scholarly journals Impaired Attentional Processing During Parabolic Flight

2021 ◽  
Vol 12 ◽  
Author(s):  
Anika Friedl-Werner ◽  
Marie-Laure Machado ◽  
Costantino Balestra ◽  
Yannick Liegard ◽  
Bruno Philoxene ◽  
...  

Previous studies suggest that altered gravity levels during parabolic flight maneuvers affect spatial updating. Little is known about the impact of the experimental setting and psychological stressors associated with parabolic flight experiments on attentional processes. To address this gap, we investigated the level of alertness, selective and sustained attention in 1 and 0 g using a Go/No-Go Continuous Performance Task. We also identified several parameters associated with the experimental set-up of a parabolic flight that could be expected to affect attentional processing. These included the use of scopolamine, sleep quality prior to the flight day, participant’s stress level as well as mood and anxiety state before and after the parabolic flight. We observed a deterioration in attentional processing prior to the first parabola that was further aggravated in weightlessness and returned to baseline after the last parabola. Reaction Time, Hit and False Alarm Rate were moderately correlated with self-reported anxiety state, but not cortisol levels or emotional states. The use of scopolamine had minor effects on Reaction Time. Our results confirm previous studies reporting impairments of cognitive performance in 0 g, and highlight important aspects that should be considered for the design of behavioral research experiments in future parabolic flight campaigns.

2009 ◽  
Vol 23 (1) ◽  
pp. 59-76 ◽  
Author(s):  
Daniel T. Bishop ◽  
Costas I. Karageorghis ◽  
Noel P. Kinrade

The main objective of the current study was to examine the impact of musically induced emotions on athletes’ subsequent choice reaction time (CRT) performance. A random sample of 54 tennis players listened to researcher-selected music whose tempo and intensity were modified to yield six different music excerpts (three tempi × two intensities) before completing a CRT task. Affective responses, heart rate (HR), and RTs for each condition were contrasted with white noise and silence conditions. As predicted, faster music tempi elicited more pleasant and aroused emotional states; and higher music intensity yielded both higher arousal (p < .001) and faster subsequent CRT performance (p < .001). White noise was judged significantly less pleasant than all experimental conditions (p < .001); and silence was significantly less arousing than all but one experimental condition (p < .001). The implications for athletes’ use of music as part of a preevent routine when preparing for reactive tasks are discussed.


2020 ◽  
Vol 11 (02) ◽  
pp. 250-255
Author(s):  
Vasantmeghna S. Murthy ◽  
Vedant S. Shukla

Abstract Background Executive functions (EFs) are critical to daily life and sensitive to our physiological functioning and emotional states. The number of people living with chronic kidney disease (CKD) on hemodialysis (HD) globally is increasing steadily. We aimed to determine the impact of a single session of HD on EFs in patients with CKD receiving maintenance HD (MHD). Methods This was a quasi-experimental study conducted at the department of psychiatry and dialysis unit of a tertiary hospital. Patients undergoing MHD underwent screening to rule out delirium, using the Confusion Assessment Method prior to EF testing. The tests of EF used were the Trail-Making Test—Part B (TMT-B) and Frontal Assessment Battery (FAB), both of which were administered before and after a session of HD. Statistical tests used were Wilcoxon matched pairs signed ranks test, paired t-test, single sample t-test, and correlation analyses. Results The mean time taken on TMT-B before HD was 195.36 seconds and after HD, 171.1 seconds; difference is significant (p = 0.0001). The mean FAB score was 13.19 before HD and 14.83 after HD; the difference is significant (p < 0.0001). Significant differences were observed on similarities (p = 0.003), lexical fluency (p = 0.02), and go–no go (p = 0.003) subtests of FAB. Mean TMT-B scores before and after HD differed significantly from that of a reference study (reference TMT-B 150.69 seconds), p = 0.0002 and 0.04, respectively. Conclusion We conclude that patients with CKD on MHD, in general, have worse executive cognitive functioning compared with healthy populations. A session of HD results in significant improvement in these functions.


2019 ◽  
Vol 104 (7) ◽  
pp. e2.52-e2
Author(s):  
Suzannah Hibberd ◽  
Alok Sharma ◽  
Marhamat Chavoshzadeh

BackgroundIn January 2018, neonatal intubation premedication kits containing atropine, suxamethonium and fentanyl were introduced alongside the implementation of dose- banding for these medicines according to patient’s weight and regardless of the patient’s gestation. A prescribing bundle on the electronic prescribing system was also created to automatically populate the doses based on the patient’s weight. Seven kits are produced each week by the Pharmacy Technical Services Unit.AimTo assess the staff perceived impact of pre-prepared intubation drug kits with associated dose-banding of the medication.MethodsThree months after the kits were implemented, a survey was sent to all nursing and medical staff to establish their thoughts on the intubation process before and after the introduction of pre-made intubation drug kits.Results78 staff responded, 45.5% were doctors and 54.5% were nursing staff. The response rate was 53.8%. 78% of respondents reported being part of a difficult intubation over the last 5 years. The main problems identified, prior to the implementation of the neonatal intubation drug kits, included the intubation process (51.5%), preparation and communication prior to intubation, (13.6%), time drawing up intubation drugs (10.6%) and the patient having a difficult airway (9%). 87.2% found the premade intubation kits very useful, none of the respondents thought the kits were not useful. Four themes were found irrespective of whether the respondent was a doctor or member of nursing staff. The themes were: they made the process easier; quicker; reduced risk of error and helped provide better patient care. When asked if any complications had arisen, 4% reported that they had run out of kits and 2.7% said there was confusion when signing the kits out of the controlled drug (CD) register.Three weeks out of 25 saw all the kits being used, average usage is 4 intubation kits per week. 97.4% reported the doses used were effective in sedating and paralysing the baby prior to intubation, 2.6% commented that they were somewhat effective but that in one occasion the paralysis had not been optimal, however they questioned whether the cannula had been functioning properly.ConclusionThe implementation of ready to use intubation drug kits has made the process of preparing for an intubation easier and quicker for all involved in the process. Having the dose banding set up on the electronic prescribing system has reduced the chance of prescribing errors and the pre- filled kits have reduced the chances of calculation errors during drug preparation. When the kits run out there are instructions in the guideline detailing how to make the required concentrations. As a result of this study standardised teaching videos were introduced from the beginning of July 18. Further simulations have been completed to ensure that all staff follow a standardised process. Next steps are to ensure that the documentation in the CD register includes all necessary information without any need for amendments. To overcome this, a stamp is being designed to use in the book each time a patient requires a kit, thereby providing a prompt for the nurses.


2021 ◽  
Author(s):  
Gautam Kumar Baboo ◽  
Veeky Baths

Substantial adolescence is spent in an academic environment where the student can experience varying intensities of depression, stress, and anxiety, which can be fatal. To address this concern, we utilized the Depression Anxiety and Stress Survey (DASS) 21 and Modified Sternberg working memory, thereby assessing the emotional states and assessing the impact on the cognitive ability of students (n=37, F=7) in terms of working memory. An intervention was provided (Art of Living YES+ program) for ten days. The assessment is carried out in the time window of two months before and after the intervention. F-test and T-test(p≤0.05) on the scores and reaction time are performed for hypothesis testing. This statistical analysis reveals that both the depression category and stress category reject the null hypothesis. Among the thirty-seven, only five students took part in the post-intervention assessment, the scores in 28% of the questions had lower scores, and 19 % did not have any change; however, there was an increase in the scores in 42% of the questions. No significant changes are observed in the working memory ability of the students. Based on reaction time analysis: 11.62%, 16.27%, and 25.58% are outliers for each type of question, respectively. Two participants showed significantly lower reaction times, indicating a faster reading ability than the rest. This study shows that the intervention can positively impact emotional states-depression, stress, and affect working memory abilities.


2020 ◽  
pp. 108705471989781
Author(s):  
Orrie Dan ◽  
Ami Cohen ◽  
Kfir Asraf ◽  
Ivgeny Saveliev ◽  
Iris Haimov

Objective: To identify the impact of sleep deprivation on functioning of young adults with or without ADHD on a continuous performance attention task. Method: Thirty-four men ( M age = 25.38) with ( n = 16) or without ( n = 18) ADHD completed a continuous performance task before and after 25 hr of sustained wakefulness in a controlled environment. Results: In both groups, sleep deprivation caused a decline in performance on all variables: omission errors, commission errors, reaction time, and reaction time variability. In addition, the ADHD group made more omission and commission errors, and had greater reaction time variability. Conclusion: Sleep deprivation has a detrimental effect on attention functioning among young adults. In addition, although young adults with ADHD generally perform worse on continuous performance tasks than young adults without ADHD, the groups are similarly affected by sleep deprivation.


1973 ◽  
Vol 3 (1) ◽  
pp. 55-61 ◽  
Author(s):  
W. L. F. Brinkmann ◽  
J. C. do Nascimento

SUMMARY The slash and burn method was studied with respect to changes on the chemical composition in the top-soil layer (upper 20 cm) of yellow latosols (about 85% of the total area) and hydromorphic soils (about 1% of the total area) before and after fire was set on the cleared forest. The obtained analytical data prove the following result : 1) the soil fertility of latosols and hydromorphic soils is considerably low as far as natural conditions are concerned, 2) after burning a considerable amount of plant nutrients normally bound to the standing crop is lost in the form of volatiles and particles during the burning procedures, 3) a great amount of plant nutrients is rapidly released to the soil after burning, 4) great quantities of temporarily available nutrients are lost by leaching as the nutrient uptake capacity of the crops is not able to match the excess of available plant nutrients, 5) strong nutrient fixation will reduce the availability of present plant nutrients remarkably, 6) the nutrient return from standing crop bound nutrients by means of fire is not able to guarentee long-term tropical agriculture, 7) correction of soil pH by means of heavy liming and the application of fertilizers is a basic need in tropical landuse systems, 8) the treatment with herbicides, insecticides and fungicides is indispensable to reduce root competion and plant deseases and 9) favourable conditions as far as the impact of atmospheric agents on the crops is concerned has to be set up by means of crop specific shelter-wood systems.


Author(s):  
T. Gulik-Krzywicki ◽  
M.J. Costello

Freeze-etching electron microscopy is currently one of the best methods for studying molecular organization of biological materials. Its application, however, is still limited by our imprecise knowledge about the perturbations of the original organization which may occur during quenching and fracturing of the samples and during the replication of fractured surfaces. Although it is well known that the preservation of the molecular organization of biological materials is critically dependent on the rate of freezing of the samples, little information is presently available concerning the nature and the extent of freezing-rate dependent perturbations of the original organizations. In order to obtain this information, we have developed a method based on the comparison of x-ray diffraction patterns of samples before and after freezing, prior to fracturing and replication.Our experimental set-up is shown in Fig. 1. The sample to be quenched is placed on its holder which is then mounted on a small metal holder (O) fixed on a glass capillary (p), whose position is controlled by a micromanipulator.


2017 ◽  
Vol 76 (2) ◽  
pp. 71-79 ◽  
Author(s):  
Hélène Maire ◽  
Renaud Brochard ◽  
Jean-Luc Kop ◽  
Vivien Dioux ◽  
Daniel Zagar

Abstract. This study measured the effect of emotional states on lexical decision task performance and investigated which underlying components (physiological, attentional orienting, executive, lexical, and/or strategic) are affected. We did this by assessing participants’ performance on a lexical decision task, which they completed before and after an emotional state induction task. The sequence effect, usually produced when participants repeat a task, was significantly smaller in participants who had received one of the three emotion inductions (happiness, sadness, embarrassment) than in control group participants (neutral induction). Using the diffusion model ( Ratcliff, 1978 ) to resolve the data into meaningful parameters that correspond to specific psychological components, we found that emotion induction only modulated the parameter reflecting the physiological and/or attentional orienting components, whereas the executive, lexical, and strategic components were not altered. These results suggest that emotional states have an impact on the low-level mechanisms underlying mental chronometric tasks.


2015 ◽  
Vol 29 (4) ◽  
pp. 135-146 ◽  
Author(s):  
Miroslaw Wyczesany ◽  
Szczepan J. Grzybowski ◽  
Jan Kaiser

Abstract. In the study, the neural basis of emotional reactivity was investigated. Reactivity was operationalized as the impact of emotional pictures on the self-reported ongoing affective state. It was used to divide the subjects into high- and low-responders groups. Independent sources of brain activity were identified, localized with the DIPFIT method, and clustered across subjects to analyse the visual evoked potentials to affective pictures. Four of the identified clusters revealed effects of reactivity. The earliest two started about 120 ms from the stimulus onset and were located in the occipital lobe and the right temporoparietal junction. Another two with a latency of 200 ms were found in the orbitofrontal and the right dorsolateral cortices. Additionally, differences in pre-stimulus alpha level over the visual cortex were observed between the groups. The attentional modulation of perceptual processes is proposed as an early source of emotional reactivity, which forms an automatic mechanism of affective control. The role of top-down processes in affective appraisal and, finally, the experience of ongoing emotional states is also discussed.


2018 ◽  
Vol 15 (1) ◽  
pp. 55-72
Author(s):  
Herlin Hamimi ◽  
Abdul Ghafar Ismail ◽  
Muhammad Hasbi Zaenal

Zakat is one of the five pillars of Islam which has a function of faith, social and economic functions. Muslims who can pay zakat are required to give at least 2.5 per cent of their wealth. The problem of poverty prevalent in disadvantaged regions because of the difficulty of access to information and communication led to a gap that is so high in wealth and resources. The instrument of zakat provides a paradigm in the achievement of equitable wealth distribution and healthy circulation. Zakat potentially offers a better life and improves the quality of human being. There is a human quality improvement not only in economic terms but also in spiritual terms such as improving religiousity. This study aims to examine the role of zakat to alleviate humanitarian issues in disadvantaged regions such as Sijunjung, one of zakat beneficiaries and impoverished areas in Indonesia. The researcher attempted a Cibest method to capture the impact of zakat beneficiaries before and after becoming a member of Zakat Community Development (ZCD) Program in material and spiritual value. The overall analysis shows that zakat has a positive impact on disadvantaged regions development and enhance the quality of life of the community. There is an improvement in the average of mustahik household incomes after becoming a member of ZCD Program. Cibest model demonstrates that material, spiritual, and absolute poverty index decreased by 10, 5, and 6 per cent. Meanwhile, the welfare index is increased by 21 per cent. These findings have significant implications for developing the quality of life in disadvantaged regions in Sijunjung. Therefore, zakat is one of the instruments to change the status of disadvantaged areas to be equivalent to other areas.


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