Seminario del 2020

Dicembre
15
2020
Stefano Diomedi
Mixed Selectivity in Macaque Medial Parietal Cortex during Eye-Hand Reaching
nel ciclo di seminari: NEUROMATEMATICA
SEMINARIO INTERDISCIPLINARE
The activity of neurons of the medial posterior parietal area V6A in macaquemonkeys ismodulated bymany aspects of reach task. In the past, research wasmostly focused on modulating the effect of single parameters upon the activity of V6A cells. Here, we used Generalized Linear Models (GLMs) to simultaneously test the contribution of several factors upon V6A cells during a fix-to-reach task. This approach resulted in the definition of a representative ‘‘functional fingerprint’’ for each neuron. We first studied how the features are distributed in the population. Our analysis highlighted the virtual absence of units strictly selective for only one factor and revealed that most cells are characterized by ‘‘mixed selectivity.’’ Then, exploiting our GLM framework, we investigated the dynamics of spatial parameters encoded within V6A. We found that the tuning is not static, but changed along the trial, indicating the sequential occurrence of visuospatial transformations helpful to guide arm movement. Indirizzo zoom https://unibo.zoom.us/j/84150284556
organizzato da: Giovanna Citti (Dip. Matematica, UNIBO), Patrizia Fattori (DIBINEM, UNIBO), Alessandro Sarti (EHESS, Paris)

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