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Action coding in the posterior parietal cortex| old_uid | 10854 |
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| title | Action coding in the posterior parietal cortex |
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| start_date | 2012/02/10 |
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| schedule | 11h30 |
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| online | no |
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| summary | The posterior parietal cortex is classically considered as an
associative region in which the convergence of visual (dorsal stream)
and somatosensory inputs allows the emergence of a more abstract level
of representations (body schema and space). This would in turn allow the
constructions of motor programs to be fed to the motor cortex for
execution. However, more recent anatomical and functional data, showed
that this region is bidirectionally connected with the motor cortex, and
hosts motor neurons. More specifically, anatomical studies provided a
multi-architectonic parcellation of inferior parietal lobule (IPL) in
macaque, and connectional data identified parallel circuits connecting
specific IPL, premotor and prefrontal areas. Functional studies
described the distribution along IPL of motor and sensory properties at
the single neuron level. In particular, grasping neurons motor discharge
is modulated by the final goal of the action sequence in which grasping
is embedded. This prompted the idea that IPL could be involved in the
intentional coding of actions. Some of these motor neurons are also
active during action observation, indicating a possible role of this
region also in intention understanding. |
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| responsibles | Béranger |
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