Publications and Presentations

Senior Fellowship

[28][S2] Murty DVPS, Manikandan K, Kumar WS, Ramesh RG, Purokayastha S, Javali M, Rao NP, Ray S (2020). Gamma oscillations weaken with age in healthy elderly in human EEG. Neuroimage, Vol 215, Article 116826

[27][S1] Salelkar S and Ray S (2020) Interaction between steady-state visually evoked potentials at nearby flicker frequencies. Scientific Reports. 10:5344


Intermediate Fellowship

[26][I18] Dubey A and Ray S (2020) Comparison of tuning properties of gamma and high-gamma power in local field potential (LFP) versus electrocorticogram (ECoG) in visual cortex. Scientific Reports. 10:5422

[25][I17] Kanth ST and Ray S (2020) Electrocorticogram (ECoG) is highly informative in primate visual cortex. Journal of Neuroscience. 40(12):2430-2444

[24][I16] Biswas A and Ray S (2019) Alpha neurofeedback has a positive effect for participants who are unable to sustain their alpha activity. eNeuro. 6(4):ENEURO.0498-18.2019.

[23][I15] Dubey A and Ray S (2019) Cortical electrocorticogram (ECoG) is a local signal. Journal of Neuroscience. 39(22):4299-4311

[22][I14] Das A and Ray S (2018). Effect of stimulus contrast and visual attention on spike-gamma phase relationship in macaque primary visual cortex. Frontiers in Computational Neuroscience. August 14, Vol 12, Article 66.

[21][I13] Salelkar S, Somasekhar GM, and Ray S (2018). Distinct frequency bands in the local field potential are differently tuned to stimulus drift rate. Journal of Neurophysiology, 120(2):681-692

[20][I12] Shirhatti V and Ray S (2018). Long wavelength (reddish) hues induce unusually large gamma oscillations in the primate primary visual cortex. PNAS. 115(17) 4489-4494.

[19][I11] Murty DVPS#, Shirhatti V#, Ravishankar P# and Ray S (2018). Large visual stimuli induce two distinct gamma oscillations in primate visual cortex. Journal of Neuroscience. 38(11):2730-44 (* indicates joint first author).

[18][I10] Subhash Chandran KS, Seelamantula CS, and Ray S (2018). Duration Analysis Using Matching Pursuit Algorithm Reveals Longer Bouts of Gamma Rhythm. Journal of Neurophysiology. 119(3): 808-821.

[17*][I9] Biswas A and Ray S (2017). Control of alpha rhythm (8-13 Hz) using neurofeedback. Journal of the Indian Institute of Science. Vol 97:4: 527-531.

[16][I8] Dubey A and Ray S (2016). Spatial spread of local field potential is band-pass in the primary visual cortex. Journal of Neurophysiology. Oct 1; 116(4): 1986-99.

[15][I7] Shirhatti V, Borthakur A, and Ray S (2016). Effect of Reference Scheme on Power and Phase of the Local Field Potential. Neural Computation. Vol 28, No. 5: 882-913.

[14*][I6]    Subhash Chandran K S, Mishra A#, Shirhatti V# and Ray S (2016). Comparison of Matching Pursuit algorithm with other signal processing techniques for computation of the time-frequency power spectrum of brain signals. Journal of Neuroscience. March 23; 36(12): 3399-3408.

[13*][I5]    Ray S (2015) Challenges in the quantification and interpretation of spike-LFP relationships. Current Opinion in Neurobiology. April 30; 31: 111-118.

[12*][I4]    Ray S and Maunsell, JHR (2015). Do gamma oscillations play a role in cerebral cortex? Trends in Cognitive Sciences. Vol. 19(2): 78-85.

[11][I3]      Srinath R and Ray S (2014) Effect of Amplitude Correlations on Coherence in the Local Field Potential. Journal of Neurophysiol. Aug 15; 112(4):741-51.

[10][I2]      Ray S, Ni AM and Maunsell JHR (2013). Strength of Gamma Rhythm depends on Normalization. PLoS Biology. 11(2):e1001477.

[9][I1]        Ni AM, Ray S and Maunsell JHR (2012) Tuned Normalization Explains the Size of Attention Modulations. Neuron. Feb 23; 73(4): 803-813


Postdoctoral Work

[8]        Ray S and Maunsell JHR (2011) Network rhythms influence the relationship between spike-triggered local field potential and functional connectivity. Journal of Neuroscience. Aug 31; 31(35):12674-82

[7]        Ray S and Maunsell JHR (2011) Different origins of gamma rhythm and high-gamma activity in macaque visual cortex. PLoS Biology. Apr; 9(4):e1000610.

[6]        Ray S and Maunsell JHR (2010) Differences in gamma frequencies across visual cortex restrict their possible use in computation. Neuron. Sep 9; 67:885-896


PhD Work

[5]        Ray S, Crone NE, Niebur E, Franaszczuk PJ and Hsiao SS (2008) Neural correlates of high-gamma oscillations (60-200 Hz) in macaque local field potentials and their potential implications in electrocorticography. Journal of Neuroscience. Nov 5; 28(45): 11526-36.

[4]        Ray S, Hsiao SS, Crone NE, Franaszczuk PJ and Niebur E (2008) Effect of stimulus intensity on the spike-local field potential relationship in the secondary somatosensory cortex. Journal of Neuroscience. Jul 16; 28(29): 7334-43

[3]        Ray S, Niebur E, Hsiao SS, Sinai A and Crone NE (2008) High-frequency gamma activity (80-150 Hz) is increased in human cortex during selective attention. Clinical Neurophysiology. Jan; 119(1):116-33.

[2]       Muniak MA, Ray S, Hsiao SS, Dammann JF, Bensmaia SJ (2007) The neural coding of stimulus intensity: linking the population response of mechanoreceptive afferents with psychophysical behavior. Journal of Neuroscience. Oct 24; 27(43):11687-99.

[1]       Ray S, Jouny CC, Crone NE, Boatman D, Thakor NV, Franaszczuk PJ (2003) Human ECoG analysis during speech perception using matching pursuit: a comparison between stochastic and dyadic dictionaries. IEEE Transactions in Biomedical Engineering. 50:1371-1373.