Psychophysiology

2015 ◽  
Author(s):  
Syergyey Krivoyekov ◽  
Roman Ayzman
Keyword(s):  
Graduate Students ◽  
Nervous Activity ◽  
Neural Mechanisms ◽  
Nervous Regulation ◽  
Physiological Mechanisms ◽  
Fundamental Knowledge ◽  
Physiological Processes ◽  
Medical Faculties ◽  
Functional States ◽  
And Behavior

Psychophysiology — the science studying interrelation of mentality of the person and physiological processes. Fundamental knowledge of work of a brain, first of all, of nervous regulation of functions of an organism, the general and specific features of the highest falls within the scope of its interests nervous activity, the defining character and behavior of the person, psychophysiological mechanisms of regulation of functional states. In the book neurophysiological bases of coding and information processing in nervous system, neural mechanisms of feelings, perceptions, memories, training, motivations and emotions, thinking and the speech, attention, consciousness, behavior, mental activity are stated. Separate the section is devoted to physiological bases of mental changes at various functional, extreme and pathophysiological states (a stress, post-stressful frustration, addiktivny states, depressions, etc.) and to ways of their correction. Authors tried to pay special attention to disclosure of specifics of psychophysiology of the person, to difference of physiological mechanisms of regulation of mental functions of the person in comparison with model researches on animals. For simplification of work on discipline and the best digestion of material the textbook is supplied with the glossary. For students, undergraduates, graduate students and teachers of psychological and medical faculties of higher education institutions.

EXPERIMENTAL ASSESSMENT OF THE NANOPARTICLES TOXICITY OF NICKEL OXIDE IN TWO SIZES IN THE SUBCHRONIC EXPERIMENT

2018 ◽  
pp. 30-35
Author(s):  
M.P. Sutunkova ◽  
B.A. Katsnelson ◽  
L.I. Privalova ◽  
S.N. Solovjeva ◽  
V.B. Gurvich ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Nervous Activity ◽  
Equal Mass ◽  
The Body ◽  
Subchronic Toxicity ◽  
Physiological Mechanisms ◽  
Nickel Oxide Nanoparticles ◽  
The Relationship ◽  
The Brain ◽  
Nanoparticles Toxicity

We conducted a comparative assessment of the nickel oxide nanoparticles toxicity (NiO) of two sizes (11 and 25 nm) according to a number of indicators of the body state after repeated intraperitoneal injections of these particles suspensions. At equal mass doses, NiO nanoparticles have been found to cause various manifestations of systemic subchronic toxicity with a particularly pronounced effect on liver, kidney function, the body’s antioxidant system, lipid metabolism, white and red blood, redox metabolism, spleen damage, and some disorders of nervous activity allegedly related to the possibility of nickel penetration into the brain from the blood. The relationship between the diameter and toxicity of particles is ambiguous, which may be due to differences in toxicokinetics, which is controlled by both physiological mechanisms and direct penetration of nanoparticles through biological barriers and, finally, unequal solubility.

scholarly journals Food Losses and Food Waste Versus Circular Economy

2018 ◽  
Vol 18(33) (2) ◽  
pp. 228-237 ◽  
Author(s):  
Maria Parlińska ◽  
Abhishek Pagare
Keyword(s):  
Food Waste ◽  
Circular Economy ◽  
Negative Attitude ◽  
Economic Activities ◽  
Fundamental Knowledge ◽  
Political Contribution ◽  
Food Losses ◽  
Economic Nature ◽  
And Behavior

The article aims to introduce the issue of food waste and all attempts to prevent action. Business and politics are almost interdependent, and any discussion of an economic nature is not complete without a political contribution. The role of politics and politicians in shaping economic activities was and is widely discussed. In the article, there will be a discussion on the problems of food losses and waste in Poland as the member of EU and in India. The idea of the topic came during the tenure of collaboration between representatives of both departments. Conclusions of the study found some similarities and a lot of differences between the countries. Studies have shown that negative attitude of house-hold towards food waste is not frequently reflected in consumers’ behavior, despite their fundamental knowledge on how to reduce food waste. Properly selected and presented information will stimulate both consumer’s attitude and behavior.

scholarly journals Event-related functional MRI of awake behaving pigeons at 7T

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Mehdi Behroozi ◽  
Xavier Helluy ◽  
Felix Ströckens ◽  
Meng Gao ◽  
Roland Pusch ◽  
...  
Keyword(s):  
Functional Mri ◽  
Color Discrimination ◽  
Motion Artifacts ◽  
Stress Conditions ◽  
Neural Mechanisms ◽  
Single Shot ◽  
Visually Guided ◽  
Hemodynamic Response Function ◽  
Species Specific ◽  
And Behavior

Abstract Animal-fMRI is a powerful method to understand neural mechanisms of cognition, but it remains a major challenge to scan actively participating small animals under low-stress conditions. Here, we present an event-related functional MRI platform in awake pigeons using single-shot RARE fMRI to investigate the neural fundaments for visually-guided decision making. We established a head-fixated Go/NoGo paradigm, which the animals quickly learned under low-stress conditions. The animals were motivated by water reward and behavior was assessed by logging mandibulations during the fMRI experiment with close to zero motion artifacts over hundreds of repeats. To achieve optimal results, we characterized the species-specific hemodynamic response function. As a proof-of-principle, we run a color discrimination task and discovered differential neural networks for Go-, NoGo-, and response execution-phases. Our findings open the door to visualize the neural fundaments of perceptual and cognitive functions in birds—a vertebrate class of which some clades are cognitively on par with primates.

Resituating cognitive mechanisms within heterarchical networks controlling physiology and behavior

2019 ◽  
Vol 29 (5) ◽  
pp. 620-639 ◽  
Author(s):  
William Bechtel
Keyword(s):  
Cognitive Control ◽  
Cognitive Science ◽  
Neural Control ◽  
Science Research ◽  
Control Mechanisms ◽  
Cognitive Mechanisms ◽  
Physiological Processes ◽  
High Level ◽  
And Behavior ◽  
Production Mechanisms

Cognitive science has traditionally focused on mechanisms involved in high-level reasoning and problem-solving processes. Such mechanisms are often treated as autonomous from but controlling underlying physiological processes. I offer a different perspective on cognition which starts with the basic production mechanisms through which organisms construct and repair themselves and navigate their environments and then I develop a framework for conceptualizing how cognitive control mechanisms form a heterarchical network that regulates production mechanisms. Many of these control mechanisms perform cognitive tasks such as evaluating circumstances and making decisions. Cognitive control mechanisms are present in individual cells, but in metazoans, intracellular control is supplemented by a nervous system in which a multitude of neural control mechanisms are organized heterarchically. On this perspective, high-level cognitive mechanisms are not autonomous, but are elements in larger heterarchical networks. This has implications for future directions in cognitive science research.

scholarly journals Distinct neural mechanisms meet challenges in dynamic visual attention due to either load or object spacing

2018 ◽  
Author(s):  
V. Mäki-Marttunen ◽  
T. Hagen ◽  
B. Laeng ◽  
T. Espeseth
Keyword(s):  
Visual Attention ◽  
Cognitive Processing ◽  
Brain Activity ◽  
Neural Mechanisms ◽  
Spatial Proximity ◽  
Physiological Mechanisms ◽  
Spatial Tasks ◽  
Spatial Interference ◽  
The Brain ◽  
Separate Cohort

AbstractWhen solving dynamic visuo-spatial tasks, the brain copes with perceptual and cognitive processing challenges. In the multiple-object tracking (MOT) task, the number of objects to be tracked (i.e. load) imposes attentional demands, but so does spatial interference from irrelevant objects (i.e. crowding). Presently, it is not clear whether load and crowding activate separate cognitive and physiological mechanisms. Such knowledge would be important to understand the neurophysiology of visual attention. Furthermore, it would help resolve conflicting views between theories of visual cognition, particularly concerning sources of capacity limitations. To address this problem, we varied the degree of processing challenge in the MOT task in two ways: First, the number of objects to track, and second, the spatial proximity between targets and distractors. We first measured task-induced pupil dilations and saccades during MOT. In a separate cohort we measured fMRI brain activity during MOT. The behavioral results in both cohorts revealed that increased load and crowding led to reduced accuracy in an additive manner. Load was associated with pupil dilations, whereas crowding was not. Activity in dorsal attentional areas and frequency of saccades were proportionally larger both with higher levels of load and crowding. Higher crowding recruited additionally ventral attentional areas that may reflect orienting mechanisms. The activity in the brainstem nuclei ventral tegmental area/substantia nigra and locus coeruleus showed clearly dissociated patterns. Our results constitute convergent evidence from independent samples that processing challenges due to load and object spacing may rely on different mechanisms.

scholarly journals A Systems Change Framework for Evaluating Academic Equity and Inclusion in an Ecology & Evolution Graduate Program

2019 ◽  
Author(s):  
Kelly J Wallace ◽  
Julia M York
Keyword(s):  
Graduate Students ◽  
Graduate Program ◽  
Systems Change ◽  
Power Dynamics ◽  
University Of Texas ◽  
Change Framework ◽  
And Behavior ◽  
The University ◽  
Stakeholder Needs ◽  
Equity And Inclusion

AbstractWhile academia is moving forward in terms of diversifying recruitment of undergraduate and graduate students, diverse representation is still not found across the academic hierarchy. At the graduate level, new discussions are emerging around efforts to improve the experiences of women and underrepresented minorities through inclusive graduate programming. Inclusive graduate programs are that which actively center and prioritize support for diverse experiences, identities, career goals, and perspectives, from recruitment through graduation. Establishing regular and rigorous evaluation of equity and inclusion efforts and needs is a critical component of this work. This is recognized by funding agencies that increasingly require reporting on inclusion efforts; here we suggest use of a systems change framework for these evaluations.A systems change approach emphasizes three levels: explicit change (e.g. policies), semi-explicit change (e.g. power dynamics), and implicit change (e.g. biases). We use the Ecology, Evolution, and Behavior (EEB) PhD Program at the University of Texas at Austin in an exercise to (1) identify areas of concern regarding inclusive programming voiced by graduate students, (2) categorize efforts to address these concerns, and (3) integrating and evaluating which areas of the systems change framework show the greatest progress or potential for progress. We argue this framework is particularly useful for academic systems as they are complex, composed of variable individuals, and must address diverse stakeholder needs.

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