A list of selected publications follows. For briefer lists in specific areas, use these links:
Baker, J.L., Toth, R., Deli, A., Zamora, M., Fleming, J.E., Benjaber, M., Goerzen, D., Ryou, J.W., Purpura, K.P., Schiff, N.D. and Denison, T. (2023)
Regulation of arousal and performance of a healthy non-human primate using closed-loop central thalamic deep brain stimulation.
Int IEEE EMBS Conf Neural Eng 2023: 10123754.
PMC
Guidolin, A., Desroches, M., Victor, J.D., Purpura, K.P., and Rodrigues, R. (2022)
Geometry of spiking patterns in early visual cortex: a topological data analytic approach.
Journal of the Royal Society Interface 19: 20220677.
Abstract and download
Janson, A.P., Baker, J.L., Sani,I., Purpura, K.P., Schiff, N.D., and Butson, C.R. (2021)
Selective activation of central thalamic fiber pathway facilitates behavioral performance in healthy non-human primates.
Scientific Reports 11, 23054.
Abstract and download
Yao, L., Baker, J.L., Schiff, N.D., Purpura, K.P., Shoaran M. (2021)
Predicting task performance from biomarkers of mental fatigue in global brain activity.
J Neural Eng. 2021 Mar 8;18(3):10.1088/1741-2552/abc529.
Abstract and download
Baker, J. L., Ryou, J.-W., Wei, X.F., Butson, C.R., Schiff, N.D., and Purpura, K.P.(2016)
Robust modulation of arousal regulation, performance and frontostriatal activity through
central thalamic deep brain stimulation in healthy non-human primates.
J Neurophysiol. 116, 2383-2404.
Abstract and download
Schmid, A.M., Purpura, K.P., and Victor, J.D. (2014)
Responses to orientation discontinuities in V1 and V2: Physiological dissociations and functional implications.
J. Neurosci. 34, 3559–3578.
Abstract and download
Ohiorhenuan, I.E., Mechler, F., Purpura, K.P., Schmid, A.M., Hu, Q., and Victor, J.D. (2014)
Cannabinoid neuromodulation in the adult early visual cortex.
PLoS ONE 9, e87362.
Abstract, download, and supplement
Schiff, N.D., Shah, S.A., Hudson, A.E., Nauvel, T., Kalik, S.F., and Purpura, K.P. (2013)
Gating of attentional effort through the central thalamus.
J. Neurophysiol. 109, 1152-1163.
Abstract and download
Ohiorhenuan, I.E., Mechler, F., Purpura, K.P., Schmid, A.M., and Victor, J.D. (2010)
Sparse coding and high-order correlations in fine-scale cortical networks.
Nature 466, 617–621.
Abstract and download
Victor, J.D., and Purpura, K.P. (2010) Spike Metrics.
In: Analysis of Parallel Spike Trains. Ed. Stefan Rotter and Sonja Gruen. Springer, pp. 129-156.
Abstract and download
Menzer, D.L., Bokil, H., Ryou, J.W., Schiff, N.D., Purpura, K.P., and Mitra, P.P. (2009)
Characterization of trial-to-trial fluctuations in local field potentials recorded in cerebral cortex of awake behaving macaque.
J. Neurosci. Methods 186, 250-261.
Abstract and download
Shah, S.A., Baker, J.L., Ryou, J.W., Purpura, K.P., and Schiff, N.D. (2009)
Modulation of arousal regulation with central thalamic deep brain stimulation.
Conf. Proc. IEEE. Eng. Med. Biol. Soc. 1, 3314-3317.
Abstract and download
Victor, J.D., Mechler, F., Ohiorhenuan, I.E., Schmid, A., and Purpura, K.P. (2009)
Laminar and orientation-dependent characteristics of spatial nonlinearities:
implications for the computational architecture of visual cortex.
Journal of Neurophysiology 102, 3414-3432.
Abstract and download
Schmid, A.M., Purpura, K.P., Ohiorhenuan, I.E., Mechler, F., and Victor, J.D. (2009)
Subpopulations of neurons in visual area V2 perform differentiation and integration operations
in space and time.
Frontiers in Systems Neuroscience 3, 15, doi:10.3389/neuro.06.015.2009.
Abstract and download
Hudson, A.E., Schiff, N.D., Victor, J.D, and Purpura, K.P. (2009)
Attentional modulation of adaptation in V4.
Eur. J. Neurosci. 30,151-171.
Abstract and download
Smith, A.C., Shah, S., Hudson, A.E., Purpura, K.P., Victor, J.D., Brown, E.N., and Schiff, N.D. (2009)
A Bayesian statistical analysis of behavioral facilitation associated with deep brain stimulation. J. Neurosci. Meth. 183, 267-276.
Abstract and download
Purpura, K.P. and Bokil, H.S. (2008)
Neural signal processing: Tutorial I.
In: Neural Signal Processing: Quantitative Analysis of Neural Activity, (Mitra P., ed), 67-77.
Washington, DC: Society for Neuroscience.
Introduction and download
Bokil, H.S., Purpura, K., Schoffelen, J.-M., Thomson, D., and Mitra, P.P. (2007)
Comparing spectra and coherences for groups of unequal size.
J. Neurosci. Methods 159, 337-345.
Abstract and download
Victor, J.D., Mechler, F., Repucci, M.A., Purpura, K.P., and Sharpee, T. (2006)
Responses of V1 neurons to two-dimensional Hermite functions.
J. Neurophysiol. 95, 379-400.
Abstract, related presentations, code, erratum, and download
Purpura, K.P., Kalik, S., and Schiff, N.D. (2003)
Analysis of perisaccadic field potentials in the occipitotemporal pathway during active vision.
J. Neurophysiol. 90, 3455-3478.
Abstract and download
Schiff, N.D and Purpura, K.P. (2002)
Towards a neurophysiological foundation for cognitive neuromodulation
through deep brain stimulation.
Thalamus and Related Systems 2, 55-69.
Abstract and download
Levine, B.K., Beason-Held, L.L., Purpura, K.P., Aronchick, D.M., Optican, L.M.,Alexander, G.E., Horwitz, B., Rapoport, S.I., and Schapiro, M.B. (2000)
Age-related differences in visual perception: a PET study.
Neurobiology of Aging 21, 577-584.
Abstract and download
Reich, D.S., Mechler, F., Purpura, K.P., and Victor, J.D. (2000)
Interspike intervals, receptive fields, and
information encoding in primary visual cortex. J. Neurosci. 20, 1964-1974.
Abstract and downloads
Victor, J.D., and Purpura, K.P. (1999)
Estimation of information in neuronal responses.
Trends in Neurosciences 22, 543.
Text and references
Schiff, N.D., Purpura, K.P., and Victor, J.D. (1999)
Gating of local network signals appears as stimulus-dependent activity
envelopes in striate cortex.
J. Neurophysiol. 82, 2182-2196.
Abstract, key figure, and downloads
Beason-Held, L.L., Purpura, K.P., Krasuski, J.S., Maisog, J.Ma., Daly,
E.M., Mangot, D.J., Desmond, R.E., Optican, L.M., Schapiro, M.B. and Van Meter, J.W. (1998) Cortical regions involved in texture perception: a fMRI
study. Cognitive Brain Research 7, 111-118.
Abstract and download
Mechler, F., Victor, J.D., Purpura, K.P., and Shapley, R. (1998) Robust
temporal coding of contrast by V1 neurons for transient but not steady-state
stimuli. J. Neurosci. 18, 6583-6598.
Abstract and downloads
Victor, J.D., and Purpura, K.P. (1998) Spatial phase and the temporal
structure of the response to gratings in V1. J. Neurophysiol. 80, 554-571.
Abstract and downloads
Beason-Held, L.L., Purpura, K.P., Van Meter, J.W., Azari, N.P., Mangot,
D.J., Optican, L.M., Mentis, M.J., Alexander, G.E., Grady, C.L., Horwitz,
B., Rapoport, S.I., and Schapiro, M.B. (1998) PET reveals occipitotemporal
pathway activation during elementary form perception in humans. Visual
Neuroscience 15, 503-510.
Abstract and download
Victor, J.D., Purpura, K.P., and Conte, M.M. (1998) Chromatic and luminance
interactions in spatial contrast signals. Visual Neuroscience 15, 607-624.
Abstract, key figure, and download
Purpura, K.P., and Schiff, N.D. (1997) The thalamic intralaminar nuclei:
A role in visual awareness. The Neuroscientist 3, 8-15.
Abstract and download
Victor, J.D., and Purpura, K.P. (1997) Sensory coding in cortical neurons:
recent results and speculations. In: Frontiers of Neurology: A Symposium
in Honor of Fred Plum. Annals of the New York Academy of Sciences 835,
330-352.
Abstract and key figures
Victor, J.D., and Purpura, K. (1997) Metric-space analysis of spike
trains: theory, algorithms, and application. Network 8, 127-164.
Abstract, code, and downloads
Victor, J.D., Conte, M.M., and Purpura, K.P. (1997) Dynamic shifts of
the contrast-response function. Visual Neuroscience 14, 577-587.
Abstract
Victor, J.D., and Purpura, K. (1996) Nature and precision of temporal
coding in visual cortex: a metric-space analysis. J. Neurophysiol. 76,
1310-1326.
Summary, key figure, code, and downloads
Victor, J.D., Conte, M.M., Purpura, K., and Katz, E. (1995) Isodipole
textures: a window on cortical mechanisms of form processing. In Early
Vision and Beyond. eds. T. Papathomas, C. Chubb, A. Gorea, E. Kowler. Cambridge,
The MIT Press. pp. 99 - 107.
Abstract, summary, and key figure
Victor, J.D., Purpura, K., Katz, E., and Mao, B. (1994) Population encoding
of spatial frequency, orientation, and color in macaque V1. J. Neurophysiol.
72, 2151-2166.
Summary, key figure, and downloads
Purpura, K., Victor, J.D., and Katz, E. (1994) Striate cortex extracts
higher-order spatial correlations from visual textures. Proc. Natl. Acad.
Sci. USA 91, 8482-8486.
Abstract and download
Shapley, R., Kaplan, E., and Purpura, K. (1993)
Contrast sensitivity and light adaptation in photoreceptors or in the retinal network.
In: Contrast Sensitivity, R. Shapley and D. M-K Lam, eds., pp 103-116, MIT Press, Cambridge, MA.
Introduction and download