The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform

Vorasith Siripornpanich - One of the best experts on this subject based on the ideXlab platform.

  • Effects of a 20-min Nap after Sleep Deprivation on Brain Activity and Soccer Performance.
    International journal of sports medicine, 2020
    Co-Authors: Amornpan Ajjimaporn, Papatsorn Ramyarangsi, Vorasith Siripornpanich
    Abstract:

    We examined effects of a 20-min nap following 3 h of sleep deprivation on brain wave activity, Auditory Reaction Time, the running-based anaerobic sprint test, leg muscle strength and the rating of perceived exertion in male college soccer players. Eleven players underwent three sleep conditions; normal sleep, sleep deprivation and 20-min nap after sleep deprivation. The sleep deprivation demonstrated an increase in the mean power of delta waves over the frontal area and a decrease in the mean power of alpha waves over the parietal area compared to the normal sleep. The nap and the sleep deprivation showed an increase in Auditory Reaction Time compared with those in the normal sleep. The sleep deprivation demonstrated a decrease in the running-based anaerobic sprint test compared to the normal sleep, whereas the nap has partially reversed only minimal power and average power of the running-based anaerobic sprint test. The nap showed a recovery effect on leg muscle strength, but not on the rating of perceived exertion compared with the sleep deprivation. Thus, a 20-min nap after sleep deprivation did not completely return brain activity back to active state and did not entirely reverse the negative impact of sleep deprivation on soccer performance in soccer players.

Amornpan Ajjimaporn - One of the best experts on this subject based on the ideXlab platform.

  • Effects of a 20-min Nap after Sleep Deprivation on Brain Activity and Soccer Performance.
    International journal of sports medicine, 2020
    Co-Authors: Amornpan Ajjimaporn, Papatsorn Ramyarangsi, Vorasith Siripornpanich
    Abstract:

    We examined effects of a 20-min nap following 3 h of sleep deprivation on brain wave activity, Auditory Reaction Time, the running-based anaerobic sprint test, leg muscle strength and the rating of perceived exertion in male college soccer players. Eleven players underwent three sleep conditions; normal sleep, sleep deprivation and 20-min nap after sleep deprivation. The sleep deprivation demonstrated an increase in the mean power of delta waves over the frontal area and a decrease in the mean power of alpha waves over the parietal area compared to the normal sleep. The nap and the sleep deprivation showed an increase in Auditory Reaction Time compared with those in the normal sleep. The sleep deprivation demonstrated a decrease in the running-based anaerobic sprint test compared to the normal sleep, whereas the nap has partially reversed only minimal power and average power of the running-based anaerobic sprint test. The nap showed a recovery effect on leg muscle strength, but not on the rating of perceived exertion compared with the sleep deprivation. Thus, a 20-min nap after sleep deprivation did not completely return brain activity back to active state and did not entirely reverse the negative impact of sleep deprivation on soccer performance in soccer players.

Miloslav Kukleta - One of the best experts on this subject based on the ideXlab platform.

  • Hippocampal P300 recorded during a simple Auditory Reaction Time task (intracerebral study).
    Frontiers in Human Neuroscience, 2011
    Co-Authors: Robert Roman, Jan Chládek, Milan Brázdil, Ivan Rektor, Pavel Jurák, Miloslav Kukleta
    Abstract:

    This paper attempts to make possible Time relationship of hippocampal P300, evoked by 1 kHz tone during a simple sensorimotor task, to stimulus or motor response. In 9 patients with medically intractable epilepsies, depth electrodes were implanted to localize the seizure origin prior to surgical treatment. 19 of 70 electrodes were targeted into the hippocampus. Each subject was instructed to respond to the 1 kHz tone by pressing a button in the dominant hand. P300 components recorded in the hippocampus were analyzed both in stimulus-locked and response-locked averages, which were separately averaged for fast and slow responses. Local generation of hippocampal P300 was demonstrated in all 19 electrodes. The mean latency was 415 ms (SD=58 ms), the mean amplitude was 108 mV (SD=87 mV). Three different types of Time relationships of hippocampal P300 were found: 1) Time-locked to the stimulus - in 12 cases/6 patients; 2) Time-locked to the motor response - in 2 cases/1 patient; and 3) ambiguous Time relationship to stimulus and motor response - in 5 cases/3 patients. The three types of relationships were found in both left and right hemispheres. Our results show that the hippocampus in all the patients evoked a response during a simple sensorimotor task. The finding of the three different types of Time relationships to stimulus and to motor response is in accordance with the results we obtained during visual oddball task. It may suggest that at least certain parts of this structure are involved in simple sensorimotor tasks in all steps of information processing

  • Component N400 Can Be Demonstrated In The Event-related Potential From a Simple Auditory Reaction Time Paradigm
    Activitas Nervosa Superior, 2009
    Co-Authors: Miloslav Kukleta, Michel Lamarche, Jacques Louvel
    Abstract:

    The aim of the present study was to propose and test an experimental design enabling to synchronize simultaneously both signal-and movement-related processes in a simple sensorimotor task. Seventeen healthy volunteers were asked to flex their right wrist after the presentation of an Auditory signal (tone burst of 1kHz, 200 ms duration; intersignal interval between 7–9 s). In total, 2179 collected records were divided according to the same length of the signal-movement interval into 38 Time groups and the average curve for each Time group was calculated. The event-related potential from all these Time groups exhibited two prominent negative waves over the frontocentral region. The first one, with a mean peak latency of 110 ms, exhibited characteristics of the N1 component of cortical Auditory evoked potential. Analysis of data concerning the second negative wave pointed to its dependence on both sensory and motor underlying processes. The increasing slope of the wave represented its sensory part. It started in all the Time groups approximately at the same Time points and was not influenced by variations of S-R interval. An estimate of its peak latency was approximately 400 ms. In Time groups with S-R intervals shorter than 300 ms this N400 component was located on the Time axis after the movement, i.e. when the instructed task had already been accomplished. The next portion of the second negative wave, i.e. the slow increase of amplitude to its peak value and the following decrease of the wave, exhibited a clear-cut dependence on movement.

  • Component N400 Can Be Demonstrated In The Event-related Potential From a Simple Auditory Reaction Time Paradigm
    Activitas Nervosa Superior, 2009
    Co-Authors: Miloslav Kukleta, Mathieu Lamarche, Jacques Louvel
    Abstract:

    The study describes N400 component in the event-related potential recorded in a simple Auditory Reaction Time paradigm

Papatsorn Ramyarangsi - One of the best experts on this subject based on the ideXlab platform.

  • Effects of a 20-min Nap after Sleep Deprivation on Brain Activity and Soccer Performance.
    International journal of sports medicine, 2020
    Co-Authors: Amornpan Ajjimaporn, Papatsorn Ramyarangsi, Vorasith Siripornpanich
    Abstract:

    We examined effects of a 20-min nap following 3 h of sleep deprivation on brain wave activity, Auditory Reaction Time, the running-based anaerobic sprint test, leg muscle strength and the rating of perceived exertion in male college soccer players. Eleven players underwent three sleep conditions; normal sleep, sleep deprivation and 20-min nap after sleep deprivation. The sleep deprivation demonstrated an increase in the mean power of delta waves over the frontal area and a decrease in the mean power of alpha waves over the parietal area compared to the normal sleep. The nap and the sleep deprivation showed an increase in Auditory Reaction Time compared with those in the normal sleep. The sleep deprivation demonstrated a decrease in the running-based anaerobic sprint test compared to the normal sleep, whereas the nap has partially reversed only minimal power and average power of the running-based anaerobic sprint test. The nap showed a recovery effect on leg muscle strength, but not on the rating of perceived exertion compared with the sleep deprivation. Thus, a 20-min nap after sleep deprivation did not completely return brain activity back to active state and did not entirely reverse the negative impact of sleep deprivation on soccer performance in soccer players.

Abigail. Hibbs - One of the best experts on this subject based on the ideXlab platform.

  • Sprint starts and the minimum Auditory Reaction Time
    Journal of sports sciences, 2007
    Co-Authors: Matthew T.g. Pain, Abigail. Hibbs
    Abstract:

    The simple Auditory Reaction Time is one of the fastest Reaction Times and is thought to be rarely less than 100 ms. The current false start criterion in a sprint used by the International Association of Athletics Federations is based on this assumed Auditory Reaction Time of 100 ms. However, there is evidence, both anecdotal and from reflex research, that simple Auditory Reaction Times of less than 100 ms can be achieved. Reaction Time in nine athletes performing sprint starts in four conditions was measured using starting blocks instrumented with piezoelectric force transducers in each footplate that were synchronized with the starting signal. Only three conditions were used to calculate Reaction Times. The pre-motor and pseudo-motor Time for two athletes were also measured across 13 muscles using surface electromyography (EMG) synchronized with the rest of the system. Five of the athletes had mean Reaction Times of less than 100 ms in at least one condition and 20% of all starts in the first two conditions had a Reaction Time of less than 100 ms. The results demonstrate that the neuromuscular-physiological component of simple Auditory Reaction Times can be under 85 ms and that EMG latencies can be under 60 ms.