scholarly journals If You Are Old, Videos Look Slow. The Paradoxical Effect of Age-Related Motor Decline on the Kinematic Interpretation of Visual Scenes

2022 ◽  
Vol 15 ◽  
Author(s):  
Claudio de’Sperati ◽  
Marco Granato ◽  
Michela Moretti

Perception and action are tightly coupled. However, there is still little recognition of how individual motor constraints impact perception in everyday life. Here we asked whether and how the motor slowing that accompanies aging influences the sense of visual speed. Ninety-four participants aged between 18 and 90 judged the natural speed of video clips reproducing real human or physical motion (SoS, Sense-of-Speed adjustment task). They also performed a finger tapping task and a visual search task, which estimated their motor speed and visuospatial attention speed, respectively. Remarkably, aged people judged videos to be too slow (speed underestimation), as compared to younger people: the Point of Subjective Equality (PSE), which estimated the speed bias in the SoS task, was +4% in young adults (<40), +12% in old adults (40–70) and +16% in elders. On average, PSE increased with age at a rate of 0.2% per year, with perceptual precision, adjustment rate, and completion time progressively worsening. Crucially, low motor speed, but not low attentional speed, turned out to be the key predictor of video speed underestimation. These findings suggest the existence of a counterintuitive compensatory coupling between action and perception in judging dynamic scenes, an effect that becomes particularly germane during aging.

2019 ◽  
Author(s):  
John Michael Franchak ◽  
Kellan Kadooka

Visual attention in complex, dynamic scenes is attracted to locations that contain socially-relevant features, such as faces, and to areas that are visually salient. Previous work suggests that there is a global shift over development such that observers increasingly attend to faces with age. However, no prior work has tested whether this shift is truly global, that is, consistent across and within stimuli despite variations in content. To test the global shift hypothesis, we recorded eye movements of 89 children (6 months to 10 years) and adults while they viewed seven video clips. We measured the extent to which each participant attended to faces and to salient areas for each video. There was no evidence of global age-related changes in attention: Neither feature showed consistent increases or decreases with age. Moreover, windowed analyses within each stimulus video revealed moment-to-moment variations in the relation between age and each visual feature. For some time windows, adults looked more often at both feature types compared to infants and children. However, for other time windows the pattern was reversed—younger participants looked more at faces and salient locations. Lack of consistent directional effects provides strong evidence against the global shift hypothesis. We suggest an alternative explanation: Over development, observers increasingly prioritize when and where to look by learning to track which features are relevant within a scene. Implications for the development of visual attention and children’s understanding of screen-based media are discussed.


2021 ◽  
Vol 8 ◽  
Author(s):  
Lidia Cobos-Palacios ◽  
Jaime Sanz-Cánovas ◽  
Mónica Muñoz-Ubeda ◽  
María Dolores Lopez-Carmona ◽  
Luis Miguel Perez-Belmonte ◽  
...  

Atherosclerotic cardiovascular diseases (ASCVD) are the leading cause of death worldwide. High levels of total cholesterol—and of low-density lipoprotein cholesterol in particular—are one of the main risk factors associated with ASCVD. Statins are first-line treatment for hypercholesterolemia and have been proven to reduce major vascular events in adults with and without underlying ASCVD. Findings in the literature show that statins reduce coronary and cerebrovascular morbidity and mortality in middle-aged people, but their benefits in older adults are not as well-established, especially in primary prevention. Furthermore, many particularities must be considered regarding their use in old subjects, such as age-related changes in pharmacokinetics and pharmacodynamics, comorbidities, polypharmacy, and frailty, which decrease the safety and efficacy of statins in this population. Myopathy and a possible higher risk of falling along with cognitive decline are classic concerns for physicians when considering statin use in the very old. Additionally, some studies suggest that the relative risk for coronary events and cardiovascular mortality associated with high levels of cholesterol decreases after age 70, making the role of statins unclear. On the other hand, ASCVD are one of the most important causes of disability in old subjects, so cardiovascular prevention is of particular interest in this population in order to preserve functional status. This review aims to gather the current available evidence on the efficacy and safety of statin use in very old patients in both primary and secondary prevention.


2020 ◽  
Author(s):  
Ryan C Moore ◽  
Angela Y Lee ◽  
Jeffrey T Hancock ◽  
Meghan C Halley ◽  
Eleni Linos

BACKGROUND As COVID-19 poses different levels of threat to people of different ages, health communication regarding prevention measures such as social distancing and isolation may be strengthened by understanding the unique experiences of various age groups. OBJECTIVE The aim of this study was to examine how people of different ages (1) experienced the impact of the COVID-19 pandemic and (2) their respective rates and reasons for compliance or noncompliance with social distancing and isolation health guidance. METHODS We fielded a survey on social media early in the pandemic to examine the emotional impact of COVID-19 and individuals’ rates and reasons for noncompliance with public health guidance, using computational and content analytic methods of linguistic analysis. RESULTS A total of 17,287 participants were surveyed. The majority (n=13,183, 76.3%) were from the United States. Younger (18-31 years), middle-aged (32-44 years and 45-64 years), and older (≥65 years) individuals significantly varied in how they described the impact of COVID-19 on their lives, including their emotional experience, self-focused attention, and topical concerns. Younger individuals were more emotionally negative and self-focused, while middle-aged people were other-focused and concerned with family. The oldest and most at-risk group was most concerned with health-related terms but were lower in anxiety (use of fewer anxiety-related terms) and higher in the use of emotionally positive terms than the other less at-risk age groups. While all groups discussed topics such as acquiring essential supplies, they differentially experienced the impact of school closures and limited social interactions. We also found relatively high rates of noncompliance with COVID-19 prevention measures, such as social distancing and self-isolation, with younger people being more likely to be noncompliant than older people (<i>P</i>&lt;.001). Among the 43.1% (n=7456) of respondents who did not fully comply with health orders, people differed substantially in the reasons they gave for noncompliance. The most common reason for noncompliance was not being able to afford to miss work (n=4273, 57.3%). While work obligations proved challenging for participants across ages, younger people struggled more to find adequate space to self-isolate and manage their mental and physical health; middle-aged people had more concerns regarding childcare; and older people perceived themselves as being able to take sufficient precautions. CONCLUSIONS Analysis of natural language can provide insight into rapidly developing public health challenges like the COVID-19 pandemic, uncovering individual differences in emotional experiences and health-related behaviors. In this case, our analyses revealed significant differences between different age groups in feelings about and responses to public health orders aimed to mitigate the spread of COVID-19. To improve public compliance with health orders as the pandemic continues, health communication strategies could be made more effective by being tailored to these age-related differences.


Author(s):  
Антонина Владимировна Алексеева ◽  
Анатолий Яковлевич Рыжов ◽  
Данила Игоревич Игнатьев

Исследованы антропометрические показатели и параметры состава тела у лиц среднего возраста. Установлено, что некоторые калиперометрические показатели испытывают различие у мужчин и женщин. Калиперометрические показатели величины кожных покровов спины, медиальной и латеральной поверхностей бедер характеризуются тесными положительными корреляциями. Anthropometric indicators and parameters of body composition in middle-aged people were studied. It is established that some caliperometric indicators experience a difference in men and women. Caliperometric indicators of the size of the skin of the back, medial and lateral surfaces of the thighs are characterized by close positive correlations.


2015 ◽  
Vol 37 (4) ◽  
pp. 1513-1526 ◽  
Author(s):  
Lianjun Pan ◽  
Jiehua Ma ◽  
Feng Pan ◽  
Dan Zhao ◽  
Jianping Gao

Background/Aims: Erectile dysfunction (ED) in aged people remains a topic of interest to andrological physicians. Long non-coding RNAs (lncRNAs), which form the largest group of non-coding RNAs, have been shown to regulate various biological processes. The function of lncRNAs in age-related erectile dysfunction (A-ED) pathogenesis remains poorly understood. Methods: This study aims to assess the differential expression profiles of mRNAs and lncRNAs between A-ED and normal control (NC) samples. Using a second-generation lncRNA microarray, we detected a total of 8,744 lncRNAs and 13,585 coding transcripts. Results: We identified 608 up-regulated and 406 down-regulated lncRNAs in A-ED compared with NC samples, by setting a filter of fold-change >2.0. Gene Ontology and pathway analysis revealed that a muscle contraction disorder induced by abnormal ion channels might play a critical role in the pathogenesis of A-ED. Conclusion: Our results show significantly altered expression profiles of lncRNAs and mRNAs between A-ED and NC. This study may provide information for further research on A-ED and may be helpful for finding a new therapeutic target for A-ED.


2021 ◽  
Vol 8 (5) ◽  
pp. 59-66
Author(s):  
Petru Livinti ◽  

This paper was presented a comparative study on the methods of adjusting the speed of a three-phase asynchronous motor with a rotor in a short circuit. For the same structure of the experimental stand used, two programs were created, implemented, and validated in LabVIEW. For the first method, the program in LabVIEW was made with the PI (proportional-integrative) controller and for the second method, the program in LabVIEW was made with the Fuzzy Logic controller. Following the analysis of the resulting graphs, it was found that the speed control system made with the fuzzy logic controller ensures an increase in its performance compared to the speed control system made with the conventional PI type controller. The indicial responses of the adjustment system of the three-phase asynchronous motor speed with PI controller or Fuzzy Logic controller have been determined in real-time by means of the experimental stand. The override of the speed adjustment system is decreased from the value of 26.9% corresponding to the PI controller to the value of 2.3% corresponding to the Fuzzy Logic controller and the duration of the transient time is decreased from the value of 2.2 s related to the PI controller to the value of 0.5 s, related to the Fuzzy Logic controller. By using the Fuzzy Logic controller, the amount of electrical energy required to supply the electric drive system made with a three-phase asynchronous motor will be reduced. This three-phase asynchronous motor speed adjustment algorithm can be implemented for other electric drive systems from different industrial applications.


Author(s):  
S.V. Paramonova ◽  
◽  
N.N. Malyutina ◽  
N.S. Sedinina

Abstract: We examined 109 men working at а mining enterprise exposed to occupational and psychosocial factors. The patients were divided into two groups: the main group - 60 men working in underground conditions, the conditions are assigned to classes 3.3 - 3.4; comparison group - 49 men performing ground work, whose conditions are classified as 3.2. In connection with the established diagnosis of "Syndrome of arterial hypertension" in middle-aged people of the main group, it was divided into two subgroups in terms of age - people under 45 years old (n = 20, age 38.45 ± 2.95 years), and people older 45 years old (n = 40, age 50.90 ± 1.46 years.). Purpose: to study the prerequisites for the development of hypertension based on the psychovegetative status and some changes in the biochemical and functional indicators of the CVS, depending on the age-related changes in these indicators. Materials and methods: the patient underwent a study of the psycho-vegetative state with an assessment of the level of neuropsychic stress, personal and situational anxiety, attention function, subjective reflection of psycho-vegetative distress. The state of the cardiovascular system was investigated according to the results of functional and clinical laboratory diagnostics. Results: A decrease in attention, an increase in personal anxiety and an increase in the number of psychovegetative complaints were significantly more often detected in the group of patients with hypertension (OR 7.50; 95% CI 2.39-23.58; OR 11.06 95% - CI - 4.35 - 28.10; CI 22.50; 95% CI - 7.09 - 71.41). Adaptive psychovegetative phenotypes were distinguished in two subgroups. In patients over 45 years old, a negative relationship was established between age, experience and some parameters of psycho-vegetative status, as well as a direct relationship between these parameters and some indicators of homeostasis in the diagnosis of hypertension syndrome in 95% of patients in this subgroup. Conclusions: with an increase in age and experience, there is a transformation of the adaptive psychovegetative phenotype with an inversion of connections with psychovegetative parameters against the background of increased functional disorders of the cardiovascular system. Diagnostics of the transformation of this phenotype makes it possible to assess the risk of developing arterial hypertension and contributes to the prevention of hypertension by forming risk groups.


2021 ◽  
Vol 17 (4) ◽  
pp. 514-523
Author(s):  
Mikhail Krishtal

The COVID-19 pandemic has become a key problem for Russian society and government officials in 2020. In this regard, there is an urgency to study the assessments and peculiarities of the perception by the population of anti-covid measures of the authorities, which were initially associated with risks of a social, economic, and political nature. The purpose of this study is to identify age-related features of the perception of anti-epidemic measures of the authorities, using the example of residents of the Kaliningrad region. From August to November 2020, six focus group interviews were conducted with representatives of three age groups. The data obtained were processed in the ATLAS.ti qualitative analysis program. As a result, it was revealed that the main age differences are manifested when assessing the introduction of remote forms of social interaction in the conditions of coronavirus. The older generation's negative attitude to innovation is due to concern for their grandchildren and children receiving the necessary educational and communication skills and competencies in this format, as well as due to fears of being deceived by fraudsters. At the same time, young people and middle-aged people note the positive possibilities of distance learning due to the simplification of the implementation of a number of social actions. Age differences were also revealed regarding the perception of information about the pandemic situation provided by government representatives. The youth believes that the distortion of this information may be based on the political motives of the authorities. Representatives of the older age group believe that the reason for the correction of information by the authorities is the desire to obtain financial benefits at the expense of the population. People in the age group of 31-49 years see this distortion mainly as a good motive for preventing panic among the population. Estimates of the introduction of self-isolation and the attitude to mass vaccination against COVID-19 were similar among representatives of different generations. Often supporting the regime of self-isolation, respondents noted the obligation of the authorities to ensure the financial security of people. Regarding the use of the vaccine, skepticism was found among all age groups due to fears about its unreliability


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