Apparatuses and methods for electrophysiological signal delivery and recording during MRI

A system for delivering or receiving electrical signals to or from the head of a subject, the system comprising:

• an electrode carrier;
• a plurality of electrodes configured to communicate electrical signals and connected to the carrier, the carrier configured and arranged for placement on the head of the subject and, upon placement thereon, arranged to position the electrodes for transmitting electrical signals to or from the head;
• a conductive trace configured to be electrically connected to the subject to communicate the electrical signals;
• wherein each electrode includes a conductive lead electrically extending from the conductive trace to communicate the electrical signals, the conductive lead configured to be electrically isolated from the subject and extending to a connector;
• wherein the conductive lead comprises a polymer thick film, the polymer thick film having a resistivity in a range of 1 kilo-ohm·meter to 100 kilo-ohm·meters, the resistivity of the polymer thick film selected to reduce exposure from RF pulses used during magnetic resonance imaging, said resistivity substantially dispersed through the extent of the conductive lead;
• and
• wherein the conductive trace forms a partial circle and the conductive lead is electrically connected to the conductive trace between two endpoints of the partial circle.