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Correlação entre potência absoluta alfa induzida por EMT (5HZ) e estimativa do tempo

Tue, 20 Oct 2026 00:00:00 GMT

Título: Correlação entre potência absoluta alfa induzida por EMT (5HZ) e estimativa do tempo Autor(es): Freitas, Ana Cláudia Mota de Primeiro Orientador: Bastos, Victor Hugo do Vale Abstract: Behavioral traits such as inattention and/or hyperactivity, characteristic of the ADHD spectrum, even when present at subclinical levels (traits), have been linked to alterations in frontoparietal neural network functioning and can impact executive functions and time perception. Repetitive Transcranial Magnetic Stimulation (rTMS) is a promising neuromodulation technique, but its effects on time perception and neurophysiological activity in individuals with ADHD traits require further investigation. Objective: To investigate the effects of a single session of 5 Hz rTMS, compared to a Sham (placebo) condition, on performance in a time estimation task and on absolute alpha band power in university students with elevated ADHD traits. Methods: A randomized, crossover, placebo-controlled (Sham) study was conducted with 18 university students (18-29 years old) with elevated ADHD traits (>80th percentile on the ETDAH-AD). Participants received active 5 Hz rTMS and Sham stimulation over F3 and PZ in separate sessions (separated by 7 days). Time estimation task performance (1s, 4s, 7s, 9s intervals) and Electroencephalography (EEG) were assessed before and after each intervention, analyzing Absolute Error (AE), Relative Error (RE), and absolute alpha band power (Total, Alpha-1, Alpha-2) across multiple cortical regions. Results: For AE, rTMS significantly reduced the error in the 4s and 9s intervals (p<0.001). RE was significantly lower (indicating improvement) with active rTMS in the 1s (p=0.0029), 4s (p<0.0001), and 9s (p<0.0001) intervals compared to Sham. In the neurophysiological analysis, 5 Hz rTMS induced significant modulations in the absolute power of Total Alpha, Alpha-1, and Alpha-2 bands, involving increased power in central-parietal-temporal regions and frontal modulation. Conclusion: A single session of 5 Hz rTMS modulates cortical alpha oscillatory activity in a region-specific manner and enhances the precision of time perception in university students with elevated ADHD traits. These findings suggest underlying neurophysiological mechanisms for temporal deficits associated with ADHD traits and reinforce the potential of rTMS as an investigational and targeted intervention tool. Instituição: Universidade Federal do Delta do Parnaíba Tipo: Tese

#TecedoresDeAfeto: UMA A/R/TOGRAFIA DO PATRIMÔNIO VIVO

Mon, 18 Mar 2024 00:00:00 GMT

Título: #TecedoresDeAfeto: UMA A/R/TOGRAFIA DO PATRIMÔNIO VIVO Autor(es): Pereira, Vitor de Sampaio Primeiro Orientador: Lemos, Maria Patrícia Freitas de Abstract: This work highlights the artistic practice of an a/r/tographic action research carried out in the Vila-bairro Coqueiro da Praia in Luís Correia, Piauí. Public art produced colaboratively in large dimensions with the lambe-lambe collage technique, consolidates itself as a enhancing of the appreciation of the community's reference people as Living Heritage. The relational approach transforms the territory into an open-air museum, promoting artistic, heritage and sociocultural awareness. The objectives include, in addition to exhibition on a museum tour, the contribution to the community's selfrecognition as guardians of collective memory through the maintenance and communication of their traditional practices. This study innovates in the integration between public art, art-based educational practice, museology and traditional community, highlighting active participation in the recognition and preservation of local heritage. Instituição: Universidade Federal do Delta do Parnaíba Tipo: Dissertação

Percepção sobre o suporte social de mulheres que gestaram na pandemia da COVID- 19

Fri, 24 Nov 2023 00:00:00 GMT

Título: Percepção sobre o suporte social de mulheres que gestaram na pandemia da COVID- 19 Autor(es): Carvalho, Mariane Cardoso Primeiro Orientador: Freire, Sandra Elisa de Assis Abstract: COVID-19 has proven to be the greatest challenge humanity has faced since the end of World War II. Considering the physiological changes inherent to pregnancy, especially in the immune and respiratory systems, pregnant women were included in the risk group due to the risk of contagion. In this context, this dissertation aimed to identify the perception of social support among women who became pregnant during the COVID-19 pandemic. To achieve this purpose, the research was organized into two complementary studies. Study I consisted of a scoping review of the literature, aiming to explore the state of the art on the topic. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses for Scoping Reviews (PRISMA- ScR) extension was used. The search conducted in the SciELO, Web of Science, MEDLINE, PsycNET, and Scopus databases resulted in 1,407 studies, of which 24 met the inclusion criteria. The data revealed that social support acts as a relevant strategy in reducing loneliness during pregnancy. It was also observed that pregnant women subjected to isolation and with low social support presented higher levels of psychological distress. Study II was characterized as a field study aimed to identify the perception of social support of women who became pregnant during the most critical period of the COVID-19 pandemic. Participants who became pregnant between April 2020 and December 2021 were included, excluding those outside this period. Data collection was conducted online, using a Google Forms questionnaire, with non- probability convenience sampling. The sample consisted of 224 women, with a mean age of 30 years (SD = 5.69), ranging from 18 to 46 years. The instruments used were three scales—the Perceived Social Support Scale (EPSS), the Fear of COVID-19 in the Perinatal Period Scale (EMC19-9), and the Depression, Anxiety, and Stress Scale (DASS-21)—in addition to a sociodemographic questionnaire. The results showed that, although women perceived themselves receiving social support, no statistically significant correlations were found between social support and fear of COVID-19, nor between social support and the DASS-21 factors. On the other hand, significant correlations were found between fear of COVID-19 and the DASS-21 factors: depression (r = 0.38, p < 0.01), anxiety (r = 0.50, p < 0.01) and stress (r = 0.48, p < 0.01). Furthermore, fear of COVID-19 was found to have predictive power over symptoms of depression (β = 0.35, p < 0.000), anxiety (β = 0.44, p < 0.000), and stress (β = 0.44, p < 0.000), explaining, respectively, 14%, 24%, and 23% of the variability in these symptoms among pregnant women. Thus, the findings of the scoping review corroborate the literature by highlighting social support as a protective factor, playing an important role in preventing mental illness. However, the empirical results of this study did not demonstrate significant correlations between social support and mental health, but they did highlight a strong association between fear of COVID-19 and symptoms of depression, anxiety, and stress in women who became pregnant during the most critical period of the pandemic. Instituição: Universidade Federal do Delta do Parnaíba Tipo: Dissertação

Efeitos da neuromodulação por corrente contínua na ansiedade, controle inibitório e comportamento de risco em jovens universitários

Mon, 25 Aug 2025 00:00:00 GMT

Título: Efeitos da neuromodulação por corrente contínua na ansiedade, controle inibitório e comportamento de risco em jovens universitários Autor(es): Silva, Ana Carolina Martins Monteiro Primeiro Orientador: Medeiros, Paloma Cavalcante Bezerra de Abstract: The present study aimed to investigate the effects of tDCS on anxiety in young adults, as well as its effects on inhibitory control and risk behavior. Study I consisted of a systematic review that aimed to gather evidence regarding the use of tDCS in the treatment of adults with anxiety symptoms. The review also sought to examine variations in parameters such as current intensity, electrode montage, number of sessions, and session duration, with the goal of identifying which protocols show promising results depending on the intended outcome. The research was conducted using the SCIELO, PubMed, PsychInfo, Web of Science, and Embase databases, applying eligibility criteria related to tDCS and anxiety. Out of 642 articles found, the final review included eight articles, which revealed heterogeneity among the tDCS protocols used. The importance of the left and right dorsolateral prefrontal cortex in interventions targeting anxiety symptoms was emphasized. Attentional bias was highlighted as being directly related to anxiety symptoms, supporting a transdiagnostic perspective. Study II was a pilot experimental study, triple-blind, with repeated measures, aiming to evaluate the effectiveness of tDCS on anxiety symptoms, inhibitory control, and risk behavior. Data collection was carried out using the Hamilton Anxiety Scale and the State-Trait Anxiety Inventory to assess anxiety; the Go/No-Go Task for inhibitory control; and the Balloon Analogue Risk Task for risk behavior. The sample consisted of five university students who underwent two conditions: sham tDCS > active tDCS. The tDCS protocol included five sessions of bilateral stimulation with the anodal electrode positioned on the left DLPFC and the cathodal electrode on the right DLPFC, using a 2mA current for 20 minutes. All participants underwent both conditions, separated by a one-week washout period. Descriptive analyses and the Friedman test were performed using IBM SPSS STATISTICS software, version 23. The results did not indicate significant differences between conditions over time points T0, T1, and T2, except for the experimental condition on the STAI-State and the placebo condition on the STAI-Trait. Furthermore, a reduction in mean anxiety levels was observed over time in the two instruments used in the active condition, while in the sham condition, the decrease in anxiety levels was followed by an increase at the one-week follow-up. The study hypothesis was not confirmed; however, the results suggest that tDCS may modulate anxiety symptoms, albeit subtly. The lack of significance may be attributed to the small sample size, short washout period, broad tDCS protocol, and individual variability in responsiveness to neuromodulation. Therefore, it is recommended that future studies address these limitations by exploring larger samples and appropriate effect sizes. Instituição: Universidade Federal do Delta do Parnaíba Tipo: Dissertação