Papers Published

1. Obeid, I. and Nicolelis, M.A.L. and Wolf, P.D., A multichannel telemetry system for single unit neural recordings, J. Neurosci. Methods (Netherlands), vol. 133 no. 1-2 (2004), pp. 33 - 8 [023] .
   (last updated on 2007/04/15)

   Abstract:
   We present the design, testing, and evaluation of a 16 channel wearable telemetry system to facilitate multichannel single unit recordings from freely moving test subjects. Our design is comprised of (1) a 16-channel analog front end board to condition and sample signals derived from implanted neural electrodes, (2) a digital board for processing and buffering the digitized waveforms, and (3) an index-card sized 486 PC equipped with an IEEE 802.11b wireless Ethernet card. Digitized data (up to 12bits of resolution at 31.25k samples/s per channel) is transferred to the PC and sent to a nearby host computer on a wireless local area network. Up to 12 of the 16 channels were transmitted simultaneously for sustained periods at a range of 9 m. The device measures 5.1 cm×8.1 cm×12.4 cm, weighs 235 g, and is powered from rechargeable lithium ion batteries with a lifespan of 45 min at maximum transmission power. The device was successfully used to record signals from awake, chronically implanted macaque and owl monkeys

   Keywords:
   bioelectric potentials;biomedical electrodes;biomedical telemetry;cells (electric);local area networks;medical signal processing;microcomputers;neurophysiology;signal sampling;system buses;