Toward An Integral Process Theory Of Human Dynamics:Dancing The Universal Tango
Social sciences (General)
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AbstractThis article is an outline toward developing a fuller process theory of human dynamics aimed at practical applications by a diverse audience. The theory represents a transdisciplinary synthesis of a universal pattern and integrates humans’ projection dynamics with complex systems dynamics. Five premises, presented in lay language with examples, capture basic elements involved in the meta process of human development and change: reciprocity, projection, development’s structural limits, oscillations, and structural coupling. Based on a fractal dialectical pattern that shows up wherever complex systems are involved, the theory’s applications are scalable. It could be useful for personal development, public policy design, issue analysis, and systemic action on intransigent issues. It may be a complementary adjunct to developmental stage theories because it deals in an accessible way with the processes involved in stage transitions. Throughout the article, its practical relevance at some individual, social, and political scales is illustrated or mentioned. Readers interested in individual and social change may gain a sense of the human dynamics involved in it, and thus the potential usefulness of a process theory that describes what goes on in human change and development.
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Aggravation of chronic stress effects on hippocampal neurogenesis and spatial memory in LPA₁ receptor knockout mice.Castilla-Ortega, Estela; Hoyo-Becerra, Carolina; Pedraza, Carmen; Chun, Jerold; Rodríguez De Fonseca, Fernando; Estivill-Torrús, Guillermo; Santín, Luis J (Public Library of Science, 2012-12-10)BACKGROUND The lysophosphatidic acid LPA₁ receptor regulates plasticity and neurogenesis in the adult hippocampus. Here, we studied whether absence of the LPA₁ receptor modulated the detrimental effects of chronic stress on hippocampal neurogenesis and spatial memory. METHODOLOGY/PRINCIPAL FINDINGS Male LPA₁-null (NULL) and wild-type (WT) mice were assigned to control or chronic stress conditions (21 days of restraint, 3 h/day). Immunohistochemistry for bromodeoxyuridine and endogenous markers was performed to examine hippocampal cell proliferation, survival, number and maturation of young neurons, hippocampal structure and apoptosis in the hippocampus. Corticosterone levels were measured in another a separate cohort of mice. Finally, the hole-board test assessed spatial reference and working memory. Under control conditions, NULL mice showed reduced cell proliferation, a defective population of young neurons, reduced hippocampal volume and moderate spatial memory deficits. However, the primary result is that chronic stress impaired hippocampal neurogenesis in NULLs more severely than in WT mice in terms of cell proliferation; apoptosis; the number and maturation of young neurons; and both the volume and neuronal density in the granular zone. Only stressed NULLs presented hypocortisolemia. Moreover, a dramatic deficit in spatial reference memory consolidation was observed in chronically stressed NULL mice, which was in contrast to the minor effect observed in stressed WT mice. CONCLUSIONS/SIGNIFICANCE These results reveal that the absence of the LPA₁ receptor aggravates the chronic stress-induced impairment to hippocampal neurogenesis and its dependent functions. Thus, modulation of the LPA₁ receptor pathway may be of interest with respect to the treatment of stress-induced hippocampal pathology.
Life-long environmental enrichment counteracts spatial learning, reference and working memory deficits in middle-aged rats subjected to perinatal asphyxia.Galeano, Pablo; Blanco, Eduardo; Logica Tornatore, Tamara M A; Romero, Juan I; Holubiec, Mariana I; Rodríguez de Fonseca, Fernando; Capani, Francisco (Frontiers Media, 2016-08-09)Continuous environmental stimulation induced by exposure to enriched environment (EE) has yielded cognitive benefits in different models of brain injury. Perinatal asphyxia results from a lack of oxygen supply to the fetus and is associated with long-lasting neurological deficits. However, the effects of EE in middle-aged rats suffering perinatal asphyxia are unknown. Therefore, the aim of the present study was to assess whether life-long exposure to EE could counteract the cognitive and behavioral alterations in middle-aged asphyctic rats. Experimental groups consisted of rats born vaginally (CTL), by cesarean section (C+), or by C+ following 19 min of asphyxia at birth (PA). At weaning, rats were assigned to standard (SE) or enriched environment (EE) for 18 months. During the last month of housing, animals were submitted to a behavioral test battery including Elevated Plus Maze, Open Field, Novel Object Recognition and Morris water maze (MWM). Results showed that middle-aged asphyctic rats, reared in SE, exhibited an impaired performance in the spatial reference and working memory versions of the MWM. EE was able to counteract these cognitive impairments. Moreover, EE improved the spatial learning performance of middle-aged CTL and C+ rats. On the other hand, all groups reared in SE did not differ in locomotor activity and anxiety levels, while EE reduced locomotion and anxiety, regardless of birth condition. Recognition memory was altered neither by birth condition nor by housing environment. These results support the importance of environmental stimulation across the lifespan to prevent cognitive deficits induced by perinatal asphyxia.
VIDEO: Session 3: Managing our Public Lands for Extractive UsesKovacs, Kathryn; Flynn, Roger; Watson, Rebecca (Colorado Law Scholarly Commons, 2016-10-21)VIDEO: 1:15 p.m. - 2:30 p.m. SESSION 3: Managing our Public Lands for Extractive Uses Moderator and Commentator: Marcilynn Burke, University of Houston Law Center Speakers: Kathryn Kovacs, Bureau of Land Management Roger Flynn, Western Mining Action Project Rebecca Watson, Wellborn, Sullivan, Meck, and Tooley, P.C.