Figure 10.

Recording spikes inside the bore of the 16.4T MRI scanner introduces additional interferences. (a) Recording on the benchtop outside the bore shows clean MUA signal. (b) After inserting the rat into the bore, periodic interferences caused by mechanical vibration are observed – these interferences depend on the quality of hardware isolation from mechanical vibration - here we have displayed the case of poor isolation. (c) Enabling the MRI gradient amplifier hardware substantially increases the noise floor. (d,e,f) The signals corresponding to (a,b,c) after adaptive virtual referencing.