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ref: Boyd-2004.08 tags: basal ganglia learning implicit explicit lesion stroke date: 05-05-2009 23:14 gmt revision:1 [0] [head]

PMID-15286181[0] Providing explicit information disrupts implicit motor learning after basal ganglia stroke.

  • Evidence suggests that the BG is important for advance preparation of responses in learned sequences of actions; when given knowledge about upcoming responses, healthy subjects used the information to prepare for not only their first, but subsequent movements. Individuals with PD only used advanced infor to prepare for the first movement.
  • Interestingly, evidence is accumulating that in some cases conscious strategies for movement disrupts motor learning.
  • The task here was to perform a contiuous tracking task where the middle third segment was constant between trials. (Performance on this segment was what was measured).
  • As the title says, telling the subjects that the middle third does not change (explicit knowledge) impeded their performance relative to uninformed controls. This was not seen in the matched healthy subjects.
  • They looked at improvement in tracking ability, not the ability itself.

____References____

[0] Boyd LA, Winstein CJ, Providing explicit information disrupts implicit motor learning after basal ganglia stroke.Learn Mem 11:4, 388-96 (2004 Jul-Aug)