About Peter Petersen ADMIN

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So far Peter Petersen ADMIN has created 35 blog entries.

Optogenetics/Brain Research: Optical developments take optogenetics deeper, less invasively

2018-12-03T21:07:05-05:00December 3rd, 2018|

Optogenetics has rocked the world of neuroscience for more than a decade now. But neuroscientists want more from the technique—and less, including more depth and less invasiveness. As neuroscientists progress in their application of optogenetics, they want to take it further. This is evidenced by an explosion in the development of light-sensitive opsins that allow researchers to target neurons with amazing specificity. The result has been an explosion in understanding the relationships between [...]

The Time Debate: The Neurons That Tell Time

2018-12-03T16:41:20-05:00December 3rd, 2018|

In June of 2007, Albert Tsao, a nineteen-year-old native of Silver Spring, Maryland, was working in Trondheim, Norway, at the Kavli Institute for Systems Neuroscience. Tsao was a summer intern in the lab of May-Britt and Edvard Moser, married researchers who were well known in neurobiology circles for discovering “grid cells”—neurons that, by tracking our position, create a navigational map in the brain. Grid cells are located in an area of the brain [...]

Cuba ‘sonic attack’ conspiracy theories and flawed science

2021-06-16T18:32:17-04:00June 1st, 2018|

Science works best when qualified people can evaluate evidence without political pressure to draw poorly founded conclusions, say 15 neuroscientists and physicists. Read the full story below or at theguardian.com As neuroscientists and physicists we have no reason to dispute that US diplomats living in Cuba heard loud noises, or that they reported feeling ill afterwards. Some US politicians have seized on these reports to construct conspiracy theories in which they imagine a mysterious disease-causing “sound [...]

Cross-Species Neuromodulation from High-Intensity Transcranial Electrical Stimulation

2018-04-01T20:33:59-04:00March 31st, 2018|

Review article in Trends in Cognitive Sciences about our recent paper, by Alik S. Widge Transcranial electrical stimulation (TES) is a proposed tool for non-invasively modulating human brain circuits, but its ability to affect cortical physiology remains unclear. A recent study merged TES with live animal and human cadaveric recordings to verify intracranial electrical effects, then used these findings to develop a novel neuro-modulation protocol. Read the full review here and see our related [...]

Brain Stimulation Is All the Rage–but It May Not Stimulate the Brain

2018-02-06T07:51:24-05:00February 6th, 2018|

Scientific American has written a piece about our recent paper by Mihály Vöröslakos et al. looking at the effects of transcranial electric stimulation in rats and humans. You can find their artic here and our below. Direct effects of transcranial electric stimulation on brain circuits in rats and humans. Mihály Vöröslakos, Yuichi Takeuchi, Kitti Brinyiczki, Tamás Zombori, Azahara Oliva, Antonio Fernández-Ruiz, Gábor Kozák, Zsigmond Tamás Kincses, Béla Iványi, György Buzsáki & Antal Berényi. Nature Communications 9 [...]

Learning-enhanced coupling between ripple oscillations in association cortices and hippocampus

2017-11-01T16:20:29-04:00November 1st, 2017|

Memory transfer for long-term storage Explicit memory formation involves the transfer of rapidly encoded information from the hippocampus to long-term storage sites in the association cortex. Khodagholy et al. developed a microelectrode system for large-scale simultaneous electrophysiological monitoring of multiple sites in the rat neocortex. They observed discrete high-frequency neocortical oscillations called ripples only in the association cortex. These cortical ripples shared many properties with hippocampal ripples. Hippocampal ripples were coupled with cortical [...]

Welcome to Omid Yaghmazadeh

2017-12-06T08:34:34-05:00October 17th, 2017|

Omid is our newest Postdoctoral fellow. He has background in Electrical Engineering and Electronic Devices. He received his PhD in Organic Electronics from Ecole Polytechnique, France and his current research interest and focus is on the interactions of external electromagnetic fields with the brain.

Pyramidal Cell-Interneuron Circuit Architecture and Dynamics in Hippocampal Networks

2017-10-16T13:45:58-04:00October 16th, 2017|

English, McKenzie, et al. identify, validate, and quantify monosynaptic connections between pyramidal cells and interneurons, using the spike timing of pre- and postsynaptic neurons in vivo. Their large-scale method uncovers a backbone of connectivity rules in the hippocampus CA1 circuit. Highlights Pyramidal cell-interneuron monosynaptic connections identified using spike timing Skewed distribution of connection probability and strength Short-term plasticity of connection strength is synapse specific Presynaptic cooperativity and postsynaptic timing impact spike transmission probability [...]