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Article ; Online: Speech-induced suppression during natural dialogues.

Gonzalez, Joaquin E / Nieto, Nicolás / Brusco, Pablo / Gravano, Agustín / Kamienkowski, Juan E

Communications biology

2024 Volume 7, Issue 1, Page(s) 291

Abstract: When engaged in a conversation, one receives auditory information from the other's speech but also from their own speech. However, this information is processed differently by an effect called Speech-Induced Suppression. Here, we studied brain ... ...

Abstract	When engaged in a conversation, one receives auditory information from the other's speech but also from their own speech. However, this information is processed differently by an effect called Speech-Induced Suppression. Here, we studied brain representation of acoustic properties of speech in natural unscripted dialogues, using electroencephalography (EEG) and high-quality speech recordings from both participants. Using encoding techniques, we were able to reproduce a broad range of previous findings on listening to another's speech, and achieving even better performances when predicting EEG signal in this complex scenario. Furthermore, we found no response when listening to oneself, using different acoustic features (spectrogram, envelope, etc.) and frequency bands, evidencing a strong effect of SIS. The present work shows that this mechanism is present, and even stronger, during natural dialogues. Moreover, the methodology presented here opens the possibility of a deeper understanding of the related mechanisms in a wider range of contexts.
MeSH term(s)	Humans ; Speech/physiology ; Acoustic Stimulation/methods ; Electroencephalography/methods ; Brain ; Brain Mapping/methods
Language	English
Publishing date	2024-03-08
Publishing country	England
Document type	Journal Article
ISSN	2399-3642
ISSN (online)	2399-3642
DOI	10.1038/s42003-024-05945-9
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Active search signatures in a free-viewing task exploiting concurrent EEG and eye movements recordings.

Care, Damián / da Fonseca, María / Ison, Matias J / Kamienkowski, Juan E

The European journal of neuroscience

2023 Volume 58, Issue 2, Page(s) 2563–2578

Abstract: Tasks we often perform in our everyday lives, such as reading or looking for a friend in the crowd, are seemingly straightforward but they actually require the orchestrated activity of several cognitive processes. Free-viewing visual search requires a ... ...

Abstract	Tasks we often perform in our everyday lives, such as reading or looking for a friend in the crowd, are seemingly straightforward but they actually require the orchestrated activity of several cognitive processes. Free-viewing visual search requires a plan to move our gaze on the different items, identifying them, and deciding on whether to continue with the search. Little is known about the electrophysiological signatures of these processes in free-viewing because there are technical challenges associated with eye movement artefacts. Here, we aimed to study how category information, as well as ecologically relevant variables such as the task performed, influence brain activity in a free-viewing paradigm. Participants were asked to observe/search from an array of faces and objects embedded in random noise. We concurrently recorded electroencephalogram and eye movements and applied a deconvolution analysis approach to estimate the contribution of the different elements embedded in the task. Consistent with classical fixed-gaze experiments and a handful of free-viewing studies, we found a robust categorical effect around 150 ms in occipital and occipitotemporal electrodes. We also report a task effect, more negative in posterior central electrodes in visual search compared with exploration, starting at around 80 ms. We also found significant effects of trial progression and an interaction with the task effect. Overall, these results generalise the characterisation of early visual face processing to a wider range of experiments and show how a suitable analysis approach allows to discern among multiple neural contributions to the signal, preserving key attributes of real-world tasks.
MeSH term(s)	Humans ; Eye Movements ; Electroencephalography ; Visual Perception/physiology ; Facial Recognition ; Fixation, Ocular
Language	English
Publishing date	2023-06-21
Publishing country	France
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	645180-9
ISSN	1460-9568 ; 0953-816X
ISSN (online)	1460-9568
ISSN	0953-816X
DOI	10.1111/ejn.16057
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Article ; Online: Increased integration of functional connectivity after cognitive intervention in preschoolers from low socioeconomic status.

Pietto, Marcos Luis / Giovannetti, Federico / Segretin, Maria S / Kamienkowski, Juan E / Lipina, Sebastián J

Developmental psychology

2023 Volume 59, Issue 10, Page(s) 1823–1838

Abstract: Cognitive interventions that involve executive functions (EF)-demanding activities are effective in changing task-related brain activity in children from homes with low socioeconomic status (SES). However, less is known about the efficiency of EF-based ... ...

Abstract	Cognitive interventions that involve executive functions (EF)-demanding activities are effective in changing task-related brain activity in children from homes with low socioeconomic status (SES). However, less is known about the efficiency of EF-based interventions in modifying segregation and integration properties of the functional neural organization during a resting state. Further, the consideration of the initial cognitive performance in the design of interventions and its role in the outcome of cognitive training has been poorly studied. The present study aimed to examine the impact of two individualized cognitive interventions with EF-demanding activities on brain connectivity in preschoolers (
Language	English
Publishing date	2023-05-18
Publishing country	United States
Document type	Journal Article
ZDB-ID	2066223-3
ISSN	1939-0599 ; 0012-1649
ISSN (online)	1939-0599
ISSN	0012-1649
DOI	10.1037/dev0001541
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Article ; Online: Unveiling Trail Making Test: visual and manual trajectories indexing multiple executive processes.

Linari, Ignacio / Juantorena, Gustavo E / Ibáñez, Agustín / Petroni, Agustín / Kamienkowski, Juan E

Scientific reports

2022 Volume 12, Issue 1, Page(s) 14265

Abstract: The Trail Making Test (TMT) is one of the most popular neuropsychological tests for executive functions (EFs) assessment. It presents several strengths: it is sensitive to executive dysfunction, it is easy to understand, and has a short administration. ... ...

Abstract	The Trail Making Test (TMT) is one of the most popular neuropsychological tests for executive functions (EFs) assessment. It presents several strengths: it is sensitive to executive dysfunction, it is easy to understand, and has a short administration. However, it has important limitations. First, the underlying EFs articulated during the task are not well discriminated, which makes it a test with low specificity. Second, the pen-and-paper version presents one trial per condition which introduces high variability. Third, only the total time is quantified, which does not allow for a detailed analysis. Fourth, it has a fixed spatial configuration per condition. We designed a computerised version of the TMT to overcome its main limitations and evaluated it in a group of neurotypical adults. Eye and hand positions are measured with high resolution over several trials, and spatial configuration is controlled. Our results showed a very similar performance profile compared to the traditional TMT. Moreover, it revealed differences in eye movements between parts A and B. Most importantly, based on hand and eye movements, we found an internal working memory measure that showed an association to a validated working memory task. Additionally, we proposed another internal measure as a potential marker of inhibitory control. Our results showed that EFs can be studied in more detail using traditional tests combined with powerful digital setups. The cTMT showed potential use in older adult populations and patients with EFs disorders.
MeSH term(s)	Aged ; Executive Function ; Humans ; Memory, Short-Term ; Neuropsychological Tests ; Trail Making Test
Language	English
Publishing date	2022-08-22
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-022-16431-9
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Article: Predicting Known Sentences: Neural Basis of Proverb Reading Using Non-parametric Statistical Testing and Mixed-Effects Models.

Bianchi, Bruno / Shalom, Diego E / Kamienkowski, Juan E

Frontiers in human neuroscience

2019 Volume 13, Page(s) 82

Abstract: Predictions of future events play an important role in daily activities, such as visual search, listening, or reading. They allow us to plan future actions and to anticipate their outcomes. Reading, a natural, commonly studied behavior, could shed light ... ...

Abstract	Predictions of future events play an important role in daily activities, such as visual search, listening, or reading. They allow us to plan future actions and to anticipate their outcomes. Reading, a natural, commonly studied behavior, could shed light over the brain processes that underlie those prediction mechanisms. We hypothesized that different mechanisms must lead predictions along common sentences and proverbs. The former ones are more based on semantic and syntactic cues, and the last ones are almost purely based on long-term memory. Here we show that the modulation of the N400 by Cloze-Task Predictability is strongly present in common sentences, but not in proverbs. Moreover, we present a novel combination of linear mixed models to account for multiple variables, and a cluster-based permutation procedure to control for multiple comparisons. Our results suggest that different prediction mechanisms are present during reading.
Language	English
Publishing date	2019-03-18
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2425477-0
ISSN	1662-5161
ISSN	1662-5161
DOI	10.3389/fnhum.2019.00082
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Article ; Online: Parsing a mental program: Fixation-related brain signatures of unitary operations and routines in natural visual search.

Kamienkowski, Juan E / Varatharajah, Alexander / Sigman, Mariano / Ison, Matias J

NeuroImage

2018 Volume 183, Page(s) 73–86

Abstract: Visual search involves a sequence or routine of unitary operations (i.e. fixations) embedded in a larger mental global program. The process can indeed be seen as a program based on a while loop (while the target is not found), a conditional construct ( ... ...

Abstract	Visual search involves a sequence or routine of unitary operations (i.e. fixations) embedded in a larger mental global program. The process can indeed be seen as a program based on a while loop (while the target is not found), a conditional construct (whether the target is matched or not based on specific recognition algorithms) and a decision making step to determine the position of the next searched location based on existent evidence. Recent developments in our ability to co-register brain scalp potentials (EEG) during free eye movements has allowed investigating brain responses related to fixations (fixation-Related Potentials; fERPs), including the identification of sensory and cognitive local EEG components linked to individual fixations. However, the way in which the mental program guiding the search unfolds has not yet been investigated. We performed an EEG and eye tracking co-registration experiment in which participants searched for a target face in natural images of crowds. Here we show how unitary steps of the program are encoded by specific local target detection signatures and how the positioning of each unitary operation within the global search program can be pinpointed by changes in the EEG signal amplitude as well as the signal power in different frequency bands. By simultaneously studying brain signatures of unitary operations and those occurring during the sequence of fixations, our study sheds light into how local and global properties are combined in implementing visual routines in natural tasks.
MeSH term(s)	Adult ; Attention/physiology ; Cerebral Cortex/physiology ; Electroencephalography/methods ; Evoked Potentials/physiology ; Evoked Potentials, Visual/physiology ; Eye Movement Measurements ; Eye Movements/physiology ; Facial Recognition/physiology ; Female ; Humans ; Male ; Space Perception/physiology ; Young Adult
Language	English
Publishing date	2018-08-08
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1147767-2
ISSN	1095-9572 ; 1053-8119
ISSN (online)	1095-9572
ISSN	1053-8119
DOI	10.1016/j.neuroimage.2018.08.010
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Zs.MO 7: Show issues

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Book ; Online: Unveiling Trail Making Test

Linari, Ignacio / Juantorena, Gustavo / Ibañez, Agustin / Petroni, Agustin / Kamienkowski, Juan E.

Visual and manual trajectories indexing multiple executive processes

2021

Abstract: The Trail Making Test (TMT) is one of the most popular neuropsychological tests in the clinical assessment of executive functions (EF) and research in a wide range of clinical conditions. In addition to its sensitivity to executive dysfunction, the TMT ... ...

Abstract	The Trail Making Test (TMT) is one of the most popular neuropsychological tests in the clinical assessment of executive functions (EF) and research in a wide range of clinical conditions. In addition to its sensitivity to executive dysfunction, the TMT presents several strengths: it is simple and intuitive, it is easy to understand for patients, and has a short administration. However, it has important limitations. First, the underlying EFs articulated during the task are not well discriminated, which makes it a test with low specificity. Second, the traditional pen-and-paper version presents one trial per condition which introduces high variability. Third, only the total time is quantified, which does not allow for a detailed analysis. Fourth, it has a fixed spatial configuration per condition. In the present study we designed a computerized version of the TMT (cTMT) to overcome its main limitations. Eye and hand positions are simultaneously measured with high resolution, several trials are acquired, and spatial configuration of the targets is controlled. Our results showed a very similar performance profile compared to the traditional TMT. Moreover, it revealed similarities and differences in eye movements between the two parts of the task. Most importantly, we found an internal working memory measure of the cTMT based on hand and eye movements that showed an association to a validated working memory task. Additionally, we found another internal measure of the TMT, also based on hand and eye movements, that we propose as a potential marker of inhibitory control. Our results showed that executive functions can be studied in more detail using traditional tests combined with powerful digital setups. Finally, our study paved the way for a detailed analysis of other complex tasks used for clinical evaluation, providing a deeper understanding of the processes underlying its resolution.
Keywords	Quantitative Biology - Neurons and Cognition
Subject code	150
Publishing date	2021-09-30
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Sensorimotor synchronization: neurophysiological markers of the asynchrony in a finger-tapping task.

Bavassi, Luz / Kamienkowski, Juan E / Sigman, Mariano / Laje, Rodrigo

Psychological research

2017 Volume 81, Issue 1, Page(s) 143–156

Abstract: Sensorimotor synchronization (SMS) is a form of referential behavior in which an action is coordinated with a predictable external stimulus. The neural bases of the synchronization ability remain unknown, even in the simpler, paradigmatic task of finger ... ...

Abstract	Sensorimotor synchronization (SMS) is a form of referential behavior in which an action is coordinated with a predictable external stimulus. The neural bases of the synchronization ability remain unknown, even in the simpler, paradigmatic task of finger tapping to a metronome. In this task the subject is instructed to tap in synchrony with a periodic sequence of brief tones, and the time difference between each response and the corresponding stimulus tone (asynchrony) is recorded. We make a step towards the identification of the neurophysiological markers of SMS by recording high-density EEG event-related potentials and the concurrent behavioral response-stimulus asynchronies during an isochronous paced finger-tapping task. Using principal component analysis, we found an asymmetry between the traces for advanced and delayed responses to the stimulus, in accordance with previous behavioral observations from perturbation studies. We also found that the amplitude of the second component encodes the higher-level percept of asynchrony 100 ms after the current stimulus. Furthermore, its amplitude predicts the asynchrony of the next step, past 300 ms from the previous stimulus, independently of the period length. Moreover, the neurophysiological processing of synchronization errors is performed within a fixed-duration interval after the stimulus. Our results suggest that the correction of a large asynchrony in a periodic task and the recovery of synchrony after a perturbation could be driven by similar neural processes.
MeSH term(s)	Adult ; Evoked Potentials/physiology ; Female ; Fingers/physiology ; Humans ; Male ; Psychomotor Performance/physiology ; Reaction Time/physiology ; Young Adult
Language	English
Publishing date	2017-01
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1463034-5
ISSN	1430-2772 ; 0340-0727
ISSN (online)	1430-2772
ISSN	0340-0727
DOI	10.1007/s00426-015-0721-6
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Article ; Online: Human and computer estimations of Predictability of words in written language.

Bianchi, Bruno / Bengolea Monzón, Gastón / Ferrer, Luciana / Fernández Slezak, Diego / Shalom, Diego E / Kamienkowski, Juan E

Scientific reports

2020 Volume 10, Issue 1, Page(s) 4396

Abstract: When we read printed text, we are continuously predicting upcoming words to integrate information and guide future eye movements. Thus, the Predictability of a given word has become one of the most important variables when explaining human behaviour and ... ...

Abstract	When we read printed text, we are continuously predicting upcoming words to integrate information and guide future eye movements. Thus, the Predictability of a given word has become one of the most important variables when explaining human behaviour and information processing during reading. In parallel, the Natural Language Processing (NLP) field evolved by developing a wide variety of applications. Here, we show that using different word embeddings techniques (like Latent Semantic Analysis, Word2Vec, and FastText) and N-gram-based language models we were able to estimate how humans predict words (cloze-task Predictability) and how to better understand eye movements in long Spanish texts. Both types of models partially captured aspects of predictability. On the one hand, our N-gram model performed well when added as a replacement for the cloze-task Predictability of the fixated word. On the other hand, word embeddings were useful to mimic Predictability of the following word. Our study joins efforts from neurolinguistic and NLP fields to understand human information processing during reading to potentially improve NLP algorithms.
Language	English
Publishing date	2020-03-10
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-020-61353-z
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Article ; Online: Electrophysiological approaches in the study of cognitive development outside the lab.

Pietto, Marcos L / Gatti, Mathias / Raimondo, Federico / Lipina, Sebastián J / Kamienkowski, Juan E

PloS one

2018 Volume 13, Issue 11, Page(s) e0206983

Abstract: The use of human neuroimaging technology provides knowledge about several emotional and cognitive processes at the neural level of organization. In particular, electroencephalographic (EEG) techniques allow researchers to explore high-temporal resolution ...

Abstract	The use of human neuroimaging technology provides knowledge about several emotional and cognitive processes at the neural level of organization. In particular, electroencephalographic (EEG) techniques allow researchers to explore high-temporal resolution of the neural activity that underlie the dynamics of cognitive processes. Although EEG research has been mostly applied in laboratory settings, recently a low-cost, portable EEG apparatus was released, which allows exploration of different emotional and cognitive processes during every-day activities. We compared a wide range of EEG measures using both a low-cost portable and a high-quality laboratory system. EEG recordings were done with both systems while participants performed an active task (Go/NoGo) and during their resting-state. Results showed similar waveforms in terms of morphology and amplitude of the ERPs, and comparable effects between conditions of the applied Go/NoGo paradigm. In addition, the contribution of each frequency to the entire EEG was not significantly different during resting-state, and fluctuations in amplitude of oscillations showed long-range temporal correlations. These results showed that low-cost, portable EEG technology can provide an alternative of enough quality for measuring brain activity outside a laboratory setting, which could contribute to the study of different populations in more ecological contexts.
MeSH term(s)	Adult ; Brain/physiology ; Cognition ; Electroencephalography ; Electrophysiological Phenomena ; Evoked Potentials ; Female ; Humans ; Male ; Middle Aged ; Rest
Language	English
Publishing date	2018-11-26
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1932-6203
ISSN (online)	1932-6203
DOI	10.1371/journal.pone.0206983
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