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New implantable tool images brain activity in 3D

New implantable tool images brain activity in 3D
Tools that allow neuroscientists to record and quantify functional activity within the living brain are in great demand. Traditionally, researchers have used techniques such as functional magnetic resonance imaging, but this method cannot record neural activity with high spatial resolution or in moving subjects.
In recent years, a technology called optogenetics has shown considerable success in recording neural activity from animals in real time with single neuron resolution. Optogenetic tools use light to control neurons and record signals in tissues that are genetically modified to express light-sensitive and fluorescent proteins. However, existing technologies for imaging light signals from the brain have drawbacks in their size, imaging speed, or contrast that limit their applications in experimental neuroscience. ....

Emily Henderson , California Institute Of Technology United States , University Health Network Canada , University Of Toronto Canada , Max Planck Institute Of Microstructure Physics Germany , California Institute , United States , University Health Network , Max Planck Institute , Microstructure Physics , Advanced Micro Foundry , Fluorescence Imaging , Magnetic Resonance Imaging , எமிலி ஹென்டர்சன் , கலிஃபோர்னியா நிறுவனம் ஆஃப் தொழில்நுட்பம் ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆரோக்கியம் வலைப்பின்னல் கனடா , பல்கலைக்கழகம் ஆஃப் டொராண்டோ கனடா , கலிஃபோர்னியா நிறுவனம் , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆரோக்கியம் வலைப்பின்னல் ,

Tiny implantable tool for light-sheet imaging of brain activity

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IMAGE: Optical microscope image of the implantable shanks (141 micron pitch) of a light sheet neural probe. Light is emitted by nanophotonic gratings on the shanks to form light sheets.
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Credit: Sacher et al., doi 10.1117/1.NPh.8.2.025003.
Tools that allow neuroscientists to record and quantify functional activity within the living brain are in great demand. Traditionally, researchers have used techniques such as functional magnetic resonance imaging, but this method cannot record neural activity with high spatial resolution or in moving subjects. In recent years, a technology called optogenetics has shown considerable success in recording neural activity from animals in real time with single neuron resolution. Optogenetic tools use light to control neurons and record signals in tissues that are genetically modified to express light-sensitive and fluorescent proteins. However, existing technologies for imaging light signals from the brain ....

California Institute Of Technology United States , University Health Network Canada , University Of Toronto Canada , Max Planck Institute Of Microstructure Physics Germany , California Institute , United States , University Health Network , Max Planck Institute , Microstructure Physics , Advanced Micro Foundry , கலிஃபோர்னியா நிறுவனம் ஆஃப் தொழில்நுட்பம் ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆரோக்கியம் வலைப்பின்னல் கனடா , பல்கலைக்கழகம் ஆஃப் டொராண்டோ கனடா , கலிஃபோர்னியா நிறுவனம் , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆரோக்கியம் வலைப்பின்னல் ,

A charge-density-wave topological semimetal

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IMAGE: X-ray diffraction intensities recorded in the vicinity of the (620,000) main reflection of the charge-density-wave (CDW) phase of the topological Weyl semimetal (TaSe4)2I. Small (red) indices label satellite reflections. The.
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Credit: MPI of Microstructure Physics
Topological materials are characterised by unique electronic and physical properties that are determined by the underlying topology of their electronic systems. Scientists from the Max Planck Institutes for Microstructure Physics (Halle) and for Chemical Physics of Solids (Dresden) have now discovered that (TaSe4)2I is the first material in which a charge density wave induces a phase transition between the semimetal to insulator state. ....

Yulin Chen , Claudia Felser , Weyl Semimetal , Halle Saale , Andrei Bernevig , Holger Meyerheim , Stuart Parkin , Max Planck Institute For Microstructure Physics , Princeton University , Oxford University , Chinese Academy Of Sciences , Max Planck Institutes , Microstructure Physics , Chemical Physics , Max Planck Institute , Chinese Academy , Nature Physics , European Synchrotron Radiation Facility , Topological Weyl Semimetal , Chemistry Physics Materials Sciences , யூலின் சென் , ஹால் ஸேயேல் , ஸ்டூவர்ட் பார்கின் , ப்ரிந்ஸ்டந் பல்கலைக்கழகம் , ஆக்ஸ்ஃபர்ட் பல்கலைக்கழகம் , சீன கலைக்கழகம் ஆஃப் அறிவியல் ,

Physics - Expanding the Scope of Electronic-Structure Theory

Expanding the Scope of Electronic-Structure Theory
December 16, 2020•
R. Godby/University of York
Figure 1: The diffraction patterns on the right are the Fourier transforms of the crystal structures on the left. (Top) A normal periodic solid. (Bottom) A spatially modulated version of the solid: each diffraction peak on the right becomes decorated with a small number of “satellite” peaks that reflect the nature of the spatial modulation. The new method effectively harnesses this concept of satellite peaks to give an efficient way of calculating and storing the electron wave functions, charge density, and magnetization density of a modulated solid, especially when the modulation is on a long length scale.The diffraction patterns on the right are the Fourier transforms of the crystal structures on the left. (Top) A normal periodic solid. (Bottom) A spatially modulated version of the solid: each diffraction peak on the right becomes decorated with a sm. Show m ....

United Kingdom , New Jersey , United States , Rex Godby , University Of Cambridge , R Godby University Of York , Max Planck Institute Of Microstructure Physics , University Of York , Department Of Physics , Max Planck Institute , Microstructure Physics , Bell Labs , ஒன்றுபட்டது கிஂக்டம் , புதியது ஜெர்சி , ஒன்றுபட்டது மாநிலங்களில் , ரெக்ஸ் கோட்பி , பல்கலைக்கழகம் ஆஃப் கேம்பிரிட்ஜ் , ர் கோட்பி பல்கலைக்கழகம் ஆஃப் யார்க் , பல்கலைக்கழகம் ஆஃப் யார்க் , துறை ஆஃப் இயற்பியல் , மணி ஆய்வகங்கள் ,