Author Archives: jvoigts

Mirror alignment target for 2-photon microscopes

When aligning the laser path of a system in which mirrors are translated, like for instance for the x/y/z adjustments on a 2-photon microscope, the laser path needs to be kept in parallel with each of the translation axes. Also, … Continue reading

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Cheap dental drill

Common dental drills are useful/required to have in any systems lab. In addition to the usual applications, these can be used to cut holes in cover slides (diamond abrasive burrs), to cut small openings in drive implant bodies, smooth out dental cement, … Continue reading

Posted in Calcium imaging, Electrophysiology | Comments Off on Cheap dental drill

Open Ephys @ SfN2016

There’s a lot of Open Ephys and open-source science related stuff going on at SfN this year: We will be hanging out at our poster on Wed., Nov16, afternoon, MMM62 and talk about, the next generation system and interface standard that we’ve … Continue reading

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Backlight for high-speed video whisker tracking

Here’s a simple recipe for a very bright uniform background for high-speed videography. This approach will work well for any applications where the outline of a small objects needs to be measured at high frame rates. For vibrissa tracking, or … Continue reading

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Simultaneous 2p imaging and visible-light optogenetics

We recently needed to verify how a large population of neurons reacts to weak optogenetic stimulation. We found that with a relatively straightforward setup, visible light optogenetic stimulation can be integrated into existing 2p rigs without resulting in problematic imaging … Continue reading

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High quality time series plots

What is the best, or at least a good way to plot time-series data on a screen? When dealing with time series data in electrophysiology, a good deal of time is spent looking at plots in order to judge data … Continue reading

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Fast approximate whisker tracking in the gap-crossing task

After finding the mouse’s nose position (see post on Tracking mouse position in the gap-crossing task), I wanted to get a fast, robust estimate of the basic whisking pattern, together with approximate times when whiskers could have been in contact with … Continue reading

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Tracking mouse position in the gap-crossing task

This post is a quick walk-through of some code I recently wrote for tracking rough mouse position and a few other things in high-speed video in a gap-crossing task. This code is just very basic image processing, ugly hacks and … Continue reading

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Open Ephys poster and meeting @SfN2015

There will be two main Open Ephys events at this years SfN: Aaron, Josh, Yogi, Jon, myself and others will be hanging out at our poster on Sunday afternoon, BB46 and talk about as well as demo the upcoming plugin interface (C++, … Continue reading

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Poster @ SfN2015

I’ll be presenting some new work on the role of cortical layer 6 on representing sensory change at SfN on Sunday, morning session, Poster O17.

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