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Lecture notes on EEG/LFP analysis
I was looking for some Matlab code for computing phase-locking histograms from LFPs and I stumbled upon these lecture notes for a psychology class at University of Arizona by John J.B. Allen. The Advanced Signal Processing class covers different approaches for computing inter-trial and inter-electrode phase locking. There’s some lecture slides, matlab code, and even
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Smoothing a non-uniformly sampled surface
Working with 2d data defined on a grid is pretty straightforward in Matlab; you can easily visualize the data with imagesc and smooth it through convolution. Working with data sampled at non-uniform intervals is much trickier. Doing something as simple as visualizing it becomes a pain. One way of getting around this is to resample
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Natural vs. synthetic stimuli for estimating receptive fields
Is it better to use natural or synthetic stimuli to estimate receptive fields? Vargha Talebi & Curtis Baker (who’s on my committee btw) have a new paper out in J Neurosci suggesting that RFs estimated with natural images generalize better to other stimulus ensembles than white noise or flashed bar stimuli. They mapped area 18
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Hierarchical processing of complex motion
I’m thrilled to announce that our paper, Hierarchical processing of complex motion along the dorsal visual pathway, has been published in PNAS. In this work, we looked at the response properties of neurons in area MST (the medial superior temporal area). MST neurons are part of the dorsal visual pathway; they are strongly selective for
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Idle reading
I’ve been swamped with work, so I haven’t had time to write original pieces for the blog. This will come soon enough, in the meantime, here’s some sciency stuff you might like. In case of a spider apocalypse, wear red Webvision reports on a fascinating study in Science on the use of defocus as a
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Setting up a cluster for the analysis of neural array data
As I’ve mentioned before, we’ve been recording from a Utah array for more than a year now. We use a custom Plexon MAP system that allows for the recording of wideband data at 10 kHz over 96 channels. This custom configuration was requested so that we can get spike-free LFPs by preprocessing wideband data with
xcorr: AI & neuro 