TY - JOUR
T1 - P1086: DLPFC and left supramarginal gyrus increases the recognition of instrumental and functional violations in transitive action representation
AU - Balconi, Michela
AU - Canavesio, Ylenia
AU - 27256,
AU - FACOLTA', DI PSICOLOGIA
AU - Psicologia, MILANO - Dipartimento di
PY - 2014
Y1 - 2014
N2 - The correct outcome of transitive actions depends on an object’s, use considering both the instrumental and functional features. Indeed, the representation of object-related action includes the correct/incorrect instrumental use and the congruous/incongruous functional use of the object.
Objectives: The contribution of frontal (dorsolateral prefrontal cortex, DLPFC, experiment 1) and posterior supramarginal gyrus, experiment 2)
areas to process these semantic violations (instrumental vs. functional) in action semantic representation was explored.
Methods: The DLPFC and supramarginal gyrus activity was appositely modulated by tDCS (transcranial direct current stimulation). The effect of tDCS (anodal, excitatory) when subjects processed congruous/incongruous object-related actions was verified by measuring the modulation of the ERs (Error Rates) and RTs (Response Times). Forty-three subjects performed the detection task within a dynamic context (video tapes representing a sequence of four action frames ending with a congruous vs. incongruous action).
Results: Significantly decreased RTs were observed for incongruous stimuli
in the case of DLPFC stimulation compared to the sham condition. This
effect was related to both the instrumental and functional semantic violations, suggesting that the activation of the DLPFC may increase the ability to analyse the semantic anomaly independently from the anomaly type, which would limit the cognitive costs. In contrast, parietal stimulation
reduced RTs only in response to functional semantic violations.
Conclusion: Thus, different cortical contributions by anterior vs. posterior
areas occurred in response to semantic anomalies respectively for generic
expectancy violations (more frontally distributed) and specific functional
violations (more frontally distributed).
AB - The correct outcome of transitive actions depends on an object’s, use considering both the instrumental and functional features. Indeed, the representation of object-related action includes the correct/incorrect instrumental use and the congruous/incongruous functional use of the object.
Objectives: The contribution of frontal (dorsolateral prefrontal cortex, DLPFC, experiment 1) and posterior supramarginal gyrus, experiment 2)
areas to process these semantic violations (instrumental vs. functional) in action semantic representation was explored.
Methods: The DLPFC and supramarginal gyrus activity was appositely modulated by tDCS (transcranial direct current stimulation). The effect of tDCS (anodal, excitatory) when subjects processed congruous/incongruous object-related actions was verified by measuring the modulation of the ERs (Error Rates) and RTs (Response Times). Forty-three subjects performed the detection task within a dynamic context (video tapes representing a sequence of four action frames ending with a congruous vs. incongruous action).
Results: Significantly decreased RTs were observed for incongruous stimuli
in the case of DLPFC stimulation compared to the sham condition. This
effect was related to both the instrumental and functional semantic violations, suggesting that the activation of the DLPFC may increase the ability to analyse the semantic anomaly independently from the anomaly type, which would limit the cognitive costs. In contrast, parietal stimulation
reduced RTs only in response to functional semantic violations.
Conclusion: Thus, different cortical contributions by anterior vs. posterior
areas occurred in response to semantic anomalies respectively for generic
expectancy violations (more frontally distributed) and specific functional
violations (more frontally distributed).
KW - Action representation
KW - DLPFC
KW - Supramarginal gyrus
KW - Action representation
KW - DLPFC
KW - Supramarginal gyrus
UR - http://hdl.handle.net/10807/64607
U2 - 10.1016/S1388-2457(14)51114-5
DO - 10.1016/S1388-2457(14)51114-5
M3 - Conference article
VL - 125
SP - S338-S338
JO - Clinical Neurophysiology
JF - Clinical Neurophysiology
SN - 1388-2457
T2 - 30th International Congress of Clinical Neurophysiology (ICCN) of the IFCN
Y2 - 20 March 2014 through 23 March 2014
ER -