
Evoked potential
An evoked potential (or "evoked response") is an electrical potential recorded from the nervous system of a human or other animal following presentation of a stimulus, as distinct from spontaneous potentials as detected by electroencephalography (EEG) or electromyography (EMG). Evoked potential amplitudes tend to be low, ranging from less than a microvolt to several microvolts, compared to tens of microvolts for EEG, millivolts for EMG, and often close to a volt for ECG. To resolve these low-amplitude potentials against the background of ongoing EEG, ECG, EMG and other biological signals and ambient noise, signal averaging is usually required...
Visual evoked potential test - List of case studies
- Multiple Sclerosis (MS)
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tests showed demyelinating damage to the auditory and visual pathway. Currently he has no functional or sensorial deficiencies. He ... to a previous MRI in January 2009 • Brainstem evoked response audiometry (BERA) test showing signs of demyelinating ...
- Multiple Sclerosis_1
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matter lesions, one of them contrast-enhancing. Sensory evoked potentials showed a bilateral increase in latency. Multiple sclerosis ... headaches at the end of December 2006 and subsequent visual defect until the appearance of double vision looking to the left. ...
- List of Examinations
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Assessment of the extramyramidal system Assessment of visual fields Audiogram Audiometric exam Audiometric examination Auditory brainstem response (ABR) Auditory evoked potential Auto-antibody asset Autoantibodies ...
- Multiple Sclerosis_2
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matter lesions, one of them contrast-enhancing. Sensory evoked potentials showed a bilateral increase in latency. Multiple sclerosis ... headaches at the end of December 2006 and subsequent visual defect until the appearance of double vision looking to the left. ...