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

Medicine and Health

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

L. Fornia, G. Puglisi, et al.

This groundbreaking study by Luca Fornia and colleagues explores how the premotor cortex influences our awareness of voluntary movements during awake brain surgery. By inducing temporary impairments in brain areas through electrical stimulation, the research reveals the premier role of the PMC in motor awareness—a discovery that could reshape our understanding of human cognition.

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Playback language: English
Abstract
This study investigated the neural substrate of human motor awareness during awake brain surgery. Awake patients performed a voluntary hand motor task while different brain areas were transiently impaired by direct electrical stimulation (DES). The premotor cortex (PMC) was targeted, with the primary somatosensory cortex (S1) serving as a control. DES on both PMC and S1 interrupted movement, but only PMC DES altered motor awareness, causing unawareness of the motor arrest. This supports the PMC's crucial role in the network for human motor awareness.
Publisher
Nature Communications
Published On
Feb 04, 2020
Authors
Luca Fornia, Guglielmo Puglisi, Antonella Leonetti, Lorenzo Bello, Anna Berti, Gabriella Cerri, Francesca Garbarini
Tags
motor awareness
premotor cortex
electrical stimulation
human cognition
voluntary movements
brain surgery
somatosensory cortex

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