Temporally resolved neural dynamics underlying handwriting

Leisi Pei (1) , Marieke Longcamp (2) , Frederick Koon-Shing Leung (1) , Guang Ouyang (1)

1 Faculty of Education, The University of Hong Kong, Hong Kong, China
2 LNC - Laboratoire de Neurosciences Cognitives [Marseille]

How do the temporal dynamics of neural activity encode highly coordinated visual-motor behaviour? To capture the millisecond-resolved neural activations associated with fine visual-motor skills, we devised a co-registration system to simultaneously record electroencephalogram and handwriting kinematics while participants were performing four handwriting tasks (writing in Chinese/English scripts with their dominant/non-dominant hand). The neural activation associated with each stroke was clearly identified with a well-structured and reliable pattern. The functional significance of this pattern was validated by its significant associations with language, hand and the cognitive stages and kinematics of handwriting. Furthermore, the handwriting rhythmicity was found to be synchronised to the brain's ongoing theta oscillation, and the synchronisation was associated with the factor of language and hand. These major findings imply an implication between motor skill formation and the interplay between the rhythms in the brain and the peripheral systems.

Mots clés: EEG; ERP; Neural entrainment; Handwriting; Fine motor control

Domaines: Sciences cognitives

Leisi Pei, Marieke Longcamp, Frederick Koon-Shing Leung, Guang Ouyang. Temporally resolved neural dynamics underlying handwriting. NeuroImage, 2021, 244, pp.118578. ⟨10.1016/j.neuroimage.2021.118578⟩. ⟨hal-03479623⟩