Reevaluation of the indoleamine hypothesis ..

In the present study we tested the hypothesis that moderate-sized unilateral metabolic abnormalities will be associated with poor cognitive outcomes, whereas small or extensive areas of unilateral glucose hypometabolism will be associated with relatively cognitive function in children with SWS. We also tested if this presumed relationship between hemispheric hypometabolism and cognitive functions is affected by age, seizure variables, lesion side and location or severity of hypometabolism. Further, we aimed to determine if there is a threshold in the extent of hemispheric hypometabolism above which cognitive functions started to increase above severe impairment. Finally, we tested if seizure-related variables explained the IQ variations seen in patients with only mild (or no) metabolic abnormalities.

Reevaluation of the indoleamine hypothesis of depression

One proposed hypothesis is that arm use practiced for the specific purpose of ..

An Evaluation of the Hypothesis.

We acknowledge that our hypothesis-testing framework only provides one aspect of importance and relevance to management, namely the informational component. Much more than good ecological information is needed to realize adaptive management and build general ecosystem resilience. We emphasize that the framework can help provide high quality and timely information to feed into management processes, and thereby contribute to building resilience without inadvertently implying that improved understanding and monitoring is some sort of panacea.

Assessment of Risk | Statistical Hypothesis Testing | Risk

Two implications follow from different test outcomes. If repeated hypotheses verification confirms the new system regime, management decisions may be taken based on normative values for society. That is, if the new regime provides desirable ecosystem service bundles to humans, management can aim at fostering this novel regime. In contrast, if the new regime is undesirable, management interventions can focus on weakening the resilience of this regime, transforming the system and stabilizing it in a new alternative regime (Fig. 2).

[Characteristics of the functional coupling of cerebral cortical neurons in cats and the signal meaning of the stimulus (the hypothesis ..
02/01/2018 · HYPOTHESIS back to top . Hypothesis: Early recovery of auditory language functions after left hemispherectomy is …

Contrary to our hypothesis, we found that functional ..

First proposed by Lewontin (1969), the idea that ecological systems can exist in alternative stable regimes has gained much empirical support. Ecologists have used the concept from community and ecosystem perspectives (Beisner et al. 2003). The community approach originated from theoretical population ecology where stability is measured by the ability of populations to withstand direct perturbations, for example, changes in the structure of predators in food webs. This continues to be the focus in community ecology where different configurations of the communities represent different regimes resulting from community assembly and succession (e.g., Jiang et al. 2011). The ecosystem approach is derived from the parameter perturbation framework in population ecology and focuses on how environmental shifts affect parameters that determine the resilience of particular ecosystem regimes (Scheffer et al. 2001, Dent et al. 2002). Both perspectives are not mutually exclusive and have management relevance. Overfishing of top predators in marine environments releases lower trophic levels from top-down pressure in the food webs, which, combined with climate warming and eutrophication, can lead to ecosystem regimes with more frequent jellyfish outbreaks and reduced ecosystem services (Purcell et al. 2007).

Origin of Flowering Plants, Origin of Angiosperms, Triassic Origin of Angiosperms, Paraphyletic Origin of Flowering Plants, Coevolutionary Hypothesis

Dynamic functional reorganization of the motor ..

We hypothesize that the self-regulatory circuitry that responds to stress and reflects potentiation involves three phases: 1) quick sub-cortical processing phase (responses of the HPA and SMA axes), which is non-specific, evolutionarily based and primarily emotive (based in fear) (34); 2) cortical/cognitive processing of emotions into conscious feelings based on expectations and past experiences – the second phase concludes with the identification of needs; 3) generation of thoughts and actions to marshal a corrective response to meet those perceived needs. The process, if adaptive, returns the person to a state of well-being.

19/12/2017 · Inter-hemispheric language functional reorganization ..

Functional MRI Correlates of Early Language Recovery …

Alternative stable regimes are stabilized by self-reinforcing feedbacks, which are complex sets of mechanistically intertwined processes that can operate over different spatial and temporal extents. A well-described example are the clear-water, macrophyte-dominated, and the alternative turbid, phytoplankton-dominated regimes in shallow lakes (Scheffer et al. 2001), in which the interplay between phytoplankton, submerged vegetation and planktivorous and piscivorous fish affect and are affected by water quality, particularly nutrient concentrations (Scheffer 2004). Breaking the feedbacks of the turbid regime to restore the clear-water regime in shallow lakes has proven difficult in many cases, despite high financial and other resource investments (sediment stabilization, control of planktivorous and benthivorous fish, stocking of piscivorous fish, nutrient precipitation, and macrophyte replanting in restoration programs; Moss 1990, Gulati and van Donk 2002, Jeppesen et al. 2007). Lake restoration efforts often fail because self-organized patterns are characterized by hysteresis that complicates restoration after regime shifts (Suding et al. 2004, Hobbs 2007).