Effects of Methylphenidate on performance of a practical pistol shooting task: a quantitative electroencephalography

Background The present study examined absolute alpha power using quantitative electroencephalogram (qEEG) in bilateral temporal and parietal cortices in novice soldiers under the influence of methylphenidate (MPH) during the preparatory aiming period in a practical pistol-shooting task. We anticipat...

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Veröffentlicht in:International archives of medicine 2011-02, Vol.4, p.6
Hauptverfasser: Norwood, Braxton A, Arias-Carrión, Oscar, Skaper, Stephen D, Kerick, Scott, Ribeiro, Pedro, Domingues, Clayton Amaral, Basile, Luis FH, Menéndez-González, Manuel, Machado, Sergio, Cagy, Mauricio, Nardi, Antonio Egídio, Cunha, Marlo, Minc, Daniel, Paes, Flávia, Piedade, Roberto, Budde, Henning, Teixeira, Silmar, Velasques, Bruna
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container_issue
container_start_page 6
container_title International archives of medicine
container_volume 4
creator Norwood, Braxton A
Arias-Carrión, Oscar
Skaper, Stephen D
Kerick, Scott
Ribeiro, Pedro
Domingues, Clayton Amaral
Basile, Luis FH
Menéndez-González, Manuel
Machado, Sergio
Cagy, Mauricio
Nardi, Antonio Egídio
Cunha, Marlo
Minc, Daniel
Paes, Flávia
Piedade, Roberto
Budde, Henning
Teixeira, Silmar
Velasques, Bruna
description Background The present study examined absolute alpha power using quantitative electroencephalogram (qEEG) in bilateral temporal and parietal cortices in novice soldiers under the influence of methylphenidate (MPH) during the preparatory aiming period in a practical pistol-shooting task. We anticipated higher bi-hemispheric cortical activation in the preparatory period relative to pre-shot baseline in the methylphenidate group when compared with the control group because methylphenidate has been shown to enhance task-related cognitive functions. Methods Twenty healthy, novice soldiers were equally distributed in control (CG; n = 10) and MPH groups 10 mg (MG; n = 10) using a randomized, double blind design. Subjects performed a pistol-shooting task while electroencephalographic activity was acquired. Results We found main effects for group and practice blocks on behavioral measures, and interactions between group and phases on electroencephalographic measures for the electrodes T3, T4, P3 and P4. Regarding the behavioral measures, the MPH group demonstrated significantly poorer in shooting performance when compared with the control and, in addition, significant increases in the scores over practice blocks were found on both groups. In addition, regarding the electroencephalographic data, we observed a significant increase in alpha power over practice blocks, but alpha power was significantly lower for the MPH group when compared with the placebo group. Moreover, we observed a significant decrease in alpha power in electrodes T4 and P4 during PTM. Conclusion Although we found no correlation between behavioral and EEG data, our findings show that MPH did not prevent the learning of the task in healthy subjects. However, during the practice blocks (PBs) it also did not favor the performance when compared with control group performance. It seems that the CNS effects of MPH demanded an initial readjustment period of integrated operations relative to the sensorimotor system. In other words, MPH seems to provoke a period of initial instability due to a possible modulation in neural activity, which can be explained by lower levels of alpha power (i.e., higher cortical activity). However, after the end of the PB.sub.1 a new stabilization was established in neural circuits, due to repetition of the task, resulting higher cortical activity during the task. In conclusion, MPH group performance was not initially superior to that of the control group, but eventually excee
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We anticipated higher bi-hemispheric cortical activation in the preparatory period relative to pre-shot baseline in the methylphenidate group when compared with the control group because methylphenidate has been shown to enhance task-related cognitive functions. Methods Twenty healthy, novice soldiers were equally distributed in control (CG; n = 10) and MPH groups 10 mg (MG; n = 10) using a randomized, double blind design. Subjects performed a pistol-shooting task while electroencephalographic activity was acquired. Results We found main effects for group and practice blocks on behavioral measures, and interactions between group and phases on electroencephalographic measures for the electrodes T3, T4, P3 and P4. Regarding the behavioral measures, the MPH group demonstrated significantly poorer in shooting performance when compared with the control and, in addition, significant increases in the scores over practice blocks were found on both groups. In addition, regarding the electroencephalographic data, we observed a significant increase in alpha power over practice blocks, but alpha power was significantly lower for the MPH group when compared with the placebo group. Moreover, we observed a significant decrease in alpha power in electrodes T4 and P4 during PTM. Conclusion Although we found no correlation between behavioral and EEG data, our findings show that MPH did not prevent the learning of the task in healthy subjects. However, during the practice blocks (PBs) it also did not favor the performance when compared with control group performance. It seems that the CNS effects of MPH demanded an initial readjustment period of integrated operations relative to the sensorimotor system. In other words, MPH seems to provoke a period of initial instability due to a possible modulation in neural activity, which can be explained by lower levels of alpha power (i.e., higher cortical activity). However, after the end of the PB.sub.1 a new stabilization was established in neural circuits, due to repetition of the task, resulting higher cortical activity during the task. In conclusion, MPH group performance was not initially superior to that of the control group, but eventually exceeded it, albeit without achieving statistical significance.</description><identifier>ISSN: 1755-7682</identifier><identifier>EISSN: 1755-7682</identifier><language>eng</language><publisher>BioMed Central Ltd</publisher><subject>Cognition ; Electroencephalography ; Health aspects ; Methylphenidate ; Methylphenidate hydrochloride ; Shooting, Military</subject><ispartof>International archives of medicine, 2011-02, Vol.4, p.6</ispartof><rights>COPYRIGHT 2011 BioMed Central Ltd.</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785</link.rule.ids></links><search><creatorcontrib>Norwood, Braxton A</creatorcontrib><creatorcontrib>Arias-Carrión, Oscar</creatorcontrib><creatorcontrib>Skaper, Stephen D</creatorcontrib><creatorcontrib>Kerick, Scott</creatorcontrib><creatorcontrib>Ribeiro, Pedro</creatorcontrib><creatorcontrib>Domingues, Clayton Amaral</creatorcontrib><creatorcontrib>Basile, Luis FH</creatorcontrib><creatorcontrib>Menéndez-González, Manuel</creatorcontrib><creatorcontrib>Machado, Sergio</creatorcontrib><creatorcontrib>Cagy, Mauricio</creatorcontrib><creatorcontrib>Nardi, Antonio Egídio</creatorcontrib><creatorcontrib>Cunha, Marlo</creatorcontrib><creatorcontrib>Minc, Daniel</creatorcontrib><creatorcontrib>Paes, Flávia</creatorcontrib><creatorcontrib>Piedade, Roberto</creatorcontrib><creatorcontrib>Budde, Henning</creatorcontrib><creatorcontrib>Teixeira, Silmar</creatorcontrib><creatorcontrib>Velasques, Bruna</creatorcontrib><title>Effects of Methylphenidate on performance of a practical pistol shooting task: a quantitative electroencephalography</title><title>International archives of medicine</title><description>Background The present study examined absolute alpha power using quantitative electroencephalogram (qEEG) in bilateral temporal and parietal cortices in novice soldiers under the influence of methylphenidate (MPH) during the preparatory aiming period in a practical pistol-shooting task. We anticipated higher bi-hemispheric cortical activation in the preparatory period relative to pre-shot baseline in the methylphenidate group when compared with the control group because methylphenidate has been shown to enhance task-related cognitive functions. Methods Twenty healthy, novice soldiers were equally distributed in control (CG; n = 10) and MPH groups 10 mg (MG; n = 10) using a randomized, double blind design. Subjects performed a pistol-shooting task while electroencephalographic activity was acquired. Results We found main effects for group and practice blocks on behavioral measures, and interactions between group and phases on electroencephalographic measures for the electrodes T3, T4, P3 and P4. Regarding the behavioral measures, the MPH group demonstrated significantly poorer in shooting performance when compared with the control and, in addition, significant increases in the scores over practice blocks were found on both groups. In addition, regarding the electroencephalographic data, we observed a significant increase in alpha power over practice blocks, but alpha power was significantly lower for the MPH group when compared with the placebo group. Moreover, we observed a significant decrease in alpha power in electrodes T4 and P4 during PTM. Conclusion Although we found no correlation between behavioral and EEG data, our findings show that MPH did not prevent the learning of the task in healthy subjects. However, during the practice blocks (PBs) it also did not favor the performance when compared with control group performance. It seems that the CNS effects of MPH demanded an initial readjustment period of integrated operations relative to the sensorimotor system. In other words, MPH seems to provoke a period of initial instability due to a possible modulation in neural activity, which can be explained by lower levels of alpha power (i.e., higher cortical activity). However, after the end of the PB.sub.1 a new stabilization was established in neural circuits, due to repetition of the task, resulting higher cortical activity during the task. In conclusion, MPH group performance was not initially superior to that of the control group, but eventually exceeded it, albeit without achieving statistical significance.</description><subject>Cognition</subject><subject>Electroencephalography</subject><subject>Health aspects</subject><subject>Methylphenidate</subject><subject>Methylphenidate hydrochloride</subject><subject>Shooting, Military</subject><issn>1755-7682</issn><issn>1755-7682</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNqNjjFPAkEQhTdGEhD4D1PZkcBxHGBnCMbGzp5MjtnbhWFn3RlM-PeciYWl1XvF9728BzdarFer2brZVI9_-tA9qZ7m82axqZuRs7331JqCePggCzfOgVI8ohFIgkzFS7lgaumHQMgFW4stMuSoJgwaRCymDgz1_NITX1dMFg0tfhMQ9-NFqPdzQJauYA63iRt4ZKXpb47d89v-c_c-65DpEAjZggpfLUrSw2tVb-v-el0t_w3eAfI9UUE</recordid><startdate>20110204</startdate><enddate>20110204</enddate><creator>Norwood, Braxton A</creator><creator>Arias-Carrión, Oscar</creator><creator>Skaper, Stephen D</creator><creator>Kerick, Scott</creator><creator>Ribeiro, Pedro</creator><creator>Domingues, Clayton Amaral</creator><creator>Basile, Luis FH</creator><creator>Menéndez-González, Manuel</creator><creator>Machado, Sergio</creator><creator>Cagy, Mauricio</creator><creator>Nardi, Antonio Egídio</creator><creator>Cunha, Marlo</creator><creator>Minc, Daniel</creator><creator>Paes, Flávia</creator><creator>Piedade, Roberto</creator><creator>Budde, Henning</creator><creator>Teixeira, Silmar</creator><creator>Velasques, Bruna</creator><general>BioMed Central Ltd</general><scope/></search><sort><creationdate>20110204</creationdate><title>Effects of Methylphenidate on performance of a practical pistol shooting task: a quantitative electroencephalography</title><author>Norwood, Braxton A ; Arias-Carrión, Oscar ; Skaper, Stephen D ; Kerick, Scott ; Ribeiro, Pedro ; Domingues, Clayton Amaral ; Basile, Luis FH ; Menéndez-González, Manuel ; Machado, Sergio ; Cagy, Mauricio ; Nardi, Antonio Egídio ; Cunha, Marlo ; Minc, Daniel ; Paes, Flávia ; Piedade, Roberto ; Budde, Henning ; Teixeira, Silmar ; Velasques, Bruna</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-gale_healthsolutions_A2494768423</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Cognition</topic><topic>Electroencephalography</topic><topic>Health aspects</topic><topic>Methylphenidate</topic><topic>Methylphenidate hydrochloride</topic><topic>Shooting, Military</topic><toplevel>online_resources</toplevel><creatorcontrib>Norwood, Braxton A</creatorcontrib><creatorcontrib>Arias-Carrión, Oscar</creatorcontrib><creatorcontrib>Skaper, Stephen D</creatorcontrib><creatorcontrib>Kerick, Scott</creatorcontrib><creatorcontrib>Ribeiro, Pedro</creatorcontrib><creatorcontrib>Domingues, Clayton Amaral</creatorcontrib><creatorcontrib>Basile, Luis FH</creatorcontrib><creatorcontrib>Menéndez-González, Manuel</creatorcontrib><creatorcontrib>Machado, Sergio</creatorcontrib><creatorcontrib>Cagy, Mauricio</creatorcontrib><creatorcontrib>Nardi, Antonio Egídio</creatorcontrib><creatorcontrib>Cunha, Marlo</creatorcontrib><creatorcontrib>Minc, Daniel</creatorcontrib><creatorcontrib>Paes, Flávia</creatorcontrib><creatorcontrib>Piedade, Roberto</creatorcontrib><creatorcontrib>Budde, Henning</creatorcontrib><creatorcontrib>Teixeira, Silmar</creatorcontrib><creatorcontrib>Velasques, Bruna</creatorcontrib><jtitle>International archives of medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Norwood, Braxton A</au><au>Arias-Carrión, Oscar</au><au>Skaper, Stephen D</au><au>Kerick, Scott</au><au>Ribeiro, Pedro</au><au>Domingues, Clayton Amaral</au><au>Basile, Luis FH</au><au>Menéndez-González, Manuel</au><au>Machado, Sergio</au><au>Cagy, Mauricio</au><au>Nardi, Antonio Egídio</au><au>Cunha, Marlo</au><au>Minc, Daniel</au><au>Paes, Flávia</au><au>Piedade, Roberto</au><au>Budde, Henning</au><au>Teixeira, Silmar</au><au>Velasques, Bruna</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Methylphenidate on performance of a practical pistol shooting task: a quantitative electroencephalography</atitle><jtitle>International archives of medicine</jtitle><date>2011-02-04</date><risdate>2011</risdate><volume>4</volume><spage>6</spage><pages>6-</pages><issn>1755-7682</issn><eissn>1755-7682</eissn><abstract>Background The present study examined absolute alpha power using quantitative electroencephalogram (qEEG) in bilateral temporal and parietal cortices in novice soldiers under the influence of methylphenidate (MPH) during the preparatory aiming period in a practical pistol-shooting task. We anticipated higher bi-hemispheric cortical activation in the preparatory period relative to pre-shot baseline in the methylphenidate group when compared with the control group because methylphenidate has been shown to enhance task-related cognitive functions. Methods Twenty healthy, novice soldiers were equally distributed in control (CG; n = 10) and MPH groups 10 mg (MG; n = 10) using a randomized, double blind design. Subjects performed a pistol-shooting task while electroencephalographic activity was acquired. Results We found main effects for group and practice blocks on behavioral measures, and interactions between group and phases on electroencephalographic measures for the electrodes T3, T4, P3 and P4. Regarding the behavioral measures, the MPH group demonstrated significantly poorer in shooting performance when compared with the control and, in addition, significant increases in the scores over practice blocks were found on both groups. In addition, regarding the electroencephalographic data, we observed a significant increase in alpha power over practice blocks, but alpha power was significantly lower for the MPH group when compared with the placebo group. Moreover, we observed a significant decrease in alpha power in electrodes T4 and P4 during PTM. Conclusion Although we found no correlation between behavioral and EEG data, our findings show that MPH did not prevent the learning of the task in healthy subjects. However, during the practice blocks (PBs) it also did not favor the performance when compared with control group performance. It seems that the CNS effects of MPH demanded an initial readjustment period of integrated operations relative to the sensorimotor system. In other words, MPH seems to provoke a period of initial instability due to a possible modulation in neural activity, which can be explained by lower levels of alpha power (i.e., higher cortical activity). However, after the end of the PB.sub.1 a new stabilization was established in neural circuits, due to repetition of the task, resulting higher cortical activity during the task. In conclusion, MPH group performance was not initially superior to that of the control group, but eventually exceeded it, albeit without achieving statistical significance.</abstract><pub>BioMed Central Ltd</pub></addata></record>
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subjects Cognition
Electroencephalography
Health aspects
Methylphenidate
Methylphenidate hydrochloride
Shooting, Military
title Effects of Methylphenidate on performance of a practical pistol shooting task: a quantitative electroencephalography
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