Direct electrical stimulation of the premotor cortex shuts down awareness of voluntary actions.

Abstract:

:A challenge for neuroscience is to understand the conscious and unconscious processes underlying construction of willed actions. We investigated the neural substrate of human motor awareness during awake brain surgery. In a first experiment, awake patients performed a voluntary hand motor task and verbally monitored their real-time performance, while different brain areas were transiently impaired by direct electrical stimulation (DES). In a second experiment, awake patients retrospectively reported their motor performance after DES. Based on anatomo-clinical evidence from motor awareness disorders following brain damage, the premotor cortex (PMC) was selected as a target area and the primary somatosensory cortex (S1) as a control area. In both experiments, DES on both PMC and S1 interrupted movement execution, but only DES on PMC dramatically altered the patients' motor awareness, making them unconscious of the motor arrest. These findings endorse PMC as a crucial hub in the anatomo-functional network of human motor awareness.

journal_name

Nat Commun

journal_title

Nature communications

authors

Fornia L,Puglisi G,Leonetti A,Bello L,Berti A,Cerri G,Garbarini F

doi

10.1038/s41467-020-14517-4

subject

Has Abstract

pub_date

2020-02-04 00:00:00

pages

705

issue

1

issn

2041-1723

pii

10.1038/s41467-020-14517-4

journal_volume

11

pub_type

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