Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements
The dorsolateral prefrontal cortex (DLPFC) and the frontal eye fields (FEF) have both been implicated in the executive control of saccades, yet possible dissociable roles of each region have not been established. Specifically, both establishing a task set as well as suppressing an inappropriate resp...
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| Format: | Article |
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Frontiers Media S.A.
2015-11-01
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| Series: | Frontiers in Human Neuroscience |
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| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2015.00613/full |
| _version_ | 1819266558229217280 |
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| author | Ian G.M. Cameron Ian G.M. Cameron Justin M. Riddle Justin M. Riddle Mark eD'Esposito Mark eD'Esposito |
| author_facet | Ian G.M. Cameron Ian G.M. Cameron Justin M. Riddle Justin M. Riddle Mark eD'Esposito Mark eD'Esposito |
| author_sort | Ian G.M. Cameron |
| collection | DOAJ |
| description | The dorsolateral prefrontal cortex (DLPFC) and the frontal eye fields (FEF) have both been implicated in the executive control of saccades, yet possible dissociable roles of each region have not been established. Specifically, both establishing a task set as well as suppressing an inappropriate response have been linked to DLPFC and FEF activity, with behavioral outcome measures of these mechanisms mainly being the percentage of pro-saccade errors made on anti-saccade trials. We used continuous theta-burst stimulation (cTBS) to disrupt FEF or DLPFC function in humans during an anti-saccade task to assess the causal role of these regions in these executive control processes, and in programming saccades towards (pro-saccade) or away (anti-saccade) from visual targets. After right FEF cTBS, as compared to control cTBS to the right primary somatosensory cortex (rS1), anti-saccade amplitude of the first saccade decreased and the number of anti-saccades to acquire final position increased; however direction errors to the visual target were not different. In contrast, after left DLPFC cTBS, as compared to left S1 cTBS, subjects displayed greater direction errors for contralateral anti-saccades; however, there were no impairments on the number of saccades or the saccade amplitude. These results are consistent with the notion that DLPFC is necessary for executive control of saccades, whereas FEF is necessary for visuo-motor aspects of anti-saccade programming. |
| first_indexed | 2024-12-23T21:03:11Z |
| format | Article |
| id | doaj.art-baaf8d13a87842f89969e28ed9caad58 |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-12-23T21:03:11Z |
| publishDate | 2015-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-baaf8d13a87842f89969e28ed9caad582022-12-21T17:31:18ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612015-11-01910.3389/fnhum.2015.00613155382Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movementsIan G.M. Cameron0Ian G.M. Cameron1Justin M. Riddle2Justin M. Riddle3Mark eD'Esposito4Mark eD'Esposito5Donders Institute for Brain, Cognition and BehaviourUniversity of California, BerkeleyUniversity of California, BerkeleyUniversity of California, BerkeleyUniversity of California, BerkeleyUniversity of California, BerkeleyThe dorsolateral prefrontal cortex (DLPFC) and the frontal eye fields (FEF) have both been implicated in the executive control of saccades, yet possible dissociable roles of each region have not been established. Specifically, both establishing a task set as well as suppressing an inappropriate response have been linked to DLPFC and FEF activity, with behavioral outcome measures of these mechanisms mainly being the percentage of pro-saccade errors made on anti-saccade trials. We used continuous theta-burst stimulation (cTBS) to disrupt FEF or DLPFC function in humans during an anti-saccade task to assess the causal role of these regions in these executive control processes, and in programming saccades towards (pro-saccade) or away (anti-saccade) from visual targets. After right FEF cTBS, as compared to control cTBS to the right primary somatosensory cortex (rS1), anti-saccade amplitude of the first saccade decreased and the number of anti-saccades to acquire final position increased; however direction errors to the visual target were not different. In contrast, after left DLPFC cTBS, as compared to left S1 cTBS, subjects displayed greater direction errors for contralateral anti-saccades; however, there were no impairments on the number of saccades or the saccade amplitude. These results are consistent with the notion that DLPFC is necessary for executive control of saccades, whereas FEF is necessary for visuo-motor aspects of anti-saccade programming.http://journal.frontiersin.org/Journal/10.3389/fnhum.2015.00613/fullTranscranial Magnetic Stimulationdorsolateral prefrontal cortexexecutive controltask switchingsaccadeanti-saccade |
| spellingShingle | Ian G.M. Cameron Ian G.M. Cameron Justin M. Riddle Justin M. Riddle Mark eD'Esposito Mark eD'Esposito Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements Frontiers in Human Neuroscience Transcranial Magnetic Stimulation dorsolateral prefrontal cortex executive control task switching saccade anti-saccade |
| title | Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements |
| title_full | Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements |
| title_fullStr | Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements |
| title_full_unstemmed | Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements |
| title_short | Dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements |
| title_sort | dissociable roles of dorsolateral prefrontal cortex and frontal eye fields during saccadic eye movements |
| topic | Transcranial Magnetic Stimulation dorsolateral prefrontal cortex executive control task switching saccade anti-saccade |
| url | http://journal.frontiersin.org/Journal/10.3389/fnhum.2015.00613/full |
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