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Gregory A. Clark

Phone: 801-585-9796
Office: 506B BPRB

Gregory A. Clark

Ph.D., Psychobiology
University of California, Irvine


Electrophysiological, cellular, and computational analyses of neuronal plasticity in simple systems (Aplysia and Hermissenda); neural information processing; bio-based neuroprostheses

Selected Publications

Davis TS, Wark HA, Hutchinson DT, Warren DJ, O'Neill K, Scheinblum T, Clark GA, Normann RA, Greger B, Restoring motor control and sensory feedback in people with upper extremity amputations using arrays of 96 microelectrodes implanted in the median and ulnar nerves. J Neural Eng 2016 Jun;13(3):036001

Frankel MA, Mathews VJ, Clark GA, Normann RA, Meek SG, Control of Dynamic Limb Motion Using Fatigue-Resistant Asynchronous Intrafascicular Multi-Electrode Stimulation. Front Neurosci 2016;10:414

Christensen MB, Pearce SM, Ledbetter NM, Warren DJ, Clark GA, Tresco PA, The foreign body response to the Utah Slant Electrode Array in the cat sciatic nerve. Acta Biomater 2014 Nov;10(11):4650-4660

Ledbetter NM, Ethier C, Oby ER, Hiatt SD, Wilder AM, Ko JH, Agnew SP, Miller LE, Clark GA, Intrafascicular stimulation of monkey arm nerves evokes coordinated grasp and sensory responses. J Neurophysiol 2013 Jan;109(2):580-90

Abaya TV, Diwekar M, Blair S, Tathireddy P, Rieth L, Clark GA, Solzbacher F, Characterization of a 3D optrode array for infrared neural stimulation. Biomed Opt Express 2012 Sep 1;3(9):2200-19

Normann RA, Dowden BR, Frankel MA, Wilder AM, Hiatt SD, Ledbetter NM, Warren DA, Clark GA, Coordinated, multi-joint, fatigue-resistant feline stance produced with intrafascicular hind limb nerve stimulation. J Neural Eng 2012 Apr;9(2):026019

Dowden BR, Frankel MA, Normann RA, Clark GA, Non-invasive method for selection of electrodes and stimulus parameters for FES applications with intrafascicular arrays. J Neural Eng 2012 Feb;9(1):016006

Frankel MA, Dowden BR, Mathews VJ, Normann RA, Clark GA, Meek SG, Multiple-input single-output closed-loop isometric force control using asynchronous intrafascicular multi-electrode stimulation. IEEE Trans Neural Syst Rehabil Eng 2011 Jun;19(3):325-32

Clark GA, Ledbetter NM, Warren DJ, Harrison RR, Recording sensory and motor information from peripheral nerves with Utah Slanted Electrode Arrays. Conf Proc IEEE Eng Med Biol Soc 2011;2011:4641-4

Dowden BR, Wilder AM, Hiatt SD, Normann RA, Brown NA, Clark GA, Selective and graded recruitment of cat hamstring muscles with intrafascicular stimulation. IEEE Trans Neural Syst Rehabil Eng 2009 Dec;17(6):545-52

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

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

Butson CR, Clark GA, Random noise paradoxically improves light-intensity encoding in Hermissenda photoreceptor network. J Neurophysiol 2008 Jan;99(1):146-54

Butson CR, Clark GA, Mechanisms of noise-induced improvement in light-intensity encoding in Hermissenda photoreceptor network. J Neurophysiol 2008 Jan;99(1):155-65

Nesse WH, Clark GA, Bressloff PC, Spike patterning of a stochastic phase model neuron given periodic inhibition. Phys Rev E Stat Nonlin Soft Matter Phys 2007 Mar;75(3 Pt 1):031912

Guan X, Clark GA, Essential role of somatic and synaptic protein synthesis and axonal transport in long-term synapse-specific facilitation at distal sensorimotor connections in Aplysia. Biol Bull 2006 Jun;210(3):238-54

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

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

Schultz LM, Butson CR, Clark GA, Post-light potentiation at type B to A photoreceptor connections in Hermissenda. Neurobiol Learn Mem 2001 Jul;76(1):7-32