The Experts below are selected from a list of 24963 Experts worldwide ranked by ideXlab platform
Justin J Kavanagh - One of the best experts on this subject based on the ideXlab platform.
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medications influencing central cholinergic pathways affect fixation stability saccadic response Time and associated eye movement dynamics during a temporally cued Visual Reaction Time task
Psychopharmacology, 2017Co-Authors: Preshanta Naicker, Shailendra Anoopkumardukie, Gary Grant, Luca Modenese, Justin J KavanaghAbstract:Rationale Anticholinergic medications largely exert their effects due to actions on the muscarinic receptor, which mediates the functions of acetylcholine in the peripheral and central nervous systems. In the central nervous system, acetylcholine plays an important role in the modulation of movement.
Jaques Reifman - One of the best experts on this subject based on the ideXlab platform.
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pc pvt 2 0 an updated platform for psychomotor vigilance task testing analysis prediction and Visualization
Journal of Neuroscience Methods, 2018Co-Authors: Jaques Reifman, Maxim Y Khitrov, Kamal Kumar, Jianbo Liu, Sridhar RamakrishnanAbstract:Abstract Background The psychomotor vigilance task (PVT) has been widely used to assess the effects of sleep deprivation on human neurobehavioral performance. To facilitate research in this field, we previously developed the PC-PVT, a freely available software system analogous to the “gold-standard” PVT-192 that, in addition to allowing for simple Visual Reaction Time (RT) tests, also allows for near real-Time PVT analysis, prediction, and Visualization in a personal computer (PC). New method Here we present the PC-PVT 2.0 for Windows 10 operating system, which has the capability to couple PVT tests of a study protocol with the study’s sleep/wake and caffeine schedules, and make real-Time individualized predictions of PVT performance for such schedules. We characterized the accuracy and precision of the software in measuring RT, using 44 distinct combinations of PC hardware system configurations. Results We found that 15 system configurations measured RTs with an average delay of less than 10 ms, an error comparable to that of the PVT-192. To achieve such small delays, the system configuration should always use a gaming mouse as the means to respond to Visual stimuli. We recommend using a discrete graphical processing unit for desktop PCs and an external monitor for laptop PCs. Comparison with existing method This update integrates a study’s sleep/wake and caffeine schedules with the testing software, facilitating testing and outcome Visualization, and provides near-real-Time individualized PVT predictions for any sleep-loss condition considering caffeine effects. Conclusions The software, with its enhanced PVT analysis, Visualization, and prediction capabilities, can be freely downloaded from https://pcpvt.bhsai.org .
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pc pvt a platform for psychomotor vigilance task testing analysis and prediction
Behavior Research Methods, 2014Co-Authors: Maxim Y Khitrov, Srinivas Laxminarayan, David Thorsley, Sridhar Ramakrishnan, Srinivasan Rajaraman, Nancy J Wesensten, Jaques ReifmanAbstract:Using a personal computer (PC) for simple Visual Reaction Time testing is advantageous because of the relatively low hardware cost, user familiarity, and the relative ease of software development for specific neurobehavioral testing protocols. However, general-purpose computers are not designed with the millisecond-level accuracy of operation required for such applications. Software that does not control for the various sources of delay may return Reaction Time values that are substantially different from the true Reaction Times. We have developed and characterized a freely available system for PC-based simple Visual Reaction Time testing that is analogous to the widely used psychomotor vigilance task (PVT). In addition, we have integrated individualized prediction algorithms for near-real-Time neurobehavioral performance prediction. We characterized the precision and accuracy with which the system as a whole measures Reaction Times on a wide range of computer hardware configurations, comparing its performance with that of the "gold standard" PVT-192 device. We showed that the system is capable of measuring Reaction Times with an average delay of less than 10 ms, a margin of error that is comparable to that of the gold standard. The most critical aspect of hardware selection is the type of mouse used for response detection, with gaming mice showing a significant advantage over standard ones. The software is free to download from http://bhsai.org/downloads/pc-pvt/ .
Preshanta Naicker - One of the best experts on this subject based on the ideXlab platform.
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medications influencing central cholinergic pathways affect fixation stability saccadic response Time and associated eye movement dynamics during a temporally cued Visual Reaction Time task
Psychopharmacology, 2017Co-Authors: Preshanta Naicker, Shailendra Anoopkumardukie, Gary Grant, Luca Modenese, Justin J KavanaghAbstract:Rationale Anticholinergic medications largely exert their effects due to actions on the muscarinic receptor, which mediates the functions of acetylcholine in the peripheral and central nervous systems. In the central nervous system, acetylcholine plays an important role in the modulation of movement.
Sridhar Ramakrishnan - One of the best experts on this subject based on the ideXlab platform.
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pc pvt 2 0 an updated platform for psychomotor vigilance task testing analysis prediction and Visualization
Journal of Neuroscience Methods, 2018Co-Authors: Jaques Reifman, Maxim Y Khitrov, Kamal Kumar, Jianbo Liu, Sridhar RamakrishnanAbstract:Abstract Background The psychomotor vigilance task (PVT) has been widely used to assess the effects of sleep deprivation on human neurobehavioral performance. To facilitate research in this field, we previously developed the PC-PVT, a freely available software system analogous to the “gold-standard” PVT-192 that, in addition to allowing for simple Visual Reaction Time (RT) tests, also allows for near real-Time PVT analysis, prediction, and Visualization in a personal computer (PC). New method Here we present the PC-PVT 2.0 for Windows 10 operating system, which has the capability to couple PVT tests of a study protocol with the study’s sleep/wake and caffeine schedules, and make real-Time individualized predictions of PVT performance for such schedules. We characterized the accuracy and precision of the software in measuring RT, using 44 distinct combinations of PC hardware system configurations. Results We found that 15 system configurations measured RTs with an average delay of less than 10 ms, an error comparable to that of the PVT-192. To achieve such small delays, the system configuration should always use a gaming mouse as the means to respond to Visual stimuli. We recommend using a discrete graphical processing unit for desktop PCs and an external monitor for laptop PCs. Comparison with existing method This update integrates a study’s sleep/wake and caffeine schedules with the testing software, facilitating testing and outcome Visualization, and provides near-real-Time individualized PVT predictions for any sleep-loss condition considering caffeine effects. Conclusions The software, with its enhanced PVT analysis, Visualization, and prediction capabilities, can be freely downloaded from https://pcpvt.bhsai.org .
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pc pvt a platform for psychomotor vigilance task testing analysis and prediction
Behavior Research Methods, 2014Co-Authors: Maxim Y Khitrov, Srinivas Laxminarayan, David Thorsley, Sridhar Ramakrishnan, Srinivasan Rajaraman, Nancy J Wesensten, Jaques ReifmanAbstract:Using a personal computer (PC) for simple Visual Reaction Time testing is advantageous because of the relatively low hardware cost, user familiarity, and the relative ease of software development for specific neurobehavioral testing protocols. However, general-purpose computers are not designed with the millisecond-level accuracy of operation required for such applications. Software that does not control for the various sources of delay may return Reaction Time values that are substantially different from the true Reaction Times. We have developed and characterized a freely available system for PC-based simple Visual Reaction Time testing that is analogous to the widely used psychomotor vigilance task (PVT). In addition, we have integrated individualized prediction algorithms for near-real-Time neurobehavioral performance prediction. We characterized the precision and accuracy with which the system as a whole measures Reaction Times on a wide range of computer hardware configurations, comparing its performance with that of the "gold standard" PVT-192 device. We showed that the system is capable of measuring Reaction Times with an average delay of less than 10 ms, a margin of error that is comparable to that of the gold standard. The most critical aspect of hardware selection is the type of mouse used for response detection, with gaming mice showing a significant advantage over standard ones. The software is free to download from http://bhsai.org/downloads/pc-pvt/ .
Maxim Y Khitrov - One of the best experts on this subject based on the ideXlab platform.
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pc pvt 2 0 an updated platform for psychomotor vigilance task testing analysis prediction and Visualization
Journal of Neuroscience Methods, 2018Co-Authors: Jaques Reifman, Maxim Y Khitrov, Kamal Kumar, Jianbo Liu, Sridhar RamakrishnanAbstract:Abstract Background The psychomotor vigilance task (PVT) has been widely used to assess the effects of sleep deprivation on human neurobehavioral performance. To facilitate research in this field, we previously developed the PC-PVT, a freely available software system analogous to the “gold-standard” PVT-192 that, in addition to allowing for simple Visual Reaction Time (RT) tests, also allows for near real-Time PVT analysis, prediction, and Visualization in a personal computer (PC). New method Here we present the PC-PVT 2.0 for Windows 10 operating system, which has the capability to couple PVT tests of a study protocol with the study’s sleep/wake and caffeine schedules, and make real-Time individualized predictions of PVT performance for such schedules. We characterized the accuracy and precision of the software in measuring RT, using 44 distinct combinations of PC hardware system configurations. Results We found that 15 system configurations measured RTs with an average delay of less than 10 ms, an error comparable to that of the PVT-192. To achieve such small delays, the system configuration should always use a gaming mouse as the means to respond to Visual stimuli. We recommend using a discrete graphical processing unit for desktop PCs and an external monitor for laptop PCs. Comparison with existing method This update integrates a study’s sleep/wake and caffeine schedules with the testing software, facilitating testing and outcome Visualization, and provides near-real-Time individualized PVT predictions for any sleep-loss condition considering caffeine effects. Conclusions The software, with its enhanced PVT analysis, Visualization, and prediction capabilities, can be freely downloaded from https://pcpvt.bhsai.org .
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pc pvt a platform for psychomotor vigilance task testing analysis and prediction
Behavior Research Methods, 2014Co-Authors: Maxim Y Khitrov, Srinivas Laxminarayan, David Thorsley, Sridhar Ramakrishnan, Srinivasan Rajaraman, Nancy J Wesensten, Jaques ReifmanAbstract:Using a personal computer (PC) for simple Visual Reaction Time testing is advantageous because of the relatively low hardware cost, user familiarity, and the relative ease of software development for specific neurobehavioral testing protocols. However, general-purpose computers are not designed with the millisecond-level accuracy of operation required for such applications. Software that does not control for the various sources of delay may return Reaction Time values that are substantially different from the true Reaction Times. We have developed and characterized a freely available system for PC-based simple Visual Reaction Time testing that is analogous to the widely used psychomotor vigilance task (PVT). In addition, we have integrated individualized prediction algorithms for near-real-Time neurobehavioral performance prediction. We characterized the precision and accuracy with which the system as a whole measures Reaction Times on a wide range of computer hardware configurations, comparing its performance with that of the "gold standard" PVT-192 device. We showed that the system is capable of measuring Reaction Times with an average delay of less than 10 ms, a margin of error that is comparable to that of the gold standard. The most critical aspect of hardware selection is the type of mouse used for response detection, with gaming mice showing a significant advantage over standard ones. The software is free to download from http://bhsai.org/downloads/pc-pvt/ .
