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Article: The onset of data-driven mental archeology.

Ribeiro, Sidarta

2014 Volume 8, Page(s) 249

Language	English
Publishing date	2014-08-13
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2411902-7
ISSN	1662-453X ; 1662-4548
ISSN (online)	1662-453X
ISSN	1662-4548
DOI	10.3389/fnins.2014.00249
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Article ; Online: The onset of data-driven mental archaeology

Sidarta Ribeiro

Frontiers in Neuroscience, Vol

2014 Volume 8

Keywords	mind ; self concept ; semantic distance ; Bronze Age ; Semantic holism ; Julian Jaynes ; Neurosciences. Biological psychiatry. Neuropsychiatry ; RC321-571 ; Internal medicine ; RC31-1245 ; Medicine ; R
Language	English
Publishing date	2014-08-01T00:00:00Z
Publisher	Frontiers
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Tempo de cérebro

Sidarta Ribeiro

Estudos Avançados, Vol 27, Iss 77, Pp 07-

2013 Volume 22

Abstract: No encontro entre matemática, física, química, biologia, psicologias, filosofia e artes, as neurociências fascinam o público pela possibilidade de compreensão dos mecanismos das emoções, pensamentos e ações, doenças e loucuras, aprendizado e esquecimento, ...

Abstract	No encontro entre matemática, física, química, biologia, psicologias, filosofia e artes, as neurociências fascinam o público pela possibilidade de compreensão dos mecanismos das emoções, pensamentos e ações, doenças e loucuras, aprendizado e esquecimento, sonhos e imaginação, fenômenos que nos definem e constituem. Como interpretar as novas descobertas das neurociências? O presente artigo aborda alguns tópicos de amplo interesse social: o envelhecimento, a educação, as drogas, o retorno científico à psicanálise e o problema da consciência. The neurosciences are at the confluence of mathematics, physics, chemistry, biology, psychology, philosophy, and the arts. They fascinate the general public due to the possibility of understanding the mechanisms of emotions, thoughts and actions, disease and madness, learning and forgetting, dreams and imagination, phenomena that define and conform us. How to interpret the new findings in neuroscience? This article discusses some topics of broad social interest: aging, education, drugs, the scientific return to psychoanalysis and the problem of consciousness.
Keywords	Cérebro ; Mente ; Consciência ; Memória ; Psicanálise ; Educação ; Brain ; Mind ; Consciousness ; Memory ; Psychoanalysis ; Education ; Social sciences (General) ; H1-99
Language	Spanish
Publishing date	2013-01-01T00:00:00Z
Publisher	Universidade de São Paulo
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Grammatical impairment in schizophrenia: An exploratory study of the pronominal and sentential domains.

Chaves, Monica F / Rodrigues, Cilene / Ribeiro, Sidarta / Mota, Natália B / Copelli, Mauro

PloS one

2023 Volume 18, Issue 9, Page(s) e0291446

Abstract: Schizophrenia (SZ) is a severe mental disorder associated with a variety of linguistic deficits, and recently it has been suggested that these deficits are caused by an underlying impairment in the ability to build complex syntactic structures and ... ...

Abstract	Schizophrenia (SZ) is a severe mental disorder associated with a variety of linguistic deficits, and recently it has been suggested that these deficits are caused by an underlying impairment in the ability to build complex syntactic structures and complex semantic relations. Aiming at contributing to determining the specific linguistic profile of SZ, we investigated the usage of pronominal subjects and sentence types in two corpora of oral dream and waking reports produced by speakers with SZ and participants without SZ (NSZ), both native speakers of Brazilian Portuguese. Narratives of 40 adult participants (20 SZ, and 20 NSZ-sample 1), and narratives of 31 teenage participants (11 SZ undergoing first psychotic episode, and 20 NSZ-sample 2) were annotated and statistically analyzed. Overall, narratives of speakers with SZ presented significantly higher rates of matrix sentences, null pronouns-particularly null 3Person referential pronouns-and lower rates of non-anomalous truncated sentences. The high rate of matrix sentences correlated significantly with the total PANSS scores, suggesting an association between the overuse of simple sentences and SZ symptoms in general. In contrast, the high rate of null pronouns correlated significantly with positive PANSS scores, suggesting an association between the overuse of null pronominal forms and the positive symptoms of SZ. Finally, a cross-group analysis between samples 1 and 2 indicated a higher degree of grammatical impairment in speakers with multiple psychotic episodes. Altogether, the results strengthen the notion that deficits at the pronominal and sentential levels constitute a cross-cultural linguistic marker of SZ.
MeSH term(s)	Adult ; Adolescent ; Humans ; Schizophrenia ; Psychotic Disorders ; Linguistics ; Semantics ; Brazil
Language	English
Publishing date	2023-09-12
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2267670-3
ISSN	1932-6203 ; 1932-6203
ISSN (online)	1932-6203
ISSN	1932-6203
DOI	10.1371/journal.pone.0291446
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Article ; Online: A protocol to examine the learning effects of 'multisystem mapping' training combined with post-training sleep consolidation in beginning readers.

Pegado, Felipe / Torres, Ana Raquel / Weissheimer, Janaina / Ribeiro, Sidarta

STAR protocols

2021 Volume 2, Issue 3, Page(s) 100712

Abstract: We have recently used randomized controlled trials to examine the impact of a short neuroscience-informed causal intervention using a targeted training to inhibit a deeply rooted visual mechanism (mirror invariance) that hinders literacy acquisition, ... ...

Abstract	We have recently used randomized controlled trials to examine the impact of a short neuroscience-informed causal intervention using a targeted training to inhibit a deeply rooted visual mechanism (mirror invariance) that hinders literacy acquisition, combined with post-training sleep (for learning consolidation). Using this training protocol, we have shown unprecedented improvements in visual perception of letters, writing, and a two-fold increase in reading fluency in first graders. Here, we describe this ecologically valid school-based intervention protocol to probe inhibition of mirror invariance for letters, including the detailed training instructions, post-training sleep consolidation, as well as practical tips and potential adaptations to different school sizes. For complete details on the use and execution of this protocol, please refer to Torres et al., (2021).
MeSH term(s)	Child ; Child, Preschool ; Female ; Humans ; Inhibition, Psychological ; Learning/physiology ; Literacy/psychology ; Male ; Memory Consolidation/physiology ; Pattern Recognition, Visual/physiology ; Randomized Controlled Trials as Topic/methods ; Reading ; Sleep/physiology ; Teaching/education ; Visual Perception/physiology ; Writing
Language	English
Publishing date	2021-08-07
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2666-1667
ISSN (online)	2666-1667
DOI	10.1016/j.xpro.2021.100712
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Article ; Online: Microelectrode implants, inflammatory response and long-lasting effects on NADPH diaphorase neurons in the rat frontal cortex.

Guimaraes, Joanilson S / Lemos, Nelson Alessandretti M / Freire, Marco Aurelio M / Pereira, Antonio / Ribeiro, Sidarta

Experimental brain research

2022 Volume 240, Issue 10, Page(s) 2569–2580

Abstract: At present, one of the main therapeutic challenges comprises the development of technologies to improve the life quality of people suffering from different types of body paralysis, through the reestablishment of sensory and motor functions. In this ... ...

Abstract	At present, one of the main therapeutic challenges comprises the development of technologies to improve the life quality of people suffering from different types of body paralysis, through the reestablishment of sensory and motor functions. In this regard, brain-machine interfaces (BMI) offer hope to effectively mitigate body paralysis through the control of paralyzed body parts by brain activity. Invasive BMI use chronic multielectrode implants to record neural activity directly from the brain tissue. While such invasive devices provide the highest amount of usable neural activity for BMI control, they also involve direct damage to the nervous tissue. In the cerebral cortex, high levels of the enzyme NADPH diaphorase (NADPH-d) characterize a particular class of interneurons that regulates neuronal excitability and blood supply. To gain insight into the biocompatibility of invasive BMI, we assessed the impact of chronic implanted tungsten multielectrode bundles on the distribution and morphology of NADPH-d-reactive neurons in the rat frontal cortex. NADPH-d neuronal labeling was correlated with glial response markers and with indices of healthy neuronal activity measured by electrophysiological recordings performed up to 3 months after multielectrode implantation. Chronic electrode arrays caused a small and quite localized structural disturbance on the implanted site, with neuronal loss and glial activation circumscribed to the site of implant. Electrodes remained viable during the entire period of implantation. Moreover, neither the distribution nor the morphology of NADPH-d neurons was altered. Overall, our findings provide additional evidence that tungsten multielectrodes can be employed as a viable element for long-lasting therapeutic BMI applications.
MeSH term(s)	Animals ; Frontal Lobe ; Humans ; Microelectrodes ; NADP ; NADPH Dehydrogenase/metabolism ; Neurons/metabolism ; Paralysis ; Rats ; Tungsten
Chemical Substances	NADP (53-59-8) ; NADPH Dehydrogenase (EC 1.6.99.1) ; Tungsten (V9306CXO6G)
Language	English
Publishing date	2022-08-10
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1201-4
ISSN	1432-1106 ; 0014-4819
ISSN (online)	1432-1106
ISSN	0014-4819
DOI	10.1007/s00221-022-06434-3
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Article ; Online: 5-MeO-DMT induces sleep-like LFP spectral signatures in the hippocampus and prefrontal cortex of awake rats.

Souza, Annie C / Souza, Bryan C / França, Arthur / Moradi, Marzieh / Souza, Nicholy C / Leão, Katarina E / Tort, Adriano B L / Leão, Richardson N / Lopes-Dos-Santos, Vítor / Ribeiro, Sidarta

Scientific reports

2024 Volume 14, Issue 1, Page(s) 11281

Abstract: 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT) is a potent classical psychedelic known to induce changes in locomotion, behaviour, and sleep in rodents. However, there is limited knowledge regarding its acute neurophysiological effects. Local field ... ...

Abstract	5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT) is a potent classical psychedelic known to induce changes in locomotion, behaviour, and sleep in rodents. However, there is limited knowledge regarding its acute neurophysiological effects. Local field potentials (LFPs) are commonly used as a proxy for neural activity, but previous studies investigating psychedelics have been hindered by confounding effects of behavioural changes and anaesthesia, which alter these signals. To address this gap, we investigated acute LFP changes in the hippocampus (HP) and medial prefrontal cortex (mPFC) of freely behaving rats, following 5-MeO-DMT administration. 5-MeO-DMT led to an increase of delta power and a decrease of theta power in the HP LFPs, which could not be accounted for by changes in locomotion. Furthermore, we observed a dose-dependent reduction in slow (20-50 Hz) and mid (50-100 Hz) gamma power, as well as in theta phase modulation, even after controlling for the effects of speed and theta power. State map analysis of the spectral profile of waking behaviour induced by 5-MeO-DMT revealed similarities to electrophysiological states observed during slow-wave sleep (SWS) and rapid-eye-movement (REM) sleep. Our findings suggest that the psychoactive effects of classical psychedelics are associated with the integration of waking behaviours with sleep-like spectral patterns in LFPs.
MeSH term(s)	Animals ; Prefrontal Cortex/drug effects ; Prefrontal Cortex/physiology ; Rats ; Hippocampus/drug effects ; Hippocampus/physiology ; Wakefulness/drug effects ; Wakefulness/physiology ; Male ; Sleep/drug effects ; Sleep/physiology ; Electroencephalography ; Theta Rhythm/drug effects ; Hallucinogens/pharmacology
Language	English
Publishing date	2024-05-17
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-61474-9
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Article ; Online: Speech graph analysis in obsessive-compulsive disorder: The relevance of dream reports.

Gomes, Matilde / Picó Pérez, Maria / Castro, Inês / Moreira, Pedro / Ribeiro, Sidarta / Mota, Natália B / Morgado, Pedro

Journal of psychiatric research

2023 Volume 161, Page(s) 358–363

Abstract: Obsessive-compulsive disorder (OCD) is a distressing disorder characterized by the presence of intrusive thoughts, images or urges (obsessions) and/or behavioral efforts to reduce the anxiety (compulsions). OCD lifetime prevalence varies between 1% and 3% ...

Abstract	Obsessive-compulsive disorder (OCD) is a distressing disorder characterized by the presence of intrusive thoughts, images or urges (obsessions) and/or behavioral efforts to reduce the anxiety (compulsions). OCD lifetime prevalence varies between 1% and 3% in the general population and there are no reliable markers that support the diagnosis. In order to fill this gap, Computational Psychiatry employs multiple types of quantitative analyses to improve the understanding, diagnosis, prediction, and treatment of mental illnesses including OCD. One of these computational tools is speech graphs analysis. A graph represents a network of nodes connected by edges: in non-semantic speech graphs, nodes correspond to words and edges correspond to the directed link between consecutive words. Using non-semantic speech graphs, we compared free speech samples from OCD patients and healthy controls (HC), to test whether speech graphs analysis can grasp structural differences in speech between these groups. To this end, 39 OCD patients and 37 HC were interviewed and recorded during six types of speech reports: yesterday, dream, old memory, positive image, negative image and neutral image. Also, the Obsessive-Compulsive Inventory-Revised (OCI-R) and the Yale Brown Obsessive-Compulsive Scale (Y-BOCS) were used to assess symptom severity. The graph-theoretical structural analysis of dream reports showed that OCD patients have significantly smaller lexical diversity, lower speech connectedness and a higher recurrence of words in comparison with HC. The other five report types failed to show differences between the groups, adding to the notion that dream reports are especially informative of speech structure in different psychiatric states. Further investigation is necessary to completely assess the potential of this tool in OCD.
MeSH term(s)	Humans ; Speech ; Obsessive-Compulsive Disorder/epidemiology ; Compulsive Behavior/diagnosis ; Compulsive Behavior/epidemiology ; Compulsive Behavior/psychology ; Anxiety
Language	English
Publishing date	2023-03-28
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	3148-3
ISSN	1879-1379 ; 0022-3956
ISSN (online)	1879-1379
ISSN	0022-3956
DOI	10.1016/j.jpsychires.2023.03.035
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Article ; Online: Sleep and plasticity.

Ribeiro, Sidarta

Pflugers Archiv : European journal of physiology

2011 Volume 463, Issue 1, Page(s) 111–120

Abstract: While there is ample agreement that the cognitive role of sleep is explained by sleep-dependent synaptic changes, consensus is yet to be established as to the nature of these changes. Some researchers believe that sleep promotes global synaptic ... ...

Abstract	While there is ample agreement that the cognitive role of sleep is explained by sleep-dependent synaptic changes, consensus is yet to be established as to the nature of these changes. Some researchers believe that sleep promotes global synaptic downscaling, leading to a non-Hebbian reset of synaptic weights that is putatively necessary for the acquisition of new memories during ensuing waking. Other investigators propose that sleep also triggers experience-dependent, Hebbian synaptic upscaling able to consolidate recently acquired memories. Here, I review the molecular and physiological evidence supporting these views, with an emphasis on the calcium signaling pathway. I argue that the available data are consistent with sleep promoting experience-dependent synaptic embossing, understood as the simultaneous non-Hebbian downscaling and Hebbian upscaling of separate but complementary sets of synapses, heterogeneously activated at the time of memory encoding and therefore differentially affected by sleep.
MeSH term(s)	Animals ; Brain/physiology ; Humans ; Neuronal Plasticity/physiology ; Sleep/physiology ; Synapses/physiology
Language	English
Publishing date	2011-09-27
Publishing country	Germany
Document type	Journal Article ; Review
ZDB-ID	6380-0
ISSN	1432-2013 ; 0031-6768
ISSN (online)	1432-2013
ISSN	0031-6768
DOI	10.1007/s00424-011-1031-5
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Article ; Online: A protocol to examine the learning effects of ‘multisystem mapping’ training combined with post-training sleep consolidation in beginning readers

Felipe Pegado / Ana Raquel Torres / Janaina Weissheimer / Sidarta Ribeiro, Ph.D.

STAR Protocols, Vol 2, Iss 3, Pp 100712- (2021)

2021

Abstract: Summary: We have recently used randomized controlled trials to examine the impact of a short neuroscience-informed causal intervention using a targeted training to inhibit a deeply rooted visual mechanism (mirror invariance) that hinders literacy ... ...

Abstract	Summary: We have recently used randomized controlled trials to examine the impact of a short neuroscience-informed causal intervention using a targeted training to inhibit a deeply rooted visual mechanism (mirror invariance) that hinders literacy acquisition, combined with post-training sleep (for learning consolidation). Using this training protocol, we have shown unprecedented improvements in visual perception of letters, writing, and a two-fold increase in reading fluency in first graders. Here, we describe this ecologically valid school-based intervention protocol to probe inhibition of mirror invariance for letters, including the detailed training instructions, post-training sleep consolidation, as well as practical tips and potential adaptations to different school sizes.For complete details on the use and execution of this protocol, please refer to Torres et al., (2021).
Keywords	Clinical Protocol ; Neuroscience ; Cognitive Neuroscience ; Behavior ; Science (General) ; Q1-390
Subject code	370
Language	English
Publishing date	2021-09-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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