(A) The EEG headset; (B) A schematic representation of the headset; (C) Cup gold electrodes mounted with a spring on a tube that can be filled with a conductive gel to encourage good electrical contact; (D) The position of the electrodes; (E) The electrode locations with the anatomical landmarks. Image: Cousillas et al Front. Vet. Sci., 02 May 2017 | https://doi.org/10.3389/fvets.2017.00057