NEUROLOGY

Visual Evoked Potentials in Infants and Children

Aug 29, 2019 by in NEUROLOGY Comments Off on Visual Evoked Potentials in Infants and Children

Visual evoked potentials (VEPs) are massed electrical signals generated by occipital cortical areas 17, 18, and 19 in response to visual stimulation. VEPs differ from the electroencephalogram (EEG) in that…

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Quantitative Electromyography

Aug 29, 2019 by in NEUROLOGY Comments Off on Quantitative Electromyography

The term quantitative electromyography (QEMG) refers to a number of different electrodiagnostic techniques and methods of gathering and analyzing data ( Table 12-1 ). No simple definition applies to all…

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H-Reflex and F-Response Studies

Aug 29, 2019 by in NEUROLOGY Comments Off on H-Reflex and F-Response Studies

H reflexes and F waves are commonly recorded electrophysiologic responses ( Figs. 18-1 , 18-2 , and 18-3 ). H reflexes are reflexes that are produced by afferent conduction in…

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Nerve Excitability: A Clinical Translation

Aug 29, 2019 by in NEUROLOGY Comments Off on Nerve Excitability: A Clinical Translation

Over the past 30 years there have been few significant changes to the neurophysiologic investigation of patients with suspected neuromuscular disorders. Motor and sensory nerve conduction studies, in combination with…

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Clinical Electromyography

Aug 29, 2019 by in NEUROLOGY Comments Off on Clinical Electromyography

The term electromyography refers to methods of studying the electrical activity of muscle. Over the years, such methods have come to be recognized as an invaluable aid to the diagnosis…

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Topographic Mapping, Frequency Analysis, and Other Quantitative Techniques in Electroencephalography

Aug 29, 2019 by in NEUROLOGY Comments Off on Topographic Mapping, Frequency Analysis, and Other Quantitative Techniques in Electroencephalography

Digital electroencephalography (EEG) is the simple recording and interpreting of routine EEG using computer-based technology. Quantitative electroencephalography (QEEG) is the processing of digital EEG with various algorithms and displays. There…

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