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Periklis Y Ktonas

TitleProfessor Emeritus
InstitutionUniversity of Houston
DepartmentElectrical Engineering
Address4800 Calhoun Rd
Houston TX 77004
Phone713-743-4400
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    R01HL037944     (KTONAS, PERIKLIS Y)Aug 1, 1986 - Apr 30, 1990
    NIH/NHLBI
    CONTEXT-BASED AUTOMATED DETECTION OF ABNORMAL EEG WAVES
    Role: Principal Investigator

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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Korda AI, Koliaraki M, Asvestas PA, Matsopoulos GK, Ventouras EM, Ktonas PY, Smyrnis N. Discrete states of attention during active visual fixation revealed by Markovian analysis of the time series of intrusive saccades. Neuroscience. 2016 Dec 17; 339:385-395. PMID: 27751962.
      View in: PubMed
    2. Maestri M, Carnicelli L, Tognoni G, Di Coscio E, Giorgi FS, Volpi L, Economou NT, Ktonas P, Ferri R, Bonuccelli U, Bonanni E. Non-rapid eye movement sleep instability in mild cognitive impairment: a pilot study. Sleep Med. 2015 Sep; 16(9):1139-45. PMID: 26298791.
      View in: PubMed
    3. Tsekou H, Angelopoulos E, Paparrigopoulos T, Golemati S, Soldatos CR, Papadimitriou GN, Ktonas PY. Sleep EEG and spindle characteristics after combination treatment with clozapine in drug-resistant schizophrenia: a pilot study. J Clin Neurophysiol. 2015 Apr; 32(2):159-63. PMID: 25350635.
      View in: PubMed
    4. Ktonas PY, Ventouras EC. Automated detection of sleep spindles in the scalp EEG and estimation of their intracranial current sources: comments on techniques and on related experimental and clinical studies. Front Hum Neurosci. 2014; 8:998. PMID: 25540616; PMCID: PMC4261733.
      View in: PubMed, PubMed Central
    5. Ventouras EC, Margariti A, Chondraki P, Kalatzis I, Economou NT, Tsekou H, Paparrigopoulos T, Ktonas P. EEG-based investigation of brain connectivity changes in psychotic patients undergoing the primitive expression form of dance therapy: a methodological pilot study. Cogn Neurodyn. 2015 Apr; 9(2):231-48. PMID: 25852781; PMCID: PMC4378579.
      View in: PubMed, PubMed Central
    6. Bonakis A, Economou NT, Paparrigopoulos T, Bonanni E, Maestri M, Carnicelli L, Di Coscio E, Ktonas P, Vagiakis E, Theodoropoulos P, Papageorgiou SG. Sleep in frontotemporal dementia is equally or possibly more disrupted, and at an earlier stage, when compared to sleep in Alzheimer's disease. J Alzheimers Dis. 2014; 38(1):85-91. PMID: 24077430.
      View in: PubMed
    7. Ventouras EM, Panagi M, Tsekou H, Paparrigopoulos TJ, Ktonas PY. Amplitude normalization applied to an artificial neural network-based automatic sleep spindle detection system. Conf Proc IEEE Eng Med Biol Soc. 2014; 2014:3240-3. PMID: 25570681.
      View in: PubMed
    8. Angelakis E, Liouta E, Andreadis N, Korfias S, Ktonas P, Stranjalis G, Sakas DE. Transcranial direct current stimulation effects in disorders of consciousness. Arch Phys Med Rehabil. 2014 Feb; 95(2):283-9. PMID: 24035769.
      View in: PubMed
    9. Ktonas PY, Penzel T, Ruffini G. Guest editorial: Special issue on noninvasive electromagnetic brain stimulation. IEEE Trans Neural Syst Rehabil Eng. 2013 May; 21(3):331-2. PMID: 23819143.
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    10. Angelakis E, Liouta E, Andreadis N, Leonardos A, Ktonas P, Stavrinou LC, Miranda PC, Mekonnen A, Sakas DE. Transcranial alternating current stimulation reduces symptoms in intractable idiopathic cervical dystonia: a case study. Neurosci Lett. 2013 Jan 15; 533:39-43. PMID: 23149130.
      View in: PubMed
    11. Bonanni E, Di Coscio E, Maestri M, Carnicelli L, Tsekou H, Economou NT, Paparrigopoulos T, Bonakis A, Papageorgiou SG, Vassilopoulos D, Soldatos CR, Murri L, Ktonas PY. Differences in EEG delta frequency characteristics and patterns in slow-wave sleep between dementia patients and controls: a pilot study. J Clin Neurophysiol. 2012 Feb; 29(1):50-4. PMID: 22353985.
      View in: PubMed
    12. Ventouras EM, Economou NT, Kritikou I, Tsekou H, Paparrigopoulos TJ, Ktonas PY. Performance evaluation of an Artificial Neural Network automatic spindle detection system. Conf Proc IEEE Eng Med Biol Soc. 2012; 2012:4328-31. PMID: 23366885.
      View in: PubMed
    13. Smyrnis N, Mylonas DS, Rezaie R, Siettos CI, Ventouras E, Ktonas PY, Evdokimidis I, Papanicolaou AC. Single-trial magnetoencephalography signals encoded as an unfolding decision process. Neuroimage. 2012 Feb 15; 59(4):3604-10. PMID: 22079506.
      View in: PubMed
    14. Polychronaki GE, Ktonas PY, Gatzonis S, Siatouni A, Asvestas PA, Tsekou H, Sakas D, Nikita KS. Comparison of fractal dimension estimation algorithms for epileptic seizure onset detection. J Neural Eng. 2010 Aug; 7(4):046007. PMID: 20571184.
      View in: PubMed
    15. Ventouras EM, Ktonas PY, Tsekou H, Paparrigopoulos T, Kalatzis I, Soldatos CR. Independent component analysis for source localization of EEG sleep spindle components. Comput Intell Neurosci. 2010; 329436. PMID: 20369057; PMCID: PMC2847376.
      View in: PubMed, PubMed Central
    16. Ktonas PY, Golemati S, Xanthopoulos P, Sakkalis V, Ortigueira MD, Tsekou H, Zervakis M, Paparrigopoulos T, Bonakis A, Economou NT, Theodoropoulos P, Papageorgiou SG, Vassilopoulos D, Soldatos CR. Time-frequency analysis methods to quantify the time-varying microstructure of sleep EEG spindles: possibility for dementia biomarkers? J Neurosci Methods. 2009 Dec 15; 185(1):133-42. PMID: 19747507.
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    17. Mitra J, Glover JR, Ktonas PY, Thitai Kumar A, Mukherjee A, Karayiannis NB, Frost JD, Hrachovy RA, Mizrahi EM. A multistage system for the automated detection of epileptic seizures in neonatal electroencephalography. J Clin Neurophysiol. 2009 Aug; 26(4):218-26. PMID: 19602985; PMCID: PMC2760540.
      View in: PubMed, PubMed Central
    18. Ferentinos P, Kontaxakis V, Havaki-Kontaxaki B, Paparrigopoulos T, Dikeos D, Ktonas P, Soldatos C. Sleep disturbances in relation to fatigue in major depression. J Psychosom Res. 2009 Jan; 66(1):37-42. PMID: 19073291.
      View in: PubMed
    19. Ventouras EM, Alevizos I, Ktonas PY, Tsekou H, Paparrigopoulos T, Kalatzis I, Soldatos CR, Nikiforidis G. Independent components of sleep spindles. Conf Proc IEEE Eng Med Biol Soc. 2007; 2007:4002-5. PMID: 18002877.
      View in: PubMed
    20. Ktonas PY, Golemati S, Xanthopoulos P, Sakkalis V, Ortigueira MD, Tsekou H, Zervakis M, Paparrigopoulos T, Soldatos CR. Potential dementia biomarkers based on the time-varying microstructure of sleep EEG spindles. Conf Proc IEEE Eng Med Biol Soc. 2007; 2007:2464-7. PMID: 18002493.
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    21. Karayiannis NB, Mukherjee A, Glover JR, Ktonas PY, Frost JD, Hrachovy RA, Mizrahi EM. Detection of pseudosinusoidal epileptic seizure segments in the neonatal EEG by cascading a rule-based algorithm with a neural network. IEEE Trans Biomed Eng. 2006 Apr; 53(4):633-41. PMID: 16602569.
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    22. Xanthopoulos P, Golemati S, Sakkalis V, Ktonas PY, Zervakis M, Soldatos CR. Modeling the time-varying microstructure of simulated sleep EEG spindles using time-frequency analysis methods. Conf Proc IEEE Eng Med Biol Soc. 2006; 1:2438-41. PMID: 17945715.
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    23. Ventouras EM, Monoyiou EA, Ktonas PY, Paparrigopoulos T, Dikeos DG, Uzunoglu NK, Soldatos CR. Sleep spindle detection using artificial neural networks trained with filtered time-domain EEG: a feasibility study. Comput Methods Programs Biomed. 2005 Jun; 78(3):191-207. PMID: 15899305.
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    24. Mitra J, Glover J, Ktonas P, Frost J, Hrachovy R, Mizrahi E. Rule-enhanced Clustering in the Detection of Neonatal Seizures. Conf Proc IEEE Eng Med Biol Soc. 2005; 1:948-51. PMID: 17282341.
      View in: PubMed
    25. Karayiannis NB, Mukherjee A, Glover JR, Ktonas PY, Frost JD, Hrachovy RA, Mizrahi EM. Quantifying and visualizing uncertainty in EEG data of neonatal seizures. Conf Proc IEEE Eng Med Biol Soc. 2004; 1:423-6. PMID: 17271702.
      View in: PubMed
    26. Ktonas P, Nygren A, Frost J. Two-minute rapid eye movement (REM) density fluctuations in human REM sleep. Neurosci Lett. 2003 Dec 26; 353(3):161-4. PMID: 14665406.
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    27. Vegni C, Ktonas P, Giganti F, Ficca G, Trammell J, Gori S, Salzarulo P. The organization of rapid eye movement activity during rapid eye movement sleep is further impaired in very old human subjects. Neurosci Lett. 2001 Jan 05; 297(1):58-60. PMID: 11114484.
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    28. Ktonas PY, Paparrigopoulos T, Monoyiou EA, Bergiannaki JD, Soldatos CR. Sleep spindle incidence dynamics: a pilot study based on a Markovian analysis. Sleep. 2000 May 01; 23(3):419-23. PMID: 10811387.
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    29. Ficca G, Gori S, Ktonas P, Quattrini C, Trammell J, Salzarulo P. The organization of rapid eye movement activity during rapid eye movement sleep is impaired in the elderly. Neurosci Lett. 1999 Nov 19; 275(3):219-21. PMID: 10580714.
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    30. Fagioli I, Ktonas P, Salzarulo P. Delta (0.5-1.5 Hz) and sigma (11.5-15.5 Hz) EEG power dynamics throughout quiet sleep in malnourished infants. Dev Psychobiol. 1999 May; 34(4):315-23. PMID: 10331155.
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    31. Ramabhadran B, Frost JD, Glover JR, Ktonas PY. An automated system for epileptogenic focus localization in the electroencephalogram. J Clin Neurophysiol. 1999 Jan; 16(1):59-68. PMID: 10082093.
      View in: PubMed
    32. Ktonas PY. Computer-based recognition of EEG patterns. Electroencephalogr Clin Neurophysiol Suppl. 1996; 45:23-35. PMID: 8930513.
      View in: PubMed
    33. Ktonas PY, Fagioli I, Salzarulo P. Delta (0.5-1.5 Hz) and sigma (11.5-15.5 Hz) EEG power dynamics throughout quiet sleep in infants. Electroencephalogr Clin Neurophysiol. 1995 Aug; 95(2):90-6. PMID: 7649010.
      View in: PubMed
    34. Ktonas PY, Mallart R. Estimation of time delay between EEG signals for epileptic focus localization: statistical error considerations. Electroencephalogr Clin Neurophysiol. 1991 Feb; 78(2):105-10. PMID: 1704832.
      View in: PubMed
    35. Ktonas PY, Bes FW, Rigoard MT, Wong C, Mallart R, Salzarulo P. Developmental changes in the clustering pattern of sleep rapid eye movement activity during the first year of life: a Markov-process approach. Electroencephalogr Clin Neurophysiol. 1990 Mar; 75(3):136-40. PMID: 1689636.
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    36. Glover JR, Ktonas PY, Jansen BH. Knowledge-based interpretation of bioelectrical signals. IEEE Eng Med Biol Mag. 1990; 9(1):51-4. PMID: 18238319.
      View in: PubMed
    37. Glover JR, Raghavan N, Ktonas PY, Frost JD. Context-based automated detection of epileptogenic sharp transients in the EEG: elimination of false positives. IEEE Trans Biomed Eng. 1989 May; 36(5):519-27. PMID: 2498200.
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    38. Boukadoum AM, Ktonas PY. Non-random patterns of REM occurrences during REM sleep in normal human subjects: an automated second-order study using Markovian modeling. Electroencephalogr Clin Neurophysiol. 1988 Nov; 70(5):404-16. PMID: 2460314.
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    39. Ktonas PY. Period-amplitude EEG analysis. Sleep. 1987 Dec; 10(6):505-7. PMID: 3432852.
      View in: PubMed
    40. Glover JR, Ktonas PY, Raghavan N, Uruñuela JM, Velamuri SS, Reilly EL. A multichannel signal processor for the detection of epileptogenic sharp transients in the EEG. IEEE Trans Biomed Eng. 1986 Dec; 33(12):1121-8. PMID: 3817843.
      View in: PubMed
    41. Boukadoum AM, Ktonas PY. EOG-based recording and automated detection of sleep rapid eye movements: a critical review, and some recommendations. Psychophysiology. 1986 Sep; 23(5):598-611. PMID: 3543986.
      View in: PubMed
    42. Okyere JG, Ktonas PY, Meyer JS. Quantification of the alpha EEG modulation and its relation to cerebral blood flow. IEEE Trans Biomed Eng. 1986 Jul; 33(7):690-6. PMID: 3733126.
      View in: PubMed
    43. Ktonas PY. Automated analysis of abnormal electroencephalograms. Crit Rev Biomed Eng. 1983; 9(1):39-97. PMID: 6340959.
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    44. Ktonas PY, Luoh WM, Kejariwal ML, Reilly EL, Seward MA. Computer-aided quantification of EEG spike and sharp wave characteristics. Electroencephalogr Clin Neurophysiol. 1981 Mar; 51(3):237-43. PMID: 6163612.
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    45. Ktonas PY, Gosalia AP. Spectral analysis vs. period-amplitude analysis of narrowband EEG activity: a comparison based on the sleep delta-frequency band. Sleep. 1981; 4(2):193-206. PMID: 7256080.
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    46. Ktonas PY, Bonilla JF, Boukadoum AM. Quantification of time-connectivity patterns in rapid eye movement occurrences during sleep. IEEE Trans Biomed Eng. 1981 Jan; 28(1):31-6. PMID: 7228066.
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    47. Ktonas PY, Osorio PL, Everett RL. Automated detection of EEG artifacts during sleep: preprocessing for all-night spectral analysis. Electroencephalogr Clin Neurophysiol. 1979 Apr; 46(4):382-8. PMID: 85534.
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    48. Ktonas PY, Smith JR. Automatic REM detection: modifications on an existing system and preliminary normative data. Int J Biomed Comput. 1978 Nov; 9(6):445-64. PMID: 216637.
      View in: PubMed
    49. Papp N, Ktonas P. Critical evaluation of complex demodulation techniques for the quantification of bioelectrical activity. Biomed Sci Instrum. 1977 Apr 25-27; 13:135-45. PMID: 871500.
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    50. Ktonas PY, Smith JR. Semi-automatic analysis of rapid eye movement (REM) patterns: a software package. Comput Biomed Res. 1976 Apr; 9(2):109-24. PMID: 178477.
      View in: PubMed
    51. Ktonas P, Weintraub B, Smith J, Black FO. Computer aided nystagmus analysis. Comput Programs Biomed. 1975 Dec; 5(2):153-7. PMID: 1104250.
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    52. Ktonas PY, Black FO, Smith JR. Effect of electronic filters on electronystagmographic recordings. Arch Otolaryngol. 1975 Jul; 101(7):413-7. PMID: 1147824.
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    53. Ktonas PY, Smith JR. Quantification of abnormal EEG spike characteristics. Comput Biol Med. 1974 Dec; 4(2):157-63. PMID: 4455435.
      View in: PubMed
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