The social brain in adolescence

Adolescence, defined as 10-24 years, is a period of life often characterised by behaviours that can appear, prima facie, irrational such as dangerous risk-taking and impulsivity. However, these behaviours can be interpreted as adaptive and rational given that a key developmental goal of this period of life is to mature into an independent adult while navigating a social world that is unstable and changing.

Deliberate ignorance: The curious choice not to know

Western history of thought abounds with claims that knowledge is valued and sought. Yet people often choose not to know. We call the conscious choice not to seek or use knowledge (or information) deliberate ignorance. Using examples from a wide range of domains, we demonstrate that deliberate ignorance has important functions. We systematize types of deliberate ignorance, describe their functions, discuss their normative desirability, and consider how they can be modeled.

CANCELLED - Scalable neural population dynamics underlying cognition in the basal ganglia

Time, like space, is a fundamental dimension of animals’ worlds. To  behave adaptively, organisms must extract temporal structure from  experience and construct temporally patterned  behavior. Yet, the  mechanisms for doing so are poorly understood. The striatum, a main input structure of the basal ganglia, has been implicated in several  time-dependent functions such as reinforcement learning and action  selection.

CANCELLED - Synchronization, waves and stochasticity in spatially structured neuronal networks

Synchronization between distant brain regions, in the 20-30 Hz frequency range, has been observed in areas such as V1 or in the motor cortex during movement preparation. In order to shed light on these data, we have revisited the synchronization properties of distinct oscillating local Excitatory-Inhibitory (E-I) modules induced by distance-dependent long-range excitation.

NMDA receptor dysfunction disrupts history biases in working memory

The NMDA receptor (NMDAR) subserves memory mechanisms at several timescales, including sustained delay activity and different temporal components of synaptic potentiation. We investigated behavioral and electrophysiological working memory alterations in a delayed response task in two diseases linked to hypofunctional NMDARs: schizophrenia and autoimmune anti-NMDAR encephalitis. We report a markedly reduced influence of previous stimuli on to-be remembered working memory contents, while memory accuracy was preserved.

Dynamical regimes of partially symmetric, dynamically balanced networks

The statistics of the connectivity in the cortex is significantly different from that of a random network. In particular, there is strong evidence that reciprocal connections are over-represented as compared to random networks. Theory describing collective neuronal dynamics in model networks only exists for symmetric and random connectivity. Thus, the impact of this partial symmetry in the synaptic connectivity on the neuronal dynamics is presently unknown.

CANCELLED - Intelligence Artificielle et Neurosciences: à la découverte des lois de l'apprentissage

[Covid – 19] Due to the current situation, as a measure of prevention and public health protection, we have decided to postpone to next year the five conferences scheduled for March 16-20 at the ENS.

La 22e édition de La Semaine du Cerveau a lieu du 16 au 22 mars 2020. Cet événement est organisé en France par la Société des Neurosciences.

SDC

CANCELLED - Le cerveau paresseux, surprenant moteur de l’intelligence humaine

[Covid – 19] Due to the current situation, as a measure of prevention and public health protection, we have decided to postpone to next year the five conferences scheduled for March 16-20 at the ENS.

La 22e édition de La Semaine du Cerveau a lieu du 16 au 22 mars 2020. Cet événement est organisé en France par la Société des Neurosciences.