Research Areas -- Richard A. Normann

  • Cortical Implants for the Blind

    Univ. of California (Berkeley). Neuroprosthetics, vision neurophysiology.

    Work is ongoing in applied and basic studies of the central nervous system. Key in this work is the development of three dimensional, silicon based electrode arrays to be used to stimulate or record from the neurons of the central nervous system. Passing currents through arrays implanted in visual or auditory parts of the brain, could produce a sense of sight in the blind or hearing in the deaf. If implanted in the motor parts of the brain, these arrays could be used to record neural signals for controlling external systems (like a wheel chair). The arrays are also being used to study the parallel processing of sensory information by the retina and higher visual centers.

    C.T. Nordhausen, P.J. Rousche, and R.A. Normann, "Optimizing Recording Capabilities of the Utah Intracortical Electrode Array," Brain Res. 637, 27-36 (1994).

    I. Perlman, J. Sullivan, and R.A. Normann, "Voltage and Time Dependent Potassium Conductances Enhance the Frequency Response of Horizontal Cells in the Turtle Retina," Brain Research, 619, 89-97 (1993).

    K.E. Jones, P.K. Campbell, and R.A. Normann, "A Glass/Silicon Composite Intracortical Electrode Array," Annals of Biomedical Engineering 20, 423-437 (1992).