Changes in physiological function occurring during a body water deficit may result in significant decrements in performance, cognitive function and fine motor control during exercise. This may be due to the magnitude of the body water deficit. Rehydration strategies are important to prevent these deleterious effects in performance. The purpose of this study was to examine the changes before and after prolonged exercise of an alanine-glutamine dipeptide (AG) on cognitive function and reaction time. Twelve male endurance-trained runners (age: 23.5 [plus or minus] 3.7 y; height: 175.5 [plus or minus] 5.4 cm; weight: 70.7 [plus or minus] 7.6 kg) participated in this study. Participants were asked to run on a treadmill at 70% of their predetermined VO2max for 1 h and then run at 90% of VO2max until volitional exhaustion on four separate days (T1-T4). T1 was a dehydration trial and T2-T4 were all different hydration modalities (electrolyte drink, electrolyte drink with a low dose of AG, electrolyte drink with a high dose of AG, respectively) where the participants drank 250 mL every 15 min. Before and after each hour run, cognitive function and reaction tests were administered. Hopkins Magnitude Based Inferences were used to analyze cognitive function and reaction time data. Results showed that physical reaction time was likely faster for the low dose trial than the high dose trial. Dehydration had a possible negative effect on the number of hits in 60-sec compared to both the low and high dose trials. Comparisons between only the electrolyte drink and the high dose ingestion appeared to be possibly negative. Analysis of lower body quickness indicates that performance in both the low and high dose trials were likely improved (decreased) in comparison to the dehydration trial. Multiple object tracking analysis indicated a possible greater performance for dehydration and low dose compared to only the electrolyte drink, while there was a likely greater performance in multiple object tracking for the high dose trial compared to consumption of the electrolyte drink only. The serial subtraction test was possibly greater in the electrolyte drink trial compared to dehydration. Rehydration with the alanine-glutamine dipeptide during an hour run at a submaximal intensity appears to maintain or enhance subsequent visual reaction time in both upper and lower body activities compared to a no hydration trial. The combination of the alanine-glutamine dipeptide may have enhanced fluid and electrolyte absorption from the gut and possibly into skeletal tissue to maintain neuromuscular performance.

While it has been established that postural control is affected by executive function, research is lacking in identifying if specific executive function components are most responsible or if certain aspects of postural control are more affected than others (e.g., proprioception, vestibular, visual). The current study examined the role of inhibition, processing speed, and visuospatial ability in postural control under conditions affecting visual, proprioceptive, and vestibular sensory input. Cognitive assessments consisted of the Flanker Inhibitory Control and Attention Test, Digit Symbol Substitution Test, Clock Drawing Test, Trail Making Test – Part B, and simple reaction time. Standing Balance was used to assess postural sway. Analyses revealed that average balance was significantly associated with simple reaction time (r(88) = -0.31, p < .01) and the clock drawing test (r(88) = -0.25, p< .05). Further analyses revealed a significantly stronger relationship between pose #1 (eyes opened, firm) and average balance (r(88) = -0.845, p< 0.1) when compared to pose #2 (eyes closed, firm), and pose #3 (eyes opened, foam) and average balance r(88) = -0.8015, p< 0.1) when compared to pose #4 (eyes closed, foam). The significantly stronger relationship between these two measures demonstrates that visual input in both conditions #1 and #3 was associated with better postural control. The findings of this study demonstrate that reaction time and visuospatial abilities are associated with overall postural control in healthy older adults. Results suggest that reaction time should be more thoroughly researched to determine the extent of its influence on EF and physical function.

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Abstract  Master thesis in Business Administration, School of Business and Economics Linnaeus University 4FE17E VT2022  Authors: Eric Månsson &amp; Marcus Nykvist  Supervisor: Magnus Willesson  Examiner: Christopher von Koch  Title: Identifying Reflexivity  Keywords: Reflexivity, EMH, AMH, fundamental value, market value, feedback loop, cognitive function, manipulative function.  Background: Current economic theory describes the risks the financial markets face as exogenous in nature. Several studies suggest the presence of an unaccounted-for risk which is not exogenous in nature but endogenous. Seemingly, the initial risk is exogenous but through the interaction between the market and its participants this risk can be either amplified or dulled. As such, current economic theory illustrates only partially the risks of financial markets as they do not account for endogenous risk. A theory is necessary which not only acknowledges the influence of exogenous risk but also considers the impact of endogenous risk after the fact. The theory of reflexivity offers a solution to this problem as it considers the interactions between the market and its participants and how these two affect each other, through the so-called cognitive- and manipulative function.  Purpose: As reflexivity entails a more complete description of the behavior of financial markets than current economic theory, the purpose of this study is to identify its occurrence.  Method: This study uses a deductive research approach along with a quantitative strategy to test its purpose. The utilized model is constructed through the theory of reflexivity and the implications this theory poses toward statistical testing. The study conducts its testing on a random sample of firms from the S&amp;P 500 between 1992-2021 using annual data.  Results: The results of the study are invalidated due to the use of weak instruments in the market model, and due to a lack of endogeneity in the fundamental model. As such, the occurrence of reflexivity cannot be confirmed through this study. An interesting ancillary finding however is a methodological implication which suggests that different proxies for fundamental value as well as different instrumental variables may be necessary given a certain context to identify endogeneity and instrumental relevance respectively. / Sammanfattning  Examensarbete, Ekonomihögskolan vid Linnéuniversitetet, Företagsekonomi 4FE17E VT2022  Författare: Eric Månsson &amp; Marcus Nykvist  Handledare: Magnus Willesson  Examinator: Christopher von Koch  Titel: Identifying Reflexivity  Sökord: Reflexivity, EMH, AMH, fundamental value, market value, feedback loop, cognitive function, manipulative function.  Bakgrund: Nuvarande ekonomiska teorier behandlar de risker som finns på de finansiella marknader som exogena. Hursomhelst, flertalet studier indikerar att det även finns risker som inte har tagits i beaktning och som eventuellt kan anses vara endogena. Det verkar därmed som att den ursprungliga risken är endogen, men genom samspelet mellan marknad och dess deltagare kan denna stärkas eller dämpas. Till följd av detta verkar det som att de nuvarande ekonomiska teorierna bara tar hänsyn till en del av alla de risker som existerar på de finansiella marknaderna. Med andra ord, det behövs en teori som inte bara tar hänsyn till de exogena riskerna, men som också uppmärksammar de endogena riskerna. Reflexivity erbjuder en sådan lösning i och med dess hänseende till interaktionen mellan marknad och marknadsdeltagare och dessas påverkan på varandra genom de så kallade kognitiva och manipulativa funktioner.  Syfte: Syftet med detta arbete är att identifiera reflexivity på marknaderna, eftersom att denna teori erbjuder en mer heltäckande beskrivning av marknadsbeteendet.  Metod: Tillvägagångssättet i denna studie är i form av en deduktiv forskning med en kvantitativ strategi för att testa syftet. Modellen som används är uppbyggd genom reflexivity-teorin och dess innebörd som denna teori har för statistisk testning. Testningen utgår från ett slumpmässigt urval av företag från S&amp;P 500 mellan 1992 och 2021 på en årlig basis.  Resultat: Resultaten från denna studie ogiltigförklarades på grund av svaga instrumentala variabler i testningen och till följd av bristande endogenitet i den fundamentala modellen. Det gick därmed inte att bekräfta förekomsten av reflexivity genom denna studie.

Yoga has been increasingly utilized as a potential intervention to improve cognitive functioning in patients with neuropsychiatric disorders. However, evidence-based review is limited. Further, whether the observed yoga-related changes in cognitive function are systematically related to specific neuropsychological domains or specific neuropsychiatric disorders remains underexplored. Thus, the aim of this review is to systematically evaluate randomized controlled trials that objectively measure global cognitive function and/or other neuropsychological domains (e.g., attention, executive functioning, social cognition, etc.) in neuropsychiatric populations. Four broad clusters of neuropsychiatric disorder are discussed: focal neurobehavioral syndromes; major neuropsychiatric disorders; neurological conditions with cognitive, emotional, and behavioral features; and comorbid neuropsychiatric and neurological conditions. / Kinesiology