Reference-free identification of components of checkerboard-evoked multichannel potential fields

Electroencephalography and Clinical Neurophysiology
D Lehmann, W Skrandies


A method is proposed to determine components of evoked scalp potentials, in terms of times of occurrence (latency) and location on the scalp (topography). The scalp field distributions were evoked by checkerboard reversal and were recorded simultaneously in 47 channels. Component latencies are defined as times of maximal values of the electrical power of the evoked field (a measure of the amount of field relief); this measurement is independent of the choice of the reference electrode. In 10 subjects, two evoked components were found consistently: at 100 and at 140 msec. Plots of scalp locations of the extreme field values (i.e., reference-free data) at the occurrence times of the components showed occipitally positive and anteriorly negative extreme values at 100 msec, and vice versa at 140 msec. The occipital extreme values were surrounded by steep field gradients suggesting occipital generator processes. The polarity reversal of the evoked field distributions between 100 and 140 msec was a quick, jump-like location change of the extreme values in the field. The locations of the extreme field values were stable for long periods around peak times of the power curve. During these periods, the shape of the field remained constan...Continue Reading


Jan 1, 1977·Electroencephalography and Clinical Neurophysiology·G D GoffW R Goff
Feb 1, 1977·Electroencephalography and Clinical Neurophysiology·T AllisonW R Goff
Sep 1, 1978·IEEE Transactions on Bio-medical Engineering·R N KavanaghD H Fender
Nov 1, 1971·Electroencephalography and Clinical Neurophysiology·D Lehmann
Jun 1, 1968·Electroencephalography and Clinical Neurophysiology·D Lehmann, D H Fender
Jan 1, 1974·IEEE Transactions on Bio-medical Engineering·M Schneider
Jul 1, 1966·IEEE Transactions on Bio-medical Engineering·E Donchin

❮ Previous
Next ❯


Jan 1, 1997·Human Brain Mapping·A J PegnaC M Michel
Sep 29, 2000·Movement Disorders : Official Journal of the Movement Disorder Society·A HozumiK Yamazaki
Nov 1, 1990·Documenta Ophthalmologica. Advances in Ophthalmology·V SchippersC Teping
Jan 1, 1993·Brain Topography·W Skrandies
Jan 1, 1989·Brain Topography·P K Wong
Jan 1, 1989·Brain Topography·D Lehmann, C M Michel
Jan 1, 1990·Brain Topography·H L Hamburger, N I Triantafyllou
Jan 1, 1990·Brain Topography·W Skrandies
Jan 1, 1990·Brain Topography·D Lehmann
Jan 1, 1988·Brain Topography·W Skrandies
Jan 1, 1990·Brain Topography·R B ParanjapeJ Lind
Jan 1, 1994·Brain Topography·W Skrandies, M Fahle
Jan 1, 1995·Brain Topography·D BrandeisW Mingrone
Jan 1, 1996·Journal of Neural Transmission·W K StrikA Fallgatter
Jan 1, 1995·Journal of Neural Transmission. General Section·C M MichelD Lehmann
Jan 1, 1996·European Archives of Psychiatry and Clinical Neuroscience·K KochiD Lehmann
Jan 1, 1991·European Archives of Psychiatry and Clinical Neuroscience·K HirataD Lehmann
Sep 1, 1994·Medical & Biological Engineering & Computing·D FlotzingerW Mohl
Mar 3, 2007·Psychopharmacology·Masafumi YoshimuraThomas Dierks
May 1, 2008·Psychopharmacology·Lorena R R GianottiUrsula Schreiter-Gasser
Oct 14, 2004·Experimental Brain Research·Roberto CaldaraClaude-Alain Hauert
Jul 26, 2005·Experimental Brain Research·Leila S PetitChristoph M Michel
Jun 10, 2011·Experimental Brain Research·Suzanne E WelcomeMarc F Joanisse
May 31, 2012·Experimental Brain Research·Jeremy W MurphyEdmund C Lalor
Jan 13, 2005·European Archives of Psychiatry and Clinical Neuroscience·Ann-Christine EhlisAndreas J Fallgatter
Jun 26, 2007·Brain Topography·Hitoshi KatayamaDietrich Lehmann
Mar 19, 2008·Brain Topography·Micah M MurrayChristoph M Michel
May 1, 2009·Brain Topography·Curtis W PontonEdward T Auer
Apr 9, 2010·Brain Topography·Thomas Koenig, Lester Melie-García

❮ Previous
Next ❯

Related Concepts

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.


Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.


Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

© 2022 Meta ULC. All rights reserved