N Smyrnis

Summary

Affiliation: University of Athens
Country: Greece

Publications

  1. ncbi request reprint A systematic directional error in 2-D arm movements increases with increasing delay between visual target presentation and movement execution
    N Smyrnis
    Neurology Department, National University of Athens, Eginition Hospital, Greece
    Exp Brain Res 131:111-20. 2000
  2. ncbi request reprint Speed-accuracy trade-off in the performance of pointing movements in different directions in two-dimensional space
    N Smyrnis
    Neurology Department, National University of Athens, Medical School, Aeginition Hospital, Greece
    Exp Brain Res 134:21-31. 2000
  3. ncbi request reprint An early transient 40 Hz activity discriminates a following pro-saccade from a no-move and anti-saccade choice
    N Smyrnis
    University Mental Health Research Institute, National University of Athens, Greece
    Exp Brain Res 139:287-96. 2001
  4. ncbi request reprint The antisaccade task in a sample of 2,006 young males. II. Effects of task parameters
    N Smyrnis
    University Mental Health Research Institute, National University of Athens, Athens, Greece
    Exp Brain Res 147:53-63. 2002
  5. ncbi request reprint Frontal-parietal activation differences observed before the execution of remembered saccades: an event-related potentials study
    I Evdokimidis
    Cognition Action Group, Neurology Department, National University of Athens Medical School, Aeginitio Hospital, Vas Sofias 72 74, Athens GR 11528, Greece
    Brain Res Cogn Brain Res 12:89-99. 2001
  6. ncbi request reprint Systematic errors of planar arm movements provide evidence for space categorization effects and interaction of multiple frames of reference
    P Gourtzelidis
    Neurology Department, National University of Athens, Aeginition Hospital, Greece
    Exp Brain Res 139:59-69. 2001
  7. ncbi request reprint Active eye fixation performance in 940 young men: effects of IQ, schizotypy, anxiety and depression
    N Smyrnis
    Psychiatry Department, National University of Athens, Aeginition Hospital, 72 Vas Sofias Ave, 11528, Athens, Greece
    Exp Brain Res 156:1-10. 2004
  8. ncbi request reprint The antisaccade task in a sample of 2,006 young men. I. Normal population characteristics
    I Evdokimidis
    Cognition and Action Group, National University of Athens, Neurology Clinic, Aeginition Hospital, 72 Vas Sofias Ave, Athens 11528, Greece
    Exp Brain Res 147:45-52. 2002
  9. ncbi request reprint Effects of direction on saccadic performance in relation to lateral preferences
    T S Constantinidis
    University Mental Health Research Institute, National University of Athens, Athens, Greece
    Exp Brain Res 150:443-8. 2003
  10. doi request reprint Schizophrenia-related RGS4 gene variations specifically disrupt prefrontal control of saccadic eye movements
    E Kattoulas
    Kapodistrian University of Athens, Athens, Greece
    Psychol Med 42:757-67. 2012

Collaborators

  • I Evdokimidis
  • A Serretti
  • N C Stefanis
  • D Avramopoulos
  • E Kattoulas
  • M I V Kontaxaki
  • C N Stefanis
  • T S Constantinidis
  • P Gourtzelidis
  • L Mandelli
  • L Zaninotto
  • A Hatzimanolis
  • I Giouzelis
  • I Hantoumi
  • A Balogh

Detail Information

Publications13

  1. ncbi request reprint A systematic directional error in 2-D arm movements increases with increasing delay between visual target presentation and movement execution
    N Smyrnis
    Neurology Department, National University of Athens, Eginition Hospital, Greece
    Exp Brain Res 131:111-20. 2000
    ..It is further proposed that the directional bias observed at the vicinity of the target might reflect a loss of cortical directional information with increasing delay between target presentation and movement onset...
  2. ncbi request reprint Speed-accuracy trade-off in the performance of pointing movements in different directions in two-dimensional space
    N Smyrnis
    Neurology Department, National University of Athens, Medical School, Aeginition Hospital, Greece
    Exp Brain Res 134:21-31. 2000
    ..Thus a clear segmentation of movement execution in two phases is supported by these results. The implications of these results for theoretical models of speed-accuracy trade-off are discussed...
  3. ncbi request reprint An early transient 40 Hz activity discriminates a following pro-saccade from a no-move and anti-saccade choice
    N Smyrnis
    University Mental Health Research Institute, National University of Athens, Greece
    Exp Brain Res 139:287-96. 2001
    ..We conclude that this task specific transient oscillatory activity could be used as a probe in the study of the temporal dynamics of visuomotor transformations...
  4. ncbi request reprint The antisaccade task in a sample of 2,006 young males. II. Effects of task parameters
    N Smyrnis
    University Mental Health Research Institute, National University of Athens, Athens, Greece
    Exp Brain Res 147:53-63. 2002
    ..In particular, the smaller this latency was, the higher the probability of an error. These findings are discussed in light of current hypotheses on antisaccade production mechanisms involving mainly the superior colliculus...
  5. ncbi request reprint Frontal-parietal activation differences observed before the execution of remembered saccades: an event-related potentials study
    I Evdokimidis
    Cognition Action Group, Neurology Department, National University of Athens Medical School, Aeginitio Hospital, Vas Sofias 72 74, Athens GR 11528, Greece
    Brain Res Cogn Brain Res 12:89-99. 2001
    ..This specific activation pattern of frontal and parietal areas, observed for the MEM task only, requires further investigation focusing on the temporal pattern of activation of large brain areas involved in working memory processing...
  6. ncbi request reprint Systematic errors of planar arm movements provide evidence for space categorization effects and interaction of multiple frames of reference
    P Gourtzelidis
    Neurology Department, National University of Athens, Aeginition Hospital, Greece
    Exp Brain Res 139:59-69. 2001
    ..The presence of the stable visual cue may impose an additional cue-centered (allocentric) reference frame...
  7. ncbi request reprint Active eye fixation performance in 940 young men: effects of IQ, schizotypy, anxiety and depression
    N Smyrnis
    Psychiatry Department, National University of Athens, Aeginition Hospital, 72 Vas Sofias Ave, 11528, Athens, Greece
    Exp Brain Res 156:1-10. 2004
    ..A connection of such a difficulty with the frontal lobes and their role in the control of voluntary inhibitory functions is discussed...
  8. ncbi request reprint The antisaccade task in a sample of 2,006 young men. I. Normal population characteristics
    I Evdokimidis
    Cognition and Action Group, National University of Athens, Neurology Clinic, Aeginition Hospital, 72 Vas Sofias Ave, Athens 11528, Greece
    Exp Brain Res 147:45-52. 2002
    ..This report offers an analysis of the interindividual variation in the performance of the antisaccade task and discusses some of the sources of this variation...
  9. ncbi request reprint Effects of direction on saccadic performance in relation to lateral preferences
    T S Constantinidis
    University Mental Health Research Institute, National University of Athens, Athens, Greece
    Exp Brain Res 150:443-8. 2003
    ..Other oculomotor tasks might be more sensitive to hemifield differences, or cerebral hemispheric asymmetry is not present at the level of cortical organization of saccades and antisaccades...
  10. doi request reprint Schizophrenia-related RGS4 gene variations specifically disrupt prefrontal control of saccadic eye movements
    E Kattoulas
    Kapodistrian University of Athens, Athens, Greece
    Psychol Med 42:757-67. 2012
    ....
  11. doi request reprint Serotonin transporter gene variants and prediction of stress-induced risk for psychological distress
    N C Stefanis
    University Mental Health Research Institute, Athens, Greece
    Genes Brain Behav 10:536-41. 2011
    ..In particular, variation within this gene may confer risk for paranoid/defensive reactions under conditions of environmental stress associated with military induction...
  12. ncbi request reprint Cognitive impairments and psychopathological parameters in patients of the schizophrenic spectrum
    M I V Kontaxaki
    1st Department of Psychiatry, Medical School, University of Athens, Athens, Greece
    Psychiatriki 25:27-38. 2014
    ..053), inappropriate affect and declarative face memory ("FMT test", p = 0.056), and psychomotor ability and poor speech (p = 0.086)...
  13. ncbi request reprint Higher scores of self reported schizotypy in healthy young males carrying the COMT high activity allele
    D Avramopoulos
    University Mental Health Research Institute, Argyrocastrou and Ionias St, Papagou, Athens 15669, Greece
    Mol Psychiatry 7:706-11. 2002
    ..This finding is in the same direction as reported findings on schizophrenia and it adds to the list of evidence that COMT or a nearby gene in linkage disequilibrium is involved in the pathogenesis of the disease...