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Category Archives: Neuronal activity
Interesting papers on VIP interneurons in cortex and hippocampus
Interneurons are inhibitory neurons in the brain that are thought to shape the computations performed by principal cells. The effects of inhibition can be rather diverse, depending on which neurons – or which parts of a neuron (dendrites, soma, or … Continue reading
Posted in Calcium Imaging, Data analysis, hippocampus, Imaging, Neuronal activity, neuroscience, Reviews
Tagged Calcium Imaging, Data analysis
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Accurately computing noise levels for calcium imaging data
It is fascinating how much data quality can vary between different calcium imaging data sets. In this blog post, I will discuss a metric to quantify and compare data quality and in particular shot noise between calcium imaging datasets. This … Continue reading
Open PhD position in my research group
Are you a finishing Master’s student with a quantitative background and are interested in neuroscience? This is your opportunity. Project: You will be supervised by Dr. Peter Rupprecht and Prof. Fritjof Helmchen at the Brain Research Institute, University of Zurich. … Continue reading
Annual report of my intuition about the brain (2024)
The brain is a complex system that cannot be understood by a strictly structured approach. Knowledge must grow organically, and a systematic approach can sometimes hinder understanding. In formal education, this truth is often hidden because curricula and instructors provide the structuring of knowledge already. But when it comes to acquiring new knowledge and insight, rather than merely processing and assembling pre-existing knowledge, this systematic approach must be continuously interrupted and re-invented to enable real progress. Continue reading
Posted in Data analysis, Neuronal activity, neuroscience, Reviews
Tagged brain, neuroscience, research, science, theoretical neuroscience, writing
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Spike inference with GCaMP8: new pretrained models available
Calcium imaging is only an indirect readout of neuronal activity via fluorescence signals. To estimate the true underlying firing rates of these neurons, methods for “spike inference” have been developed. They are useful to denoise calcium imaging data and make … Continue reading
A collaborative review on error signals in predictive processing
Predictive processing is one of the most influential ideas from computational neuroscience for the experimental neurosciences. However, definitions of predictive processing vary broadly, to the extent that “predictive coding” is used sometimes in a very narrow sense (there are specific … Continue reading
Four interesting papers on astrocyte physiology
A review of four interesting recent papers on astrocyte neuroscience: (1) Norepinephrine Signals Through Astrocytes To Modulate Synapses (2) A spatial threshold for calcium surge (3) Network-level encoding of local neurotransmitters in cortical astrocytes, and (4) Continue reading
Posted in Calcium Imaging, Data analysis, hippocampus, Imaging, Microscopy, Neuronal activity, neuroscience, Reviews, zebrafish
Tagged Calcium Imaging, Data analysis, Microscopy, zebrafish
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Why your two-photon images are noisier than you expect
A gallery of calcium imaging recordings of neurons and astrocytes with single noisy frames on the left and averaged beautiful noise-free images on the right side. Continue reading
Posted in Calcium Imaging, Data analysis, hippocampus, Imaging, Microscopy, Neuronal activity, neuroscience, zebrafish
Tagged Calcium Imaging, Data analysis, Microscopy, photons, Scanning, zebrafish
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Three recent interesting papers on computational neuroscience
Three papers:
1. The Neuron as a Direct Data-Driven Controller
2. A learning algorithm beyond backpropagation
3. Continuous vs. discrete representations in a recurrent network Continue reading
Annual report of my intuition about the brain (2023)
How does the brain work and how can we understand it? To view this big question from a broad perspective, I’m reporting some ideas about the brain that marked me most during the past twelve months and that, on the … Continue reading
Posted in hippocampus, Neuronal activity, Review
Tagged evolution, language, theoretical neuroscience
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A blog about neurophysiology 