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| Local field potential | |
|---|---|
| Name | Local field potential |
| Specialty | Neuroscience |
Local field potential
Local field potential signals are extracellular voltage fluctuations recorded in brain tissue that reflect collective neuronal activity. They are studied by researchers at institutions like Harvard University, Max Planck Society, Massachusetts Institute of Technology, University College London, and California Institute of Technology and have been referenced in work from laboratories associated with figures such as György Buzsáki, Peter Latham, David McCormick, Nancy Kopell, and Edvard Moser. LFPs connect experimental paradigms used in projects at Allen Institute for Brain Science, Howard Hughes Medical Institute, European Molecular Biology Laboratory, and translational efforts at Mayo Clinic and Johns Hopkins Medicine.
LFPs are low-frequency components of extracellular recordings obtained with electrodes developed from technologies pioneered at Bell Labs and instrument platforms distributed by companies including NeuroNexus, Blackrock Microsystems, Intan Technologies, and MilliporeSigma. Historically, conceptual foundations trace to early neurophysiological studies from laboratories led by Santiago Ramón y Cajal, Camillo Golgi, Ramon y Cajal's contemporaries, and institutional programs at University of Oxford and University of Cambridge. Physiologically, LFPs arise from synchronized post-synaptic currents in cortical columns such as those characterized by researchers at Weill Cornell Medicine and Columbia University and are interpreted within frameworks advanced by theorists from Princeton University and Stanford University.
Recording approaches employ electrode arrays influenced by engineering from Massachusetts Institute of Technology, Stanford University, University of California, San Diego, and instrumentation validated at National Institutes of Health. Multisite laminar probes, neuropixels arrays, and tetrodes from manufacturers like NeuroNexus and innovations at Max Planck Institute are used alongside preprocessing pipelines developed in labs at New York University and University of Pennsylvania. Signal processing pipelines draw on methods from groups at Carnegie Mellon University, Brown University, University of Michigan, and ETH Zurich using filtering, artifact rejection, independent component analysis, and spectral estimation approaches informed by statistical work at Columbia University and Imperial College London.
Biophysical origins of LFPs involve postsynaptic potentials on pyramidal neurons documented in studies at University of California, Berkeley and interneuron networks examined by teams at Massachusetts General Hospital and Yale University. The role of glial contributions and ephaptic interactions has been explored at Max Planck Institute for Brain Research and University of Zurich. Experimental perturbations performed in laboratories at Cold Spring Harbor Laboratory and Salk Institute use optogenetic tools developed at Zuckerman Institute and viral vectors characterized at Addgene to dissect contributions from excitatory cells studied by researchers at University of Chicago and inhibitory cells studied at Duke University.
Spatial reach and decay of LFPs have been measured in cortical layers mapped by teams at Beth Israel Deaconess Medical Center and in hippocampal laminae by groups at New York University School of Medicine and University of California, Los Angeles. Temporal dynamics encompassing oscillations such as delta, theta, alpha, beta, gamma and high-frequency oscillations have been analyzed in studies from Columbia University Medical Center, National Institute of Mental Health, University of Amsterdam, and University of Toronto. Studies combining imaging from Broad Institute collaborations and electrophysiology from Scripps Research and Florida State University have linked spatiotemporal LFP patterns to circuit motifs described by investigators at Friedrich Miescher Institute and Weizmann Institute of Science.
Functional interpretations relate LFP features to sensory processing experiments performed at Princeton Neuroscience Institute, motor cortex studies at University of California, San Francisco, and memory investigations at University of Pennsylvania Perelman School of Medicine. Correlations between LFPs and behavior have been explored in primate centers at National Primate Research Center and human neurosurgical studies at Cleveland Clinic and Massachusetts General Hospital. Theoretical models linking LFPs to population codes have been proposed by groups at University of Cambridge, École Normale Supérieure, California Institute of Technology, and New York University.
LFPs are used in brain–machine interface development at Brown University and University of Utah, in epilepsy monitoring at Mayo Clinic and Cleveland Clinic Foundation, and in deep brain stimulation planning informed by work at University of Toronto and University of Oxford. Clinical trials coordinated by teams at National Institute of Neurological Disorders and Stroke and rehabilitation programs at RehabHub use LFP biomarkers identified in studies from Johns Hopkins University School of Medicine and Vanderbilt University Medical Center. Drug effects on LFP patterns are profiled in pharmacology labs at Novartis partnerships and academic studies from University of California, Davis.
Controversies include interpretation of volume conduction debated by investigators at University of Maryland, inverse problem ambiguities discussed in seminars at Massachusetts Institute of Technology and Imperial College London, and reproducibility concerns highlighted in consortiums including the Allen Institute for Brain Science and initiatives at Human Brain Project. Debates over source localization accuracy involve contributors from Max Planck Society, ETH Zurich, and University College London while ethical and translational questions appear in policy forums at World Health Organization and National Academy of Sciences.