Systems and methods for applying and/or receiving electrical, magnetic, magnetoelectric, vibratory, or electromagnetic signals to biological tissues are described. In some embodiments, a system including a body and an electrode may be placed in contact with a biological tissue portion. A force may be applied to the body such that the body plastically deforms to adapt to a shape of the biological tissue portion, and the electrode may be used to apply and/or receive an electrical signal via the biological tissue portion.