Pre-motion positivity during self-paced movements of finger and mouth.
The present study investigated the role of pre-motion positivity in movement initiation and the reason why it is not reliably detectable in every study participant. Nineteen right-handed participants performed self-initiated simple movements of the right index finger and mouth while electroencephalography activity was recorded. Most of the participants showed a clear-cut pre-motion positivity with its characteristics varying as a function of the effector involved in the movement. The pre-motion positivity distribution was ipsilateral for finger movements and symmetrical for mouth movements. The results suggest that pre-motion positivity might represent a go-signal to initiate the movement and its occurrence might depend on movement initiation strategies.
Bortoletto
Marta
M
Department of General Psychology, University of Padova, Padova, Italy. marta.bortoletto@unipd.it
Sarlo
Michela
M
Poli
Silvia
S
Stegagno
Luciano
L
D000328:Adult; D001931:Brain Mapping; D004569:Electroencephalography / Q000379:methods; D004576:Electromyography / Q000379:methods; D004585:Electrooculography / Q000379:methods; D019054:Evoked Potentials, Motor / Q000502:physiology; D005260:Female; D005385:Fingers; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008297:Male; D009038:Motion; D009055:Mouth; D009068:Movement / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*