Evoked potentials (EPs) have been used for several decades to assess neurologic function intraoperatively and in outpatient studies. Although the clinical emphasis has changed over time with advances in imaging technology, EPs remain a procedure performed by nearly all neurophysiology laboratories. Illustrated Manual of Clinical Evoked Potentials is a modern, practical guide to performing these studies and interpreting the results. The book opens with an introductory chapter on the basic principles of EPs, followed by in-depth discussion of each clinical modality including Visual Evoked Potentials (VEP), Brainstem Auditory Evoked Potentials (BAEP) and Somatosensory Evoked Potentials (SEP). A concluding chapter devoted to Neurophysiologic Intraoperative Monitoring is intended to hone skills in performing baseline EPs and evaluating tracings for this important application. Within each chapter technical aspects of conducting studies, obtaining tracings, identifying waveforms, and normative data are reviewed. Detailed presentations of clinical findings, amplified by numerous examples of EP tracings and brief text with salient interpretive points are provided for all applications.
Author(s): Aatif Husain
Publisher: Demos Medical
Year: 2015
Language: English
Pages: 300
City: New York
Cover
Title
Copyright
Contents
Preface
Share Illustrated Manual of Clinical Evoked Potentials
Chapter 1: Basics of Evoked Potentials
Types of Evoked Potentials
Modalities
Nomenclature
Waveform Generators
Stimulation Methodology
Electrodes
Parameters
Recording Methodology
Electrodes
Amplifiers
Interpretation
Peak Identification
Latency
Amplitude
Other Measurements
Variability
Normal Evoked Potentials
Abnormal Evoked Potentials
Report
Conclusions
References
Chapter 2: Visual Evoked Potentials
Classification
Anatomy
Methodology
Patient Variables
Stimulus Parameters
Recording Parameters
Interpretation
Expected Waveforms
Parameters Measured
Abnormalities
Hemifield VEP
Indications
Interpretation
Flash VEP
Methodology
Interpretation
Pediatric Considerations
Maturational Issues
Methodology
Interpretation
Clinical Correlates
Prechiasmatic Disorders
Chiasmatic Disorders
Postchiasmatic Disorders
Ophthalmologic Disorders
Examples
Conclusions
References
Chapter 3: Brainstem Auditory Evoked Potentials
Classification
Anatomy
Methodology
Patient Variables
Stimulation Parameters
Recording Parameters
Interpretation
Expected Waveforms
Parameters Measured
Abnormalities
Pediatric Considerations
Maturational Issues
Methodology
Interpretation
Behavioral Audiogram
Latency/Intensity Series
Clinical Correlates
Multiple Sclerosis
Dysmyelinating Conditions
Cerebellopontine Angle Tumors
Other Brainstem Tumors and Lesions
Coma
Newborn Hearing Screening
Neurophysiologic Intraoperative Monitoring
Examples
Conclusions
References
Chapter 4: Somatosensory Evoked Potentials
Classification
Anatomy
Methodology
Patient Variables
Stimulation Parameters
Recording Parameters
Interpretation
Expected Waveforms
Parameters Measured
Abnormalities
Pediatric Considerations
Maturational Issues
Methodology
Interpretation
Clinical Correlates
Multiple Sclerosis
Transverse Myelitis
Brainstem Lesions
Neurodegenerative Diseases
Peripheral Neuropathies
Leukodystrophies
Coma
Examples
Conclusions
References
Chapter 5: Evoked Potentials During Surgery
Brainstem Auditory Evoked Potentials
Anatomy and Physiology
Methodology
Anesthetic Considerations
Warning Criteria
Mechanisms of Waveform Change
Clinical Applications
Examples
Somatosensory Evoked Potentials
Anatomy and Physiology
Methodology
Anesthetic Considerations
Warning Criteria
Mechanisms of Waveform Change
Clinical Applications
Examples
Motor Evoked Potentials
Anatomy and Physiology
Methodology
Anesthetic Considerations
Warning Criteria
Mechanisms of Waveform Change
Safety
Clinical Applications
Examples
Conclusions
References
Index
