Experimental Brain Research

, Volume 201, Issue 2, pp 351–358

Sleep has no critical role in implicit motor sequence learning in young and old adults

  • Dezso Nemeth
  • Karolina Janacsek
  • Zsuzsa Londe
  • Michael T. Ullman
  • Darlene V. Howard
  • James H. HowardJr.
Research Note


The influence of sleep on motor skill consolidation has been a research topic of increasing interest. In this study, we distinguished general skill learning from sequence-specific learning in a probabilistic implicit sequence learning task (alternating serial reaction time) in young and old adults before and after a 12-h offline interval which did or did not contain sleep (p.m.–a.m. and a.m.–p.m. groups, respectively). The results showed that general skill learning, as assessed via overall reaction time, improved offline in both the young and older groups, with the young group improving more than the old. However, the improvement was not sleep-dependent, in that there was no difference between the a.m.–p.m. and p.m.–a.m. groups. We did not find sequence-specific offline improvement in either age group for the a.m.–either p.m. or p.m.–a.m. groups, suggesting that consolidation of this kind of implicit motor sequence learning may not be influenced by sleep.


Implicit sequence learning Alternating serial reaction time task Aging Sleep Memory consolidation 


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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Dezso Nemeth
    • 1
    • 2
  • Karolina Janacsek
    • 2
  • Zsuzsa Londe
    • 5
  • Michael T. Ullman
    • 1
  • Darlene V. Howard
    • 3
  • James H. HowardJr.
    • 3
    • 4
  1. 1.Brain and Language Lab, Department of NeuroscienceGeorgetown UniversityWashingtonUSA
  2. 2.Institute of PsychologyUniversity of SzegedSzegedHungary
  3. 3.Department of PsychologyGeorgetown UniversityWashingtonUSA
  4. 4.Department of PsychologyThe Catholic University of AmericaWashingtonUSA
  5. 5.Department of Applied LinguisticsUniversity of CaliforniaLos AngelesUSA

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