TY - JOUR T1 - High-density, long-lasting, and multi-region electrophysiological recordings using polymer electrode arrays JF - bioRxiv DO - 10.1101/242693 SP - 242693 AU - Jason E. Chung AU - Hannah R. Joo AU - Jiang Lan Fan AU - Daniel F. Liu AU - Alex H. Barnett AU - Supin Chen AU - Charlotte Geaghan-Breiner AU - Mattias P. Karlsson AU - Magnus Karlsson AU - Kye Y. Lee AU - Hexin Liang AU - Jeremy F. Magland AU - W. Hamish Mehaffey AU - Angela C. Tooker AU - Michael S. Brainard AU - Leslie F. Greengard AU - Vanessa M. Tolosa AU - Loren M. Frank Y1 - 2018/01/01 UR - http://biorxiv.org/content/early/2018/03/13/242693.abstract N2 - The brain is a massive neuronal network, organized into anatomically distributed sub-circuits, with functionally relevant activity occurring at timescales ranging from milliseconds to months. Current methods to monitor neural activity, however, lack the necessary conjunction of anatomical spatial coverage, temporal resolution, and long-term stability to measure this distributed activity. Here we introduce a large-scale, multi-site recording platform that integrates polymer electrodes with a modular stacking headstage design supporting up to 1024 recording channels in freely behaving rats. This system can support months-long recordings from hundreds of well-isolated units across multiple brain regions. Moreover, these recordings are stable enough to track 25% of single units for over a week. We also demonstrate long-lasting, single-unit recordings in songbird. This platform enables large-scale electrophysiological interrogation of the fast dynamics and long-timescale evolution of anatomically distributed circuits, and thereby provides a new tool for understanding brain activity. ER -