title: Late event-related potentials and movement complexity in young adults with Down syndrome.
abstract: OBJECTIVE
  Through event-related potential (ERP) recording, to better understand the perceptive-motor slowness in adults with Down syndrome (DS); in particular, to assess whether motor preparation influences the speed of allocation of perceptual attention as reflected by the P3 latency.
  
  
  METHODS
  ERPs were obtained in adults with and without DS through an auditory oddball paradigm under a passive and two active (simple vs. complex motor response) conditions. Reaction times (RTs) were recorded in the two active conditions.
  
  
  RESULTS
  There was no influence of movement complexity on either RT or P3b latency in the control group. In the DS group, RT was delayed under simple vs. complex conditions whereas P3b latency was not affected. N2a and N2b were often missing in DS individuals.
  
  
  CONCLUSIONS
  Motor preparation processes per se rather than interaction with perceptual attention could be defective in individuals with DS when the motor component of the response is minimal.
authors.affiliation: Université J. Fourier, Laboratoire Sport et Performance Motrice, BP 53, 38041 Grenoble cedex 9, France.
authors.forename: Elodie
authors.initials: E
authors.lastname: Lalo
authors.forename: Laurent
authors.initials: L
authors.lastname: Vercueil
authors.forename: Thierry
authors.initials: T
authors.lastname: Bougerol
authors.forename: Pierre-Simon
authors.initials: PS
authors.lastname: Jouk
authors.forename: Bettina
authors.initials: B
authors.lastname: Debû
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D000465:Algorithms; D001288:Attention / Q000502:physiology; D001307:Auditory Perception / Q000502:physiology; D004314:Down Syndrome / Q000503:physiopathology*; D004569:Electroencephalography; D004576:Electromyography; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology