choice reaction time
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Author(s):  
Kanch Sharma ◽  
Sean James Fallon ◽  
Thomas Davis ◽  
Scott Ankrett ◽  
Greg Munro ◽  
...  

Abstract Introduction Caffeine is frequently consumed to boost goal-directed attention. These procognitive effects may occur due to the adenosine-mediated enhancement of monoamines, such as dopamine, after caffeine administration. As such, caffeine’s beneficial effects may be altered in conditions such as Parkinson’s disease (PD). However, whether caffeine improves cognition, and at what cost, has not been experimentally established in patients with neurodegenerative disease. Methods Single-dose trials to probe cognitive effects of caffeine are often confounded by short-term caffeine abstinence which conflates caffeine’s effects with treatment of withdrawal. Using a placebo controlled, blinded, randomised trial design, we assessed the effect of 100 mg of caffeine across well-established tasks (Choice reaction time, Stroop Task and Rapid Serial Visual Presentation Task; RSVP) that probe different aspects of attention in PD patients (n = 24) and controls (n = 44). Critically, participants withdrew from caffeine for a week prior to testing to eliminate the possibility that withdrawal reversal explained any cognitive benefit. Results Caffeine administration was found to reduce the overall number of errors in patients and controls on the Stroop (p = .018, η2p = .086) and Choice reaction time (p < . 0001, η2p = .588) tasks, but there was no specific effect of caffeine on ignoring irrelevant information in the Stroop task. On the RSVP task, caffeine improved dual item accuracy (p = .037) but impaired single item accuracy (p = .044). Across all tasks, there was little evidence that caffeine has different effects in PD participants and controls. Conclusion When removing withdrawal effects as a factor, we demonstrate caffeine has beneficial effects on selective attention but is a double-edge sword for visual temporal attention and would need careful targeting to be clinically useful.


2022 ◽  
Vol 23 (2) ◽  
pp. 21-27
Author(s):  
Tamise Caires ◽  
Gustavo Luvizutto ◽  
Paula Vieira ◽  
Gabriel Jablonski ◽  
Rodrigo Bazan ◽  
...  

Neurology ◽  
2021 ◽  
Vol 98 (1 Supplement 1) ◽  
pp. S23.3-S24
Author(s):  
Matthew Michael Antonucci ◽  
Emily Kalambaheti ◽  
Derek Barton ◽  
Shaun Kornfeld ◽  
Kenneth Jay

ObjectiveTo present the evaluation of 12 rehabilitation cases as a case series in sports-related concussion.BackgroundSport-related concussion is a common injury in the NHL. While most athletes recover within few weeks of sustaining a mild head injury, some still experience persistent symptoms for months or years after following recommended recovery and return to play guidelines.Design/MethodsTwelve male NHL athletes (6/6 active/retired; mean age/height/weight/symptom duration/#concussions [SD]: 33.4 years [7.9]: 185.8 cm [5.1]: 94.8 kg [14.6]; 121 wks: [156]; 4.3 [2.3]) with persistent but mild post-concussion symptoms were treated for 10 sessions at an outpatient neurorehabilitation center specializing in functional neurology. The athletes were evaluated before- and after treatment utilizing the C3 Logix platform. The interventions included joint manipulation, neuromuscular re-education, vestibular rehabilitation in a whole-body off-axis rotational device, orthoptic exercises, and cognitive training. Graded Symptoms Checklist (0–162), Digit-Symbol Coding, Simple- and Choice Reaction Time, and Trail Making Test A/B were analyzed in Graphpad PRISM. 9.1.0 by multiple paired t-tests with Holm-Šídák corrections. Results are reported as differences-of-means pre- to post-treatment (SE) with Cohen's d effect sizes [ES] (0.2, 0.5, 0.8 represents small, medium, and large effect sizes, respectively). p-values <0.05 were considered significant.ResultsGraded Symptom Checklist score (p < 0.001): −25.1 (4.0) [1.83]; Digit-Symbol Matching speed (#symbols) (p = 0.03): 6.2 (1.9) [0.92]; Simple reaction time (ms) (p = 0.03): −74.7 (22.9) [0.94]; Choice reaction time (ms) (p = 0.009): −106.1 (26.0) [1.18]; Trails A (s) (p = 0.04) [0.80]: −2.6 (0.9); and Trails B (s) (p = 0.04): −6.0 (2.2) [0.79].ConclusionsThe present case series shows that a functional neurology approach of multimodal short duration intensive therapies can produce clinically meaningful improvements with large and very large effect sizes, in both the concussion symptoms and neurocognitive performance, of 12 professional NHL players experiencing symptom stagnation.


Neurology ◽  
2021 ◽  
Vol 98 (1 Supplement 1) ◽  
pp. S25.2-S25
Author(s):  
Shaun Kornfeld ◽  
Emily Kalambaheti ◽  
Matthew Michael Antonucci

ObjectiveDemonstrate neurocognitive improvements in an inactive, amateur football athlete following a functional neurology approach to multimodal neurorehabilitation.BackgroundAmerican Football has been reported to have one of the highest incidences of concussion in all contact sports. Given the high rate of concussive blows during play, the investigation of treatment modalities is warranted. This case study presents a 23-year-old male amateur football player who has sustained 3 diagnosed concussions with additional suspected concussions throughout his time participating in football. In addition, his symptoms persisted years after ceasing participation in all contact sports.Design/MethodsThe athlete was prescribed 10 treatment sessions over 5 consecutive days at an outpatient neurorehabilitation center specializing in functional neurology. The C3Logix neurocognitive assessment and Graded Symptom Checklist were utilized on intake and discharge. Multimodal treatment interventions included transcranial photobiomodulation, non-invasive neuromodulation of the lingual branch of the trigeminal nerve, neuromuscular reeducation of the limbs bilaterally, hand-eye coordination training, vestibular rehabilitation utilizing a three-axis whole-body off-axis rotational device, and cognitive training.ResultsOn intake, composite symptom score was reported as 10/162, Trails Making Test Part A was 20.8 seconds, Part B was 41.9 seconds, Digit Symbol Matching score was 53, Simple Reaction Time was 277 milliseconds, and Choice Reaction Time was 412 milliseconds. On discharge, the patient experienced a 70% in self-reported symptoms, Trails A improved to 14.8 seconds (+29%), Trails B improved to 30.3 seconds (+28%), Simple Reaction Time was 248 milliseconds (10% faster), and Choice Reaction Time was 340 milliseconds (17% faster).ConclusionsThe present case study demonstrates a meaningful improvement in symptoms and neurocognitive performance of a patient with multiple sports-related concussions. Therefore, the Press suggest further investigation into a functional neurology approach to multi-modal, intensive care to improve neurocognitive impairment in athletes that sustained concussions participating in footballs.


Author(s):  
Marc Dalecki ◽  
Fabian Steinberg ◽  
Rainer Beurskens

Objective Investigating dual-task (DT) performance during simulated weightlessness by water submersion, using a manual tracking and a choice reaction task. In contrast to previous work, we focus on performance changes over time. Background Previous research showed motor tracking and choice reaction impairments under DT and single-task (ST) conditions in shallow water submersion. Recent research analyzed performance as average across task time, neglecting potential time-related changes or fluctuations of task-performance. Method An unstable tracking and a choice reaction task was performed for one minute under ST and DT conditions in 5 m water submersion and on dry land in 43 participants. Tracking and choice reaction time performance for both tasks were analyzed in blocks of 10 seconds. Results Tracking performance deteriorated underwater compared to dry land conditions during the second half while performing one minute in DT conditions. Choice reaction time increased underwater as well, but independent of task time and type. Conclusion Tracking error increased over time when performing unstable tracking and choice reaction together. Potentially, physiological and psychological alterations under shallow submersion further strain the human system during DT operations, exceeding available recourse capacities such that DT performance deteriorated over time. Application Humans operating in simulated weightlessness underwater should be aware of substantial performance declines that can occur within a short amount of time during DT situations that include continuous tracking.


Author(s):  
Vitthal Khode ◽  
Girish Babu ◽  
Arun Gadad ◽  
Satish Patil ◽  
Komal Ruikar ◽  
...  

Background: Depressive disorder (DD) is a state of multiple neuro-psychological deficits. cognitive testing has proven beneficial in guiding treatment of depression. Since these neuro-cognitive testings require great deal of time and skill, measuring Reaction time (RT) can prove an alternative method of measure of cognition. RT is a sensitive tool to measure attention and execution. In our study whole body choice reaction time (WBCRT) is divided in to 2 chronoscopic readings WBCRT-C1and WBCRT-C2. WBCRT-C1 measures time required for central processing in the central nervous system which includes cognition and WBCRT-C2 measures total RT includes central processing and peripheral processing. Objectives: Objective of the study was to measure and compare WBCRT-C1 in DD and controls, and to assess the correlation between WBCRT-C1 with MMSE and HAM-A score. Methods: Hospital based case-control study was conducted on total 68 young subjects, 34 subjects of DD aged between 18-45yrs their reaction times were compared with similar number of age and sex matched controls. Results: WBCRT-C1 was more delayed in patients of DD (807±245 ms) than in controls (579±99ms). A significant correlation was found between WBCRT-C1 and MMSE (r=-0.7371, p=0.0001), HAM-A scores (r=0.3395 p=0.0046). Conclusion: WBCRT-C1 could be a quantitative tool to assess cognitive dysfunction in DD.


2021 ◽  
Author(s):  
Adrian Dinculescu ◽  
Cosmin Dugan ◽  
Cristian Vizitiu ◽  
Ioanina Parlatescu

Public Health ◽  
2021 ◽  
Vol 199 ◽  
pp. 34-41
Author(s):  
T. Zou ◽  
S. Cao ◽  
W. Liu ◽  
L. Li ◽  
J. Jiang ◽  
...  

2021 ◽  
Vol 36 (6) ◽  
pp. 1226-1226
Author(s):  
Christina Nunez ◽  
Bailey McDonald ◽  
Samantha Spagna ◽  
Charles Golden

Abstract Objective Due to the COVID-19 pandemic, many services attempted to quickly transition to a remote format. A need to incorporate and evaluate a remote delivery of neuropsychological measures arose. TestMyBrain (TMB) from the Many Brains Project has been utilizing teleneuropsychology in research since 2017. Method Volunteer research participants (N = 176, Mage = 29, Medu = 15 years, 64.7% white, 54.2% female, 83.2% right-handed) were administered TMB Simple Reaction Time and Choice Reaction Time subtest as part of a larger battery via zoom. Participants were able to choose between completing these measures using a keyboard, mouse, or a touch screen. There were no significant differences among demographic variables across the different completion methods. Results An ANCOVA indicated there was not a significant difference in simple reaction time across the different response F(2,168) = 0.482, p = 0.618, ηp2 = 0.006. There was however a significant difference in choice reaction time across the different response methods F(2,168) = 11.486, p &lt; 0.001, ηp2 = 0.120. Conclusion Results suggest different response methods maybe suitable for simpler tasks, yet there lacks consistency in response methods for more complex tasks. This medium effect size may have occurred as a result of the lack of sensitivity for devices to detect taps on different portions of the screen as effectively as various keys on a keyboard. Administrators must be aware of the limitations response methods may introduce into results. Limitation to this analysis include limited samples and not controlling for other factors that may potentially influence reaction time such as internet connection. Future research should focus on creating a standardized method for teleneuropsychology administration.


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