Ernst W. Hamburger's optimism: a NeuroMat video

The NeuroMat scientific dissemination has recently launched a short movie on physicist and science popularizer Ernst W. Hamburger, a NeuroMat PI. The video --which was produced by LAICA and supported by FAPESP-- is a development of an event on Hamburger's contributions that was organized at the University of São Paulo in 2016.

Vagas para pós-doutorado

O Centro de Pesquisa, Inovação e Difusão em Neuromatemática (NeuroMat), com sede na Universidade de São Paulo, Brasil, e financiado pela FAPESP, está selecionando candidatos a bolsas de pós-doutoramento para desenvolvimento de atividades de pesquisa na área de interface entre Matemática, Estatística, Computação e Neurociência.

Estimating the distance to a hereditary graph property

Carlos Hoppen, Yoshiharu Kohayakawa, Richard Lang, Hanno Lefmann and Henrique Stagni

Given a family of graphs "F", we prove that the distance to being induced "F"-free is estimable with a query complexity that depends only on the bounds of the Frieze-Kannan Regularity Lemma and a Removal Lemma for "F".

Dopamine Modulates Delta-Gamma Phase-Amplitude Coupling in the Prefrontal Cortex of Behaving Rats

Victoria Andino-Pavlovsky, Annie C. Souza, Robson Scheffer-Teixeira, Adriano B. L. Tort, Roberto Etchenique and Sidarta Ribeiro

Dopamine release and phase-amplitude cross-frequency coupling (CFC) have independently been implicated in prefrontal cortex (PFC) functioning. To causally investigate whether dopamine release affects phase-amplitude comodulation between different frequencies in local field potentials (LFP) recorded from the medial PFC (mPFC) of behaving rats, we used RuBiDopa, a light-sensitive caged compound that releases the neurotransmitter dopamine when irradiated with visible light. LFP power did not change in any frequency band after the application of light-uncaged dopamine, but significantly strengthened phase-amplitude comodulation between delta and gamma oscillations. Saline did not exert significant changes, while injections of dopamine and RuBiDopa produced a slow increase in comodulation for several minutes after the injection. The results show that dopamine release in the medial PFC shifts phase-amplitude comodulation from theta-gamma to delta-gamma. Although being preliminary results due to the limitation of the low number of animals present in this study, our findings suggest that dopamine-mediated modification of the frequencies involved in comodulation could be a mechanism by which this neurotransmitter regulates functioning in mPFC.

Ernst W. Hamburger: a life dedicated to promoting science

Video on the researcher and science popularizer Ernst W. Hamburger, produced by the RIDC NeuroMat, with support from FAPESP.

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NeuroMat

O Centro de Pesquisa, Inovação e Difusão em Neuromatemática está sediado na Universidade de São Paulo e é financiado pela FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo).

 

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