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Cheap probe for the magnetic field induced by your TMS

I wanted to check the timing of a TMS-protocol using an external trigger, and sometimes i want to demonstrate the current induction in class. MagVenture sells the MagProbe, to be plugged into BNC or DIN. This would allow you to measure the magnetic field induced by the TMS. They also offer a 3-D version, and… Read more »

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On exploiting the cue from cue-paced, synchronous BCIs

Many BCIs are cue-paced, i.e. they signal the start and end of the control phase to the user. Because this gives the BCI a task-like structure, such a synchronous approach is not very useful for assistive applications. Yet, there are several benefits of such a task-structure, which makes this approach very applicable for restorative BCIs… Read more »

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Connecting BVR, Magventure and Localite – Make the Box

In an earlier post, i described how to connect Brain Vision Recorder, a Magventure TMS and Localite Software. In a later post, i describe how to solder the circuit. This would allow more flexible recordings  according to your uniqe needs, e.g. multi-channel MEP mapping. As i am currently constructing another box for our second TMS-device,… Read more »

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Anodal stimulation over M1 might actually have effects on alpha power

Horvath and colleagues published recently two large meta-analysis of effects of tDCS on cognitive measures and neurophysiological measures [1,2]. Essentially, they claim that tDCS has no reliable effects besides MEP modulation. And the effect size of this modulation appears to be decreasing since the first studies on tDCS fifteen years ago. This sounds like very… Read more »

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Connecting BVR, Magventure and Localite – Discussing the Idea

Recently, our lab purchased two MagVenture TMS devices together with the Localite setup for navigation. Both companies are independent, but collaborating strongly. Magventure offers the stimulator, Localite the hardware and software for navigation. The Magventure GUI is very easy to handle and i like how the Localite software allows to use template MRIs. It gives… Read more »

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Neurosensory Effects of Transcranial Alternating Current Stimulation

Probably everyone using transcranial current stimulation has made the experience that stimulation can cause neurosensory effects. This makes blinding the stimulation difficult, or even impossible. Usually, flickering phosphenes and skin sensations are perceived, but we also had subjects reporting feelings of dizziness and pressure. There is evidence that sensations elicited by tDCS fade with stimulation… Read more »