Results 61 to 70 of about 295,453 (235)

Correlates of Spreading Depolarization, Spreading Depression, and Negative Ultraslow Potential in Epidural Versus Subdural Electrocorticography

Frontiers in Neuroscience, 2019
Spreading depolarizations (SDs) are characterized by near-complete breakdown of the transmembrane ion gradients, neuronal oedema and activity loss (=depression).
Jens P. Dreier, Jens P. Dreier, Jens P. Dreier, Jens P. Dreier, Jens P. Dreier, Sebastian Major, Sebastian Major, Sebastian Major, Coline L. Lemale, Coline L. Lemale, Coline L. Lemale, Vasilis Kola, Clemens Reiffurth, Clemens Reiffurth, Karl Schoknecht, Karl Schoknecht, Karl Schoknecht, Nils Hecht, Nils Hecht, Jed A. Hartings, Jed A. Hartings, Johannes Woitzik, Johannes Woitzik   +22 more
doaj   +1 more source

A Geometrically Transient Platform for Bioelectronic Implants

Advanced Materials, EarlyView.
Minimally invasive bioelectronic implants often compromise performance for smaller sizes. To resolve this optimization dilemma, a wireless bioelectronic implant with a transient geometry is introduced (MiFi). The origami‐inspired device miniaturizes up to sixfold for syringe insertion and autonomously unfolds post‐implantation.
Selin Olenik, John D. Goodwin, Atharv Naik, Philip Coatsworth, Ioi Chit Cheung, Farbod Amirghasemi, Anies Sohi, Ehsan Abedi, Tayeb Tadlaoui, Maral P. S. Mousavi, Andriy S. Kozlov, Victoria Salem, Andrew S. Cowburn, Firat Guder   +13 more
wiley   +1 more source

Temporo-spectral imaging of intrinsic optical signals during hypoxia-induced spreading depression-like depolarization. [PDF]

PLoS ONE, 2012
Spreading depression (SD) is characterized by a sustained near-complete depolarization of neurons, a massive depolarization of glia, and a negative deflection of the extracellular DC potential.
Maria Mané, Michael Müller
doaj   +1 more source

A Multifunctional Ionograsper Enabling Ion‐Redistribution Proximity Sensing and Structural‐Reconfiguration‐Driven Bidirectional Actuation

Advanced Materials, EarlyView.
A solid‐state ionic actuator integrates sensing, actuation, and memory within one material. A brief UV pulse induces long‐lasting deformation via coupled network rearrangement, dehydration, and rehydration, while ionic redistribution enables self‐powered sensing, supporting multifunctional, energy‐efficient soft robotic functions without continuous ...
Yong Min Kim, Jin Han Kwon, Hyeon Woo Yang, Sungryong Kim, Gyeong Rok Lee, Hong Chul Moon   +5 more
wiley   +1 more source

Microfluidic Droplet Plate Preserving Single Human Induced Pluripotent Stem Cell‐Derived Cardiomyocytes Morphology and Function

Advanced Materials Technologies, EarlyView.
We introduce a novel method combining microfluidics, optogenetics, and human induced pluripotent stem cell (iPSC) technology to encapsulate single iPSC‐derived cardiomyocytes (iPSC‐CMs) in an optimal environment for functional characterization. This method enables direct genotype‐phenotype correlation for genetic studies and high‐throughput screening ...
Xiao‐Ting Wang, Rachel P. White, Yashasvi Tharani, Michael A. Finocchiaro, Leona M. Ripple, Maksymilian Prondzynski, Tania Konry, Vassilios J. Bezzerides   +7 more
wiley   +1 more source

Quantifying the relationship between spreading depolarization and perivascular cerebrospinal fluid flow

Scientific Reports, 2023
Recent studies have linked spreading depolarization (SD, an electro-chemical wave in the brain following stroke, migraine, traumatic brain injury, and more) with increase in cerebrospinal fluid (CSF) flow through the perivascular spaces (PVSs, annular ...
Saikat Mukherjee, Mahsa Mirzaee, Jeffrey Tithof   +2 more
doaj   +1 more source

Dielectric Permittivity Tensor of Muscovite for Next Generation All Van Der Waals Broadband Photonic Components

Advanced Optical Materials, EarlyView.
Low‐index and low‐loss vdW muscovite represents an emerging robust dielectric platform for the creation of next‐generation all‐vdW nanophotonic architectures. Its utilization as a low‐index building‐block in all‐vdW multilayers enables extreme optical contrast when paired with MoS2, paving the way to the realization of few‐layer ultrathin DBS ...
Meri H. Hayrapetyan, Maksim L. Sargsyan, Davit A. Karakhanyan, Ani P. Khachatryan, Maria A. Levonyan, Dmitrii Litvinov, Maciej Koperski, Artsruni V. Margaryan, Makars Šiškins, Konstantin S. Novoselov, Davit A. Ghazaryan   +10 more
wiley   +1 more source

Spreading depolarization, Tsunami im Hirn

, 2009
Zusammenfassung Spreading depolarization (SD) beschreibt eine neuronale und astrozytäre Massendepolarisationswelle der grauen Substanz.
Jens P. Dreier
core   +1 more source

Quantitative Analysis Ageing Status of Natural Ester-paper Insulation and Mineral Oil-paper Insulation by Polarization/Depolarization Current

, 2012
Polarization and Depolarization Current (PDC) technique is an effective tool to assess the condition of oil-paper insulation system in power transformers. So far the PDC behaviors of mineral oil-paper insulation have been widely investigated.
Yang, Lijun, Hao, Jian, Liao, Ruijin, Ma, Zhiqin, Chen, George   +4 more
core   +1 more source

Astrocytes as critical players of the fine balance between inhibition and excitation in the brain: spreading depolarization as a mechanism to curb epileptic activity

Frontiers in Network Physiology
Spreading depolarizations (SD) are slow waves of complete depolarization of brain tissue followed by neuronal silencing that may play a role in seizure termination. Even though SD was first discovered in the context of epilepsy research, the link between
Rune Enger, Kjell Heuser
doaj   +1 more source