Current Research

Selected Publications

Wilder AM, Hiatt SD, Dowden BR, Brown NA, Normann RA, Clark GA, Automated stimulus-response mapping of high-electrode-count neural implants. IEEE Trans Neural Syst Rehabil Eng 2009 Oct;17(5):504-11

Normann RA, Greger B, House P, Romero SF, Pelayo F, Fernandez E, Toward the development of a cortically based visual neuroprosthesis. J Neural Eng 2009 Jun;6(3):035001

Gunalan K, Warren DJ, Perry JD, Normann RA, Clark GA, An automated system for measuring tip impedance and among-electrode shunting in high-electrode count microelectrode arrays. J Neurosci Methods 2009 Apr 15;178(2):263-9

Hsu JM, Rieth L, Normann RA, Tathireddy P, Solzbacher F, Encapsulation of an integrated neural interface device with Parylene C. IEEE Trans Biomed Eng 2009 Jan;56(1):23-9

Bhandari R, Negi S, Rieth L, Normann RA, Solzbacher F, A Novel Method of Fabricating Convoluted Shaped Electrode Arrays for Neural and Retinal Prostheses. Sens Actuators A Phys 2008;145-146(1-2):123-130

Kim S, Tathireddy P, Normann RA, Solzbacher F, Thermal impact of an active 3-D microelectrode array implanted in the brain. IEEE Trans Neural Syst Rehabil Eng 2007 Dec;15(4):493-501

Normann RA, Technology insight: future neuroprosthetic therapies for disorders of the nervous system. Nat Clin Pract Neurol 2007 Aug;3(8):444-52

Kim SJ, Badi AN, Normann RA, Selective activation of cat primary auditory cortex by way of direct intraneural auditory nerve stimulation. Laryngoscope 2007 Jun;117(6):1053-62

Badi AN, Owa AO, Shelton C, Normann RA, Electrode independence in intraneural cochlear nerve stimulation. Otol Neurotol 2007 Jan;28(1):16-24

Guillory KS, Shoham S, Normann RA, Discrete stimulus estimation from neural responses in the turtle retina. Vision Res 2006 Jun;46(12):1876-85

Kim SJ, Manyam SC, Warren DJ, Normann RA, Electrophysiological mapping of cat primary auditory cortex with multielectrode arrays. Ann Biomed Eng 2006 Feb;34(2):300-9

Kim S, Normann RA, Harrison R, Solzbacher F, Preliminary study of the thermal impact of a microelectrode array implanted in the brain. Conf Proc IEEE Eng Med Biol Soc 2006;1():2986-9

House PA, MacDonald JD, Tresco PA, Normann RA, Acute microelectrode array implantation into human neocortex: preliminary technique and histological considerations. Neurosurg Focus 2006 May 15;20(5):E4

Lehmkuhle MJ, Normann RA, Maynard E , Trial-by-Trial Discrimination of Three Enantiomer Pairs by Neural Ensembles in Mammalian Olfactory Bulb. J Neurophysiol 2005 Nov 23;():

Solzbacher F, Harrison RR, Normann RA, Oppermann H, Klein M, Koch K , Integrated neural interfaces arrays for neuroprosthetics applications. Nanomedicine 2005 Sep;1(3):250-1

Warren DJ, Normann RA, Functional reorganization of primary visual cortex induced by electrical stimulation in the cat. Vision Res 2005 Mar;45(5):551-65

McDonnall D, Clark GA, Normann RA, Selective motor unit recruitment via intrafascicular multielectrode stimulation. Can J Physiol Pharmacol 2004 Aug-Sep;82(8-9):599-609

Warren DJ, Koulakov A, Normann RA, Spatiotemporal encoding of a bar's direction of motion by neural ensembles in cat primary visual cortex. Ann Biomed Eng 2004 Sep;32(9):1265-75

McDonnall D, Clark GA, Normann RA, Interleaved, multisite electrical stimulation of cat sciatic nerve produces fatigue-resistant, ripple-free motor responses. IEEE Trans Neural Syst Rehabil Eng 2004 Jun;12(2):208-15

Branner A, Stein RB, Fernandez E, Aoyagi Y, Normann RA, Long-term stimulation and recording with a penetrating microelectrode array in cat sciatic nerve. IEEE Trans Biomed Eng 2004 Jan;51(1):146-57

Hillman T, Badi AN, Normann RA, Kertesz T, Shelton C, Cochlear nerve stimulation with a 3-dimensional penetrating electrode array. Otol Neurotol 2003 Sep;24(5):764-8

Shoham S, Fellows MR, Normann RA, Robust, automatic spike sorting using mixtures of multivariate t-distributions. J Neurosci Methods 2003 Aug 15;127(2):111-22

Lehmkuhle MJ, Normann RA, Maynard EM, High-resolution analysis of the spatio-temporal activity patterns in rat olfactory bulb evoked by enantiomer odors. Chem Senses 2003 Jul;28(6):499-508

Badi AN, Kertesz TR, Gurgel RK, Shelton C, Normann RA, Development of a novel eighth-nerve intraneural auditory neuroprosthesis. Laryngoscope 2003 May;113(5):833-42

Badi AN, Hillman T, Shelton C, Normann RA, A technique for implantation of a 3-dimensional penetrating electrode array in the modiolar nerve of cats and humans. Arch Otolaryngol Head Neck Surg 2002 Sep;128(9):1019-25

Shoham S, Halgren E, Maynard EM, Normann RA, Motor-cortical activity in tetraplegics. Nature 2001 Oct 25;413(6858):793

Branner A, Stein RB, Normann RA, Selective stimulation of cat sciatic nerve using an array of varying-length microelectrodes. J Neurophysiol 2001 Apr;85(4):1585-94

Warren DJ, Fernandez E, Normann RA, High-resolution two-dimensional spatial mapping of cat striate cortex using a 100-microelectrode array. Neuroscience 2001;105(1):19-31

Normann RA, Warren DJ, Ammermuller J, Fernandez E, Guillory S, High-resolution spatio-temporal mapping of visual pathways using multi-electrode arrays. Vision Res 2001;41(10-11):1261-75

Maynard EM, Fernandez E, Normann RA, A technique to prevent dural adhesions to chronically implanted microelectrode arrays. J Neurosci Methods 2000 Apr 15;97(2):93-101

Branner A, Normann RA, A multielectrode array for intrafascicular recording and stimulation in sciatic nerve of cats. Brain Res Bull 2000 Mar 1;51(4):293-306

Guillory KS, Normann RA, A 100-channel system for real time detection and storage of extracellular spike waveforms. J Neurosci Methods 1999 Sep 15;91(1-2):21-9

Maynard EM, Hatsopoulos NG, Ojakangas CL, Acuna BD, Sanes JN, Normann RA, Donoghue JP, Neuronal interactions improve cortical population coding of movement direction. J Neurosci 1999 Sep 15;19(18):8083-93

Normann RA, Maynard EM, Rousche PJ, Warren DJ, A neural interface for a cortical vision prosthesis. Vision Res 1999 Jul;39(15):2577-87

Shah MR, Phillips RP, Normann RA, A study of printed spiral coils for neuroprosthetic transcranial telemetry applications. IEEE Trans Biomed Eng 1998 Jul;45(7):867-76

Jones KE, Normann RA, An advanced demultiplexing system for physiological stimulation. IEEE Trans Biomed Eng 1997 Dec;44(12):1210-20

Maynard EM, Nordhausen CT, Normann RA, The Utah intracortical Electrode Array: a recording structure for potential brain-computer interfaces. Electroencephalogr Clin Neurophysiol 1997 Mar;102(3):228-39

Nordhausen CT, Maynard EM, Normann RA, Single unit recording capabilities of a 100 microelectrode array. Brain Res 1996 Jul 8;726(1-2):129-40

Nordhausen CT, Rousche PJ, Normann RA, Optimizing recording capabilities of the Utah Intracortical Electrode Array. Brain Res 1994 Feb 21;637(1-2):27-36

Johansson T, Abbasi M, Huber RJ, Normann RA, A three-dimensional architecture for a parallel processing photosensing array. IEEE Trans Biomed Eng 1992 Dec;39(12):1292-7

Cha K, Horch KW, Normann RA, Mobility performance with a pixelized vision system. Vision Res 1992 Jul;32(7):1367-72

Cha K, Horch KW, Normann RA, Boman DK, Reading speed with a pixelized vision system. J Opt Soc Am A 1992 May;9(5):673-7

Cha K, Horch K, Normann RA, Simulation of a phosphene-based visual field: visual acuity in a pixelized vision system. Ann Biomed Eng 1992;20(4):439-49

Rousche PJ, Normann RA, A method for pneumatically inserting an array of penetrating electrodes into cortical tissue. Ann Biomed Eng 1992;20(4):413-22

Jones KE, Campbell PK, Normann RA, A glass/silicon composite intracortical electrode array. Ann Biomed Eng 1992;20(4):423-37

Muller JF, Ammermüller J, Normann RA, Kolb H, Synaptic inputs to physiologically defined turtle retinal ganglion cells. Vis Neurosci 1991 Nov;7(5):409-29

Campbell PK, Jones KE, Huber RJ, Horch KW, Normann RA, A silicon-based, three-dimensional neural interface: manufacturing processes for an intracortical electrode array. IEEE Trans Biomed Eng 1991 Aug;38(8):758-68

Normann RA, Perlman I, Background and bleaching adaptation in luminosity type horizontal cells in the isolated turtle retina. J Physiol 1990 Feb;421():321-41

Campbell PK, Jones KE, Normann RA, A 100 electrode intracortical array: structural variability. Biomed Sci Instrum 1990;26():161-5

Campbell PK, Normann RA, Horch KW, Stensaas SS, A chronic intracortical electrode array: preliminary results. J Biomed Mater Res 1989 Aug;23(A2 Suppl):245-59

Lasater EM, Normann RA, Kolb H, Signal integration at the pedicle of turtle cone photoreceptors: an anatomical and electrophysiological study. Vis Neurosci 1989;2(6):553-64

Normann RA, Johnson RW, Messinger JE, Sohrab B, A continuous cardiac output computer based on thermodilution principles. Ann Biomed Eng 1989;17(1):61-73

Normann RA, Perlman I, Anderton PJ, Modulation of cone-to-horizontal-cell signal transmission in the turtle retina by magnesium ions. Brain Res 1988 Mar 8;443(1-2):95-100

Kolb H, Perlman I, Normann RA, Neural organization of the retina of the turtle Mauremys caspica: a light microscope and Golgi study. Vis Neurosci 1988;1(1):47-72

Johnson RW, Normann RA, Signal processing strategies for enhancement of signal-to-noise ratio of thermodilution measurements. Ann Biomed Eng 1988;16(3):265-78

Johnson RW, Normann RA, Mathematical and mechanical modeling of heat transport through the heart. Ann Biomed Eng 1987;15(6):603-17