Navegando por Autor "Mendes, Thatiane Maria Almeida Silveira"

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Effect of the menstrual cycle on electroencephalogram alpha and beta bands during motor imagery and action observation
(Frontiers Media SA, 2022-05-04) Souza, Rafaela Faustino Lacerda de; Mendes, Thatiane Maria Almeida Silveira; Lima, Luana Adalice Borges de Arauj; Brandão, Daniel Soares; Laplagne, Diego Andrés; Sousa, Maria Bernardete Cordeiro de
Female sex steroids (FSS) can affect the motor system, modulating motor cortex excitability as well as performance in dexterity and coordination tasks. However, it has not yet been explored whether FSS affects the cognitive components of motor behavior. Mu is a sensorimotor rhythm observed by electroencephalography (EEG) in alpha (8–12 Hz) and beta (15–30 Hz) frequency bands in practices such as motor imagery (MI) and action observation (AO). This rhythm represents a window for studying the activity of neural circuits involved in motor cognition. Herein we investigated whether the alpha-mu and beta-mu power in the sensorimotor region (C3 and C4, hypothesis-driven approach) and the alpha and beta power over frontal, parietal, and occipital regions (data-driven approach) are modulated differently in the menstrual, follicular, and luteal phases of menstrual cycles in right-handed dominant women. To do so, these women underwent MI and AO in the three menstrual cycle phases. The spectral activity of the cortical regions for the alpha and beta bands were compared between phases of the menstrual cycle and a correlation analysis was also performed in relation to estrogen and progesterone levels. For the hypothesis-based approach, beta-mu event-related desynchronization (ERD) was significantly stronger in the C3 channel in the follicular phase than in the menstrual and luteal phases. For the data-driven approach, beta ERD during MI was higher in the follicular phase than in the menstrual and luteal phases in the frontal region. These findings suggest the effect of FSS on executive movement control. No effect of menstrual cycle phases was observed in cortical areas investigated during OA, but alpha and beta bands correlated positively with the follicular phase plasma estradiol level. Thus, the attenuation of alpha and beta bands referring to mirror neuron activities appears to be associated with inhibition of cortical activity when estradiol levels are lower, improving cognitive processing of motor action
Implicit motor imagery performance and cortical activity throughout the menstrual cycle
(Springer Science and Business Media LLC, 2022-12) Souza, Rafaela Faustino Lacerda de; Lima, Luana Adalice Borges de Araujo; Mendes, Thatiane Maria Almeida Silveira; Brandão, Daniel Soares; Laplagne, Diego Andrés; Sousa, Maria Bernardete Cordeiro de
Studies show that female motor and visuospatial skills are modulated by the menstrual cycle. Implicit motor imagery, meaning the involuntary imagination of movements during a task, involves kinesthetic, visual, and spatial aspects of the corresponding action and can be investigated by using the hand laterality judgment task (HLJT). In this study we aimed to investigate whether implicit motor imagery performance and cortical activity are altered throughout the menstrual cycle, as demonstrated by motor skills in females. Thus, 31 healthy women underwent HLJT during the menstrual, follicular and luteal phases of their menstrual cycles. Right-handed participants had to recognize the laterality (right or left) of hands presented in different views (palm or back) and orientations on a computer screen. Test performance and EEG event-related potentials were analyzed. Participants performed better in the test in the follicular and luteal phases when compared to the menstrual phase, and the accuracy of the test was positively correlated with estradiol levels in the follicular phase. The difference between medial and lateral hand orientations for rotation-related negativity was significant in the medial and left parieto-occipital regions only in the follicular phase. These findings suggest positive modulating action of estradiol in performing implicit motor imagery
Territorialidade e identidade em crianças da Comunidade Quilombola Moita Verde/RN: uma metodologia baseada na investigação-ação-participativa
(Universidade Federal do Rio Grande do Norte, 2024-03-01) Mendes, Thatiane Maria Almeida Silveira; Diniz, Raquel Farias; http://lattes.cnpq.br/1787447588845163; http://lattes.cnpq.br/0209042165431236; Andrade, Soraya Souza de; Melo, Symone Fernandes de
O presente trabalho teve como objetivo desenvolver uma proposta metodológica orientada pela Investigação-Ação-Participativa (IAP) para o trabalho com crianças, com foco na relação identidade-território. Tal proposta partiu do interesse por incentivar a escuta e a valorização das contribuições das crianças durante o processo de pesquisa, de maneira que o trabalho conjunto entre pesquisadora/or e suas/seus parceiras/os não se torne unilateral, mas horizontal, colaborativo e comprometido ética e politicamente com a autonomia deste grupo social. Para tanto, foram desenvolvidos oito encontros grupais e semanais, com duração aproximada de duas horas, destinados a discutir temáticas relacionadas aos três eixos da identidade para Antonio da Costa Ciampa: eu-comigo, eu-com-o-outro, e eu-com-mundo. O mundo, aqui, adquire a conotação de território habitado para Milton Santos: abrange o conjunto de objetos e ações que compõem o espaço humano e só pode ser compreendido levando-se em consideração a totalidade das dinâmicas sociais e seu contexto histórico. A compreensão de território que nos orienta, portanto, leva em consideração a ocupação e distribuição territorial mediada pelos tentáculos da economia capitalista, a força de seus espaços hegemônicos e a influência das dinâmicas raciais e de classe, abrigando contradições e sendo palco de disputas. Neste estudo, contei com a participação de quatro crianças, com idades entre 6 e 9 anos, da Comunidade Quilombola Moita Verde (RN), chão em que esta metodologia se desenvolveu. Como ferramentas metodológicas, foram utilizadas a fotografia, o desenho, a contação de histórias a partir de livros infantis e os jogos de tabuleiro. Conclui-se que a metodologia promoveu os efeitos esperados, ressaltando que o êxito de sua aplicação residirá sempre na sensibilidade de escuta do/a pesquisador/ra e no seu compromisso ético para identificar as demandas de cada território e transformá-las em encontros temáticos a serem trabalhados, bem como em sua capacidade criativa para (re)elaborar e adaptar os materiais utilizados de acordo com as características das pessoas participantes e do contexto em que se insere.
The impact of a brief mindfulness training on interoception: A randomized controlled trial
(Public Library of Science (PLoS), 2022-09-07) Araujo, Geissy Lainny de Lima; Sousa Júnior, Geovan Menezes de; Mendes, Thatiane Maria Almeida Silveira; Demarzo, Marcelo; Farb, Norman; Araujo, Draulio Barros de; Sousa, Maria Bernardete Cordeiro de
Interoception is a collection of different representations of signals originating within the body. The way of perceiving these signals seems to be related to both emotion regulation and dysregulation, and its dysfunction is implicated across a variety of affective disorders. There is a growing body of research investigating the relationship between mindfulness meditation practices and interoception showing an increase in interoceptive processes with regular training. In this study, we assessed the effects of a three-day mindfulness training on interoceptive accuracy and sensibility in a young healthy adult sample. Moreover, we also performed a mediation analysis on interoceptive sensibility and anxiety. Healthy participants (n = 40) naive to mindfulness practices were randomized to a brief mindfulness training (MT) (n = 20, females = 10) or to an active control group (n = 20, females = 10). Participants were assessed before and after the 3-days intervention for both groups on measures of interoception and anxiety in a modified intention-to-treat approach. The brief mindfulness training group increased interoceptive sensibility while active control had no effects on this variable. Five out of eight subdomains of interoceptive sensibility were significantly improved after mindfulness training. There was no significant difference in interoceptive accuracy after training. The effect of a brief mindfulness training on interoceptive sensibility mediated changes in the anxiety state. To date, this is the first study showing a plausible mechanism of a brief mindfulness training to explain the anxiolytic effects of meditation practices

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Navegando por Autor "Mendes, Thatiane Maria Almeida Silveira"