Results 11 to 20 of about 2,308,764 (360)

Modeling extracellular field potentials and the frequency-filtering properties of extracellular space [PDF]

Biophysics Journal 86 (2004) 1829-1842, 2003
Extracellular local field potentials (LFP) are usually modeled as arising from a set of current sources embedded in a homogeneous extracellular medium. Although this formalism can successfully model several properties of LFPs, it does not account for their frequency-dependent attenuation with distance, a property essential to correctly model ...
Alain Destexhe, Amzica, Basser, Braitenberg, Bremer, Bremer, Claude Bédard, Creutzfeldt, Creutzfeldt, Destexhe, Destexhe, Destexhe, Eccles, Helmut Kröger, Hille, Hines, Hodgkin, Johnston, Klee, Klee, Koch, Koch, Miller, Nunez, Peters, Press, Protopapas, Rall, Ranck   +28 more
arxiv   +6 more sources

Generalized cable formalism to calculate the magnetic field of single neurons and neuronal populations [PDF]

Physical Review E 90: 042723 (2014), 2014
Neurons generate magnetic fields which can be recorded with macroscopic techniques such as magneto-encephalography. The theory that accounts for the genesis of neuronal magnetic fields involves dendritic cable structures in homogeneous resistive extracellular media.
Bedard, Claude, Destexhe, Alain
arxiv   +3 more sources

Dynamic Moment Analysis of the Extracellular Electric Field of a Biologically Realistic Spiking Neuron [PDF]

arXiv, 2007
Based upon the membrane currents generated by an action potential in a biologically realistic model of a pyramidal, hippocampal cell within rat CA1, we perform a moment expansion of the extracellular field potential. We decompose the potential into both inverse and classical moments and show that this method is a rapid and efficient way to calculate ...
Koch, Christof, Milstein, J. N.
arxiv   +6 more sources

Global existence results for complex hyperbolic models of bacterial chemotaxis [PDF]

arXiv, 2006
Bacteria are able to respond to environmental signals by changing their rules of movement. When we take into account chemical signals in the environment, this behaviour is often called chemotaxis. At the individual-level, chemotaxis consists of several steps. First, the cell detects the extracellular signal using receptors on its membrane.
Erban, Radek, Hwang, Hyung Ju
arxiv   +4 more sources

Extracellular mechanotransduction [PDF]

Journal of General Physiology, 2022
We highlight the force-sensing function of extracellular matrix and present a complementary mechanotransduction paradigm.
Haller, Stephen J., Dudley, Andrew T.
openaire   +2 more sources

Extracellular Vesicles as Regulators of the Extracellular Matrix

Bioengineering, 2023
Extracellular vesicles (EVs) are small membrane-bound vesicles secreted into the extracellular space by all cell types. EVs transfer their cargo which includes nucleic acids, proteins, and lipids to facilitate cell-to-cell communication. As EVs are released and move from parent to recipient cell, EVs interact with the extracellular matrix (ECM) which ...
Neil J. Patel, Anisa Ashraf, Eun Ji Chung   +2 more
openaire   +3 more sources

Fragmentation of extracellular ribosomes and tRNAs shapes the extracellular RNAome [PDF]

Nucleic Acids Research, 2020
Abstract A major proportion of extracellular RNAs (exRNAs) do not copurify with extracellular vesicles (EVs) and remain in ultracentrifugation supernatants of cell-conditioned medium or mammalian blood serum. However, little is known about exRNAs beyond EVs. We have previously shown that the composition of the nonvesicular exRNA fraction
Bruno Costa, Bruno Costa, Mercedes Segovia, Tania Possi, Pavel Ivanov, Pavel Ivanov, Pavel Ivanov, Alfonso Cayota, Alfonso Cayota, Fabiana Gámbaro, Fabiana Gámbaro, Pablo Fagúndez, Pablo Fagúndez, Mauricio Castellano, Mauricio Castellano, Juan Pablo Tosar, Yasutoshi Akiyama, Yasutoshi Akiyama, Marcelo Hill, Alvaro Olivera   +19 more
openaire   +4 more sources

SnapShot: Extracellular Vesicles [PDF]

Cell, 2020
Cells release a variety of extracellular vesicles (EVs; including exosomes, microvesicles, and many others) into their environment. EVs can bud in endosomes or directly at the plasma membrane, carrying a selection of components from the cell and displaying various functional properties.
Federico Cocozza, Federico Cocozza, Lorena Martin-Jaular, Eleonora Grisard, Clotilde Théry, Mathilde Mathieu, Mathilde Mathieu   +6 more
openaire   +3 more sources

Extracellular matrix [PDF]

FEBS Letters, 1990
A succinct overview of recent results on the biochemistry of extracellular matrix (ECM) is presented. The rapid expansion of this discipline over the best decades renders impossible to give an even approximately complete coverage of matrix biology. Some selected results concerning the four major families of macromolecules composing the ECM, that is ...
Labat-Robert, J., Bihari-Varga, M., Robert, L.   +2 more
openaire   +2 more sources

Extracellular signals regulate the biogenesis of extracellular vesicles

Biological Research, 2022
AbstractExtracellular vesicles (EVs) are naturally released membrane vesicles that act as carriers of proteins and RNAs for intercellular communication. With various biomolecules and specific ligands, EV has represented a novel form of information transfer, which possesses extremely outstanding efficiency and specificity compared to the classical ...
Yong Jin, Lele Ma, Wanying Zhang, Wen Yang, Qiyu Feng, Hongyang Wang   +5 more
openaire   +3 more sources