Talk by Prof. Miguel Maravall

Event Date: 
Fri, 16/05/2014 - 12:00

CBC Seminars

Miguel Maravall, from Dynamics and plasticity of cortical sensory responses Group - Miguel Hernández University, Alicante (Spain), invited by Gustavo Deco (CNS Group)

Title: (Dis)organising principles for neuronal response properties in the whisker system.

Abstract:

In this talk I will argue that the functional architecture of the rodent whisker system, a popular model for plasticity and active sensing, displays several computational principles shared with other sensory modalities. At each stage of the whisker pathway, individual neurons are selective to distinct temporal features (receptive fields) and display variable adaptive behaviour; these heterogeneous properties at the single-neuron level result in robust, overcomplete representations of dynamic stimuli at the population level. We have found that, in superficial layers of mouse barrel cortex, the spatial distribution of neuronal selectivity for temporal features does not appear to follow any ordering scheme: instead, neurons with different preferred features are interspersed in space. The dynamics of synapses relaying whisker information from thalamus to cortex are similarly diverse. In sum, circuits in the whisker system implement canonical computations such as linear filtering and adaptive gain rescaling, and the diversity of neuronal and synaptic functional properties at each stage is likely to enable the construction of rich combinatorial codes for dynamic whisker stimuli.

Paper:

Maravall_CurrentOpinionNeurobiology.pdf

 

When: 

FridayMay 16th, at 12:00

 

Where:

Campus de la Comunicacio UPF, C/ Roc Boronat, 132. MAP
Edifici 52 (Ed. Roc Boronat), room 52.S25

Universitat Pompeu Fabra.

How to get there:

Metro: Llacuna or Poblenou <L4>, Glories <L1>, Tram: Ca l’aranyó [T4]