Explaining response-repetition effects in task switching: evidence from switching cue modality suggests episodic binding and response inhibition

2017 ◽  
Vol 82 (3) ◽  
pp. 570-579 ◽  
Author(s):  
Iring Koch ◽  
Christian Frings ◽  
Stefanie Schuch
Keyword(s):  
Task Switching ◽  
Response Inhibition ◽  
Response Repetition ◽  
Repetition Effects

Basal Ganglia Play a Unique Role in Task Switching within the Frontal-Subcortical Circuits: Evidence from Patients with Focal Lesions

2008 ◽  
Vol 20 (6) ◽  
pp. 1079-1093 ◽  
Author(s):  
Einat Yehene ◽  
Nachshon Meiran ◽  
Nachum Soroker
Keyword(s):  
Basal Ganglia ◽  
Task Switching ◽  
Response Repetition ◽  
Focal Lesions ◽  
Repetition Effects ◽  
Unique Role ◽  
Task Rule ◽  
Abnormal Response ◽  
Mixing Costs

The performance of patients with lesions involving the basal ganglia (BG) was compared to that of patients with prefrontal (PFC) lesions, thalamic (TH) lesions, and age-matched controls in order to examine the specific role of the BG within the frontal-subcortical circuits (FSCC) in task switching. All the BG patients and none of the other participants showed a marked increase in error rate in incongruent trials where correct responses depended upon the choice of the correct task rule. Some BG patients erred in failing to switch tasks and others failed despite their attempt to switch tasks. Additionally, reaction time results indicate abnormal response repetition effects among the BG patients; failure in benefiting from advance task information among all the patients; and increased task mixing costs following PFC lesions. The authors conclude that although the frontal-subcortical circuits jointly determine some behaviors (such as benefiting from preparation), the BG play a unique role within the FSCC in action selection and/or the inhibition of irrelevant information.

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