Research Topics
| T RuusuvirtaSummaryAffiliation: University of Helsinki Country: Finland Publications
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Detail Information
Publications
The human brain processes repeated auditory feature conjunctions of low sequential probabilityTimo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, P O Box 9, University of Helsinki, 00014 Helsinki, Finland
Neurosci Lett 355:97-100. 2004..Differential scalp-recorded event-related potentials to deviants indicate that the standard variants were traced as repeated wholes despite their preperceptual distinctiveness and resulting rarity among one another...- The fast detection of rare auditory feature conjunctions in the human brain as revealed by cortical gamma-band electroencephalogramT Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, Siltavuorenpenger 20 C, P O Box 9, University of Helsinki, 00014 Helsinki, Finland
Neuroscience 130:91-4. 2005..Our finding suggests that, perhaps with the support of its non-phase-locked synchrony in the gamma band, the human brain is able to detect rare sounds as feature conjunctions very rapidly... - Newborn human brain identifies repeated auditory feature conjunctions of low sequential probabilityTimo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, PO Box 9, FIN 00014 University of Helsinki, Helsinki, Finland
Eur J Neurosci 20:2819-21. 2004..This finding suggests that humans are relatively hard-wired to preattentively identify repeated auditory feature conjunctions even when such conjunctions occur rarely among other similar ones... - The newborn human brain binds sound features togetherTimo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, PO Box 9, FIN 00014 University of Helsinki, Helsinki
Neuroreport 14:2117-9. 2003..Our finding suggests that the human brain is ready for auditory feature binding very soon after birth... - From spatial acoustic changes to attentive behavioral responses within 200 ms in humansT Ruusuvirta
Department of Psychology, University of Jyvaskyla, Finland
Neurosci Lett 275:49-52. 1999..The results are discussed in the context of endogenous ERPs and of attentive processes across sensory modalities... - Mismatch negativity for item rather than serial-order information in a 150-ms tone series that is not repeated as a melodic patternT Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, P O Box 9, Siltavuorenpenger 20C, 00014 University of Helsinki, Helsinki, Finland
Neuroscience 147:968-73. 2007..MMN generation in the human brain thus seems to be based on item rather than serial-order information in a rapid spectro-temporal pattern of acoustic signals that is not repeated frequently in the short term... - ERP and EOG responses elicited by deviant tones when presented with and without standard tones to reading subjectsT Ruusuvirta
Department of Psychology, University of Jyvaskyla, Jyvaskyla, Finland
Int J Psychophysiol 42:279-86. 2001..The results suggest that reading is a sufficiently demanding task to enable the subject to effectively ignore the oddball-deviants but not the alone-deviants... 
Dose-related effects of memantine on a mismatch negativity-like response in anesthetized ratsD Tikhonravov
Neuroscience Unit, Institute of Biomedicine Physiology, University of Helsinki, Helsinki, Finland
Neuroscience 167:1175-82. 2010..The high dose of memantine, in contrast, blocked the generation of the auditory MMN-like response. The findings suggest that memantine may, with appropriate doses, facilitate already this early stage of auditory processing...- Processing of melodic contours in urethane-anaesthetized ratsTimo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, PO Box 9, 00014 University of Helsinki, Helsinki, Finland
Eur J Neurosci 26:701-3. 2007.... - Mismatch negativity reflects numbers of tones of specific frequencies in humansTimo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, P O Box 13, University of Helsinki, 00014 Helsinki, Finland
Neurosci Lett 436:138-40. 2008.... - Visual mismatch negativity for changes in orientation--a sensory memory-dependent responsePiia Astikainen
Department of Psychology, University of Jyvaskyla, PO Box 35, 40014 Jyvaskyla, Finland
Eur J Neurosci 28:2319-24. 2008..The findings also pave the way for the future exploration of both intact and impaired memory-based visual processing and memory capacity... - Numerical discrimination in newborn infants as revealed by event-related potentials to tone sequencesTimo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Helsinki, Finland
Eur J Neurosci 30:1620-4. 2009..The findings suggest very early sensitivity to auditory numerical information in infancy... - Preperceptual human number sense for sequential sounds, as revealed by mismatch negativity brain response?Timo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Helsinki, Finland
Cereb Cortex 17:2777-9. 2007..4:0), suggesting some ability of the human brain to operate on the number of sequential sounds of specific frequencies at a preperceptual time scale... - Proactive interference in a two-tone pitch-comparison task without additional interfering tonesTimo Ruusuvirta
Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, P O Box 13, 00014, Helsinki, Finland
Psychol Res 72:74-8. 2008..Our study demonstrates proactive interference in a two-tone pitch comparison task as the difficulty to remember when the first tone of the present pair occurred relative to the last tone of the immediately preceding pair... - Proactive interference of a sequence of tones in a two-tone pitch comparison taskT Ruusuvirta
Department of Psychology, University of Jyvaskyla, Finland
Psychon Bull Rev 7:327-31. 2000..The results support earlier hypotheses, presented in the context of retroactive interference, by demonstrating proactive interference of a tone sequence at the level of representations of individual tones... - Evidence of the origin of specific spontaneous head turns during intertrial intervalsT Korhonen
Department of Psychology, University of Jyvaskyla, Finland
Integr Physiol Behav Sci 32:123-30. 1997.... - Memory-based detection of rare sound feature combinations in anesthetized ratsPiia Astikainen
Department of Psychology, University of Jyvaäskylaä, Jyvaäskylaä, Finland
Neuroreport 17:1561-4. 2006..The relations of these event-related potentials to mismatch negativity and N1 in humans are addressed... - Effects of an NMDA-receptor antagonist MK-801 on an MMN-like response recorded in anesthetized ratsDmitry Tikhonravov
Neuroscience Unit, Institute of Biomedicine Physiology, University of Helsinki, Finland Helsinki Brain Research Center, Finland
Brain Res 1203:97-102. 2008..Further, this response was dose-dependently blocked by MK-801. These results suggest that the MMN-like response in rats depends on an intact NMDA-receptor system... - Longer storage of auditory than of visual information in the rabbit brain: evidence from dorsal hippocampal electrophysiologyPiia Astikainen
Department of Psychology, University of Jyvaskyla, PO Box 35, 40041, Jyvaskyla, Finland
Exp Brain Res 160:189-93. 2005..Our finding, thus, suggests a similarity in sensory processing abilities between human and non-human mammals... - Differences in pitch between tones affect behaviour even when incorrectly identified in directionT Ruusuvirta
Department of Psychology, University of Jyvaskyla, PO Box 35, 40351, Jyvaskyla, Finland
Neuropsychologia 39:876-9. 2001..The first hypothesis was supported in the sense that stimulus differences might affect behaviour even without their successful attentive processing in normal participants... - Auditory cortical event-related potentials to pitch deviances in ratsT Ruusuvirta
University of Jyvaskyla, Department of Psychology, Finland
Neurosci Lett 248:45-8. 1998.... - The human brain processes visual changes that are not cued by attended auditory stimulationPiia Astikainen
Department of Psychology, University of Jyvaskyla, P O Box 35, 40014 Jyvaskyla, Finland
Neurosci Lett 368:231-4. 2004..The occipital differential ERPs to deviants, which thus could be found only when standards were present in the series, are discussed in the context of the mismatch negativity (MMN)... - Affective modulation of conditioned eyeblinksSuvi Karla
Department of Psychology, University of Jyvaskyla, P O Box 35, FIN 40014 Jyvaskyla, Finland
Biol Psychol 82:192-194. 2009..The results add to the motivational priming hypothesis by demonstrating its partial applicability to associatively learned defensive behaviour... - Cooling of the cerebellar interpositus nucleus abolishes somatosensory cortical learning-related activity in eyeblink conditioned rabbitsJan Wikgren
Department of Pyschology, University of Jyvaskyla, P O Box 35, 40014 Jyvaskyla, Finland
Behav Brain Res 170:94-8. 2006..These findings suggest that the efferent copy of the signal related to the eyeblink CR is projected from the cerebellum to the cerebral cortical areas of the US modality... - A kind of auditory 'primitive intelligence' already present at birthVanessa Carral
Cognitive Neuroscience Research Group, Department of Psychiatry and Clinical Psychobiology, University of Barcelona, P. Vall d'Hebron 171, 08035 Barcelona, Catalonia, Spain
Eur J Neurosci 21:3201-4. 2005..This finding suggests the early ontogenetic origin of 'primitive intelligence' in audition that eventually may form a prerequisite for later language acquisition...