Multiplexed, high density electrophysiology with nanofabricated neural probes.
Extracellular electrode arrays can reveal the neuronal network correlates of behavior with single-cell, single-spike, and sub-millisecond resolution. However, implantable electrodes are inherently invasive, and efforts to scale up the number and density of recording sites must compromise on device size in order to connect the electrodes. Here, we report on silicon-based neural probes employing nanofabricated, high-density electrical leads. Furthermore, we address the challenge of reading out multichannel data with an application-specific integrated circuit (ASIC) performing signal amplification, band-pass filtering, and multiplexing functions. We demonstrate high spatial resolution extracellular measurements with a fully integrated, low noise 64-channel system weighing just 330 mg. The on-chip multiplexers make possible recordings with substantially fewer external wires than the number of input channels. By combining nanofabricated probes with ASICs we have implemented a system for performing large-scale, high-density electrophysiology in small, freely behaving animals that is both minimally invasive and highly scalable.
Division of Biology, California Institute of Technology, Pasadena, California, United States of America.
Jiangang
J
Du
Timothy J
TJ
Blanche
Reid R
RR
Harrison
Henry A
HA
Lester
Sotiris C
SC
Masmanidis
D000818:Animals; D001522:Behavior, Animal; D004566:Electrodes; D055724:Electrophysiological Phenomena; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D015335:Molecular Probes / Q000737:chemistry; D049329:Nanostructures / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods*; D009474:Neurons / Q000378:metabolism*; D012815:Signal Processing, Computer-Assisted; D012825:Silicon / Q000737:chemistry; D013696:Temperature
D015335:Molecular Probes; D012825:Silicon