Instituto do Cérebro
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Article Nootropic effects of LSD: Behavioral, molecular and computational evidence(Elsevier BV, 2022-06-19) Ornelas, Isis M; Silva, Felipe Augusto Cini da; Wießner, Isabel; Marcos, Encarni; Araujo, Draulio Barros de; Goto-Silva, Livia; Nascimento, Juliana; Silva, Sérgio Ruschi Bergamachi; Costa, Marcelo N; Falchi, Marcelo; Olivieri, Rodolfo; Fontes, Fernanda Palhano Xavier de; Sequerra, Eduardo Bouth; Martins-de-Souza, Daniel; Feilding, Amanda; Costa, César Rennó; Tófoli, Luis Fernando; Rehen, Stevens K; Ribeiro, Sidarta Tollendal GomesArticle Verbal Short-Term Memory Underlies Typical Development of “Thought Organization” Measured as Speech Connectedness(2019-07) Mota, NB; Callipo, R; Leite, L; Torres, AR; Weissheimer, J; Bunge, SA; Copelli, M; Ribeiro, Sidarta Tollendal GomesArticle The interpretation of dream meaning: Resolving ambiguity using Latent Semantic Analysis in a small corpus of text(2017-09-21) Altszyler, E; Ribeiro, Sidarta Tollendal Gomes; Sigman, M; Fernández Slezak, DArticle Object recognition impairment and rescue by a dopamine D2 antagonist in hyperdopaminergic mice(2016) França, Arthur S.C.; Muratori, Larissa; Nascimento, George Carlos do; Pereira, Catia Mendes; Ribeiro, Sidarta Tollendal Gomes; Soares, Bruno LobãoArticle Educating to Build Bridges(2013-05-17) Goldin, Andrea Paula; Calero, Cecilia Inés; Peña, Marcela; Ribeiro, Sidarta Tollendal Gomes; Sigman, MarianoArticle Improvement in physiological and psychological parameters after 6 months of yoga practice(2012-02-17) Rocha, K.K.F.; Ribeiro, A.M.; Rocha, K.C.F.; Sousa, Maria Bernardete Cordeiro de; Albuquerque, F.S.; Ribeiro, Sidarta Tollendal Gomes; Silva, R.H.Article Differential roles of the dorsal hippocampal regions in the acquisition of spatial and temporal aspects of episodic-like memory(2012-04-21) Barbosa, Flávio Freitas; Pontes, Isabella Maria de Oliveira; Ribeiro, Sidarta Tollendal Gomes; Ribeiro, Alessandra Mussi; Silva, Regina HelenaArticle Long-term use of psychedelic drugs is associated with differences in brain structure and personality in humans(2015) Bouso, José Carlos; Palhano-Fontes, Fernanda; Rodríguez-Fornells, Antoni; Ribeiro, Sidarta Tollendal Gomes; Sanches, Rafael; Crippa, José Alexandre S.; Hallak, Jaime E.C.; Araújo, Dráulio Barros de; Riba, JordiArticle Beta2 oscillations (23–30 Hz) in the mouse hippocampus during novel object recognition(Federation of European Neuroscience Societies and John Wiley & Sons, 2014-09-01) Franc a, Arthur S. C.; Nascimento, George Carlos do; Lopes-dos-Santos, Vıtor; Muratori, Larissa; Ribeiro, Sidarta Tollendal Gomes; Soares, Bruno Lobão; Tort, Adriano Bretanha LopesThe oscillatory activity of hippocampal neuronal networks is believed to play a role in memory acquisition and consolidation. Particular focus has been given to characterising theta (4–12 Hz), gamma (40–100 Hz) and ripple (150–250 Hz) oscillations. Beyond these well-described network states, few studies have investigated hippocampal beta2 (23–30 Hz) activity in vivo and its link to behaviour. A previous sudy showed that the exploration of novel environments may lead to the appearance of beta2 oscillations in the mouse hippocampus. In the present study we characterised hippocampal beta2 oscillations in mice during an object recognition task. We found prominent bursts of beta2 oscillations in the beginning of novel exploration sessions (four new objects), which could be readily observed by spectral analysis and visual inspection of local field potentials. Beta2 modulated hippocampal but not neocortical neurons and its power decreased along the session. We also found increased beta2 power in the beginning of a second exploration session performed 24 h later in a slightly modified environment (two new, two familiar objects), but to a lesser extent than in the first session. However, the increase in beta2 power in the second exploration session became similar to the first session when we pharmacologically impaired object recognition in a new set of experiments performed 1 week later. Our results suggest that hippocampal beta2 activity is associated with a dynamic network state tuned for novelty detection and which may allow new learning to occur.