Labial EMG activity during wilful inner speech and during auditory verbal hallucinations in schizophrenia

Hélène Loevenbruck (1, 2) , Lucile Rapin (2, 3) , Caroline Duval (2) , Marion Dohen (2) , Mircea Polosan (4, 5) , Pascal Perrier (6)

1 LPNC - Laboratoire de Psychologie et NeuroCognition
2 GIPSA-PCMD - GIPSA - Perception, Contrôle, Multimodalité et Dynamiques de la parole
3 Department of Education and Pedagogy
4 Service de Psychiatrie
5 GIN - Grenoble Institut des Neurosciences
6 GIPSA-MAGIC - GIPSA - Machines parlantes, Gestes oro-faciaux, Interaction Face-à-face, Communication augmentée

We examined lip and arm surface EMG activity in 23 healthy participants in tasks involving wilful inner speech (silent reading and silent generation of word definition) compared to relaxation and in 11 schizophrenia patients during auditory verbal hallucinations and rest periods. Results in healthy participants show that wilful inner speech corresponds to a significant increase in lip EMG activity compared with relaxation, while the activity in the arm muscle remains constant. Results in schizophrenia patients show a significant increase in lip EMG activity during AVHs relative to rest, without any increase of EMG activity in the arm muscle.

Mots clés: EMG; lips; schizophrenia; hallucination; wilful inner speech

Domaines: Neurosciences; Linguistique; Linguistique

Hélène Loevenbruck, Lucile Rapin, Caroline Duval, Marion Dohen, Mircea Polosan, et al.. Labial EMG activity during wilful inner speech and during auditory verbal hallucinations in schizophrenia. SN 13 - 11e Colloque de la Société des Neurosciences, May 2013, Lyon, France. pp.P2.195, abstract 480. ⟨hal-00863932⟩