Can someone provide me with some information about mouse vagus nerve electrical stimulation using a concentric electrode? I cannot get the concentric electrode to stimulate the nerve. I have even tried poking the electrode into the nerve but all I get is a shock artifact. I have changed the angle of the concentric electrode when I am about to touch the nerve with the tip of the electrode. Its always a hit or a miss with these recordings. Any tips on how to improve would be really appreciated.