Average Evoked Potentials

Methods, results, and evaluation of research in average evoked potentials.

The Third Edition of this reliable reference could easily serve as a single resource for the clinical neurophysiologist performing evoked potentials in clinical practice. Coverage includes new clinical applications for evoked potential (EP) tests, advanced test variations such as motor and cognitive EPs, and new techniques that improve the efficiency of testing. Step-by-step instruction is provided on methodology and interpretation for each major test -- pattern-shift visual, brainstem auditory, and short-latency somatosensory. New to this edition is a section on evoked potential monitoring in the operating room. The renowned authors describe new techniques for eliminating artifact and improving the averaging process; and explain important techniques such as pattern electroretinography and registration of peripheral nerve action potentials. Compatibility: BlackBerry(R) OS 4.1 or Higher / iPhone/iPod Touch 2.0 or Higher /Palm OS 3.5 or higher / Palm Pre Classic / Symbian S60, 3rd edition (Nokia) / Windows Mobile(TM) Pocket PC (all versions) / Windows Mobile Smartphone / Windows 98SE/2000/ME/XP/Vista/Tablet PC

Evoked potentials are potentials that are derived from the peripheral or central nervous system. They are time locked with an external stimulus and can be influenced by subjective intentions. Evoked potentials have become increasingly popular for clinical diagnosis over the last few years. Evoked potentials from the visual system are used by ophthalmologists in order to localize the abnormalities in the visual pathway. The otologists are mainly involved in brainstem auditory evoked potentials, while the pediatricians, neonatologists, neurologists and clinical neurophysiologists make use of multimodal stimulation. The psychiatrists and psychologists, generally, examine the slow potentials such as P300 and CNV. Anesthesiologists use short latency somatosensory and visual evoked potentials in order to monitor the effectiveness of the anesthesia. Pharmaco evoked potentials are very promising measures for the quan tification of the effectiveness of drug action on the cerebral cortex. Urologists are more and more involved in pudendal somatosensory evoked potentials and in the intensive care unit evoked potentials are used in order to monitor the functional state of the central nervous system of the patient. This overwhelming number of examinations and exam ina tors clearly demonstrates the need for guidelines and standardization of the methods used. The evoked potential metholody is restricted by the relative poor signal to noise ratio. In many diseases this signal to noise ratio decrease rapidly during the progression of the illness. Optimal technical equipment and methodology are therefore essential.