Decoding 3D search coil signals in a non-homogeneous magnetic field

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Abstract

We present a method for recording eye-head movements with the magnetic search coil technique in a small external magnetic field. Since magnetic fields are typically non-linear, except in a relative small region in the center small field frames have not been used for head-unrestrained experiments in oculomotor studies. Here we present a method for recording 3D eye movements by accounting for the magnetic non-linearities using the Biot-Savart law. We show that the recording errors can be significantly reduced by monitoring current head position and thereby taking the location of the eye in the external magnetic field into account. © 2010 Elsevier Ltd.

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Thomassen, J. S., Benedetto, G. D., & Hess, B. J. M. (2010). Decoding 3D search coil signals in a non-homogeneous magnetic field. Vision Research, 50(13), 1203–1213. https://doi.org/10.1016/j.visres.2010.03.017

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