Ingestible Electronics Integrated with Flexible Measurement Electrodes for Gastrointestinal Bioelectric Sensing

Some aspects of the present disclosure are related to articles for measuring electrical signals internal to a subject, e.g., of the gastrointestinal tract (GI tract). The articles, in some embodiments, are ingestible and/or implantable. In some embodiments, the articles comprise a substrate comprising a plurality of electrodes, the substrate having a Young's elastic modulus of greater than or equal to 0.01 MPa and less than or equal to 200 MPa. In some such cases, the Young's elastic modulus of the substrate facilitates elastic recoil of the substrate such that at least a portion of the plurality of electrodes contact a surface of a tissue at the location internal to the subject (e.g., the GI tract) and thus facilitate measurement of electrical signals at the location internal to the subject. Other aspects are related to methods of using the articles, for example, to monitor electrical signals from the location internal to the subject.