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Elvin Geng and co-authors discuss monitoring and achieving equity in provision of vaccines for COVID-19.The tomato flowers are characterized by possessing poricidal anthers, which restrict the exit of the pollen to a tiny opening on the apex of the anther. To extract pollen efficiently, some visiting bees grasp the anthers and quickly contracting their flight muscles, producing vibrations and an audible sound. The vibrations are transferred to the anthers, shaking and stimulating the pollen inside them to leave by the pores, a phenomenon known as floral sonication or buzz-pollination. DOI pcbi.1009426 Image Credit Priscila de CE1;ssia Souza AraFA;jo (co-author of the manuscript) photographed this bee visiting flowers of tomato plants grown at the experimental fields of the Federal University of ViE7;osa (Minas Gerais State, Brazil). We confirm that the image can publish under the Creative Commons Attribution License (https//creativecommons.org/licenses/by/4.0/). The authors own the copyright for the image and confirm that agree with open Access License of PLOS Computational Biology.Living in an uncertain world, nearly all of our decisions are made with some degree of uncertainty about the consequences of actions selected. Although a significant progress has been made in understanding how the sensorimotor system incorporates uncertainty into the decision-making process, the preponderance of studies focus on tasks in which selection and action are two separate processes. First people select among alternative options and then initiate an action to implement the choice. However, we often make decisions during ongoing actions in which the value and availability of the alternatives can change with time and previous actions. The current study aims to decipher how the brain deals with uncertainty in decisions that evolve while acting. To address this question, we trained individuals to perform rapid reaching movements towards two potential targets, where the true target location was revealed only after the movement initiation. We found that reaction time and initial approach direction are correlated, where initial movements towards intermediate locations have longer reaction times than movements that aim directly to the target locations. Interestingly, the association between reaction time and approach direction was independent of the target probability. By modeling the task within a recently proposed neurodynamical framework, we showed that action planning and control under uncertainty emerge through a desirability-driven competition between motor plans that are encoded in parallel.In the hippocampus, episodic memories are thought to be encoded by the formation of ensembles of synaptically coupled CA3 pyramidal cells driven by sparse but powerful mossy fiber inputs from dentate gyrus granule cells. The neuromodulators acetylcholine and noradrenaline are separately proposed as saliency signals that dictate memory encoding but it is not known if they represent distinct signals with separate mechanisms. Here, we show experimentally that acetylcholine, and to a lesser extent noradrenaline, suppress feed-forward inhibition and enhance Excitatory-Inhibitory ratio in the mossy fiber pathway but CA3 recurrent network properties are only altered by acetylcholine. We explore the implications of these findings on CA3 ensemble formation using a hierarchy of models. In reconstructions of CA3 pyramidal cells, mossy fiber pathway disinhibition facilitates postsynaptic dendritic depolarization known to be required for synaptic plasticity at CA3-CA3 recurrent synapses. We further show in a spiking neural network model of CA3 how acetylcholine-specific network alterations can drive rapid overlapping ensemble formation. Thus, through these distinct sets of mechanisms, acetylcholine and noradrenaline facilitate the formation of neuronal ensembles in CA3 that encode salient episodic memories in the hippocampus but acetylcholine selectively enhances the density of memory storage.

The first Covid-19 epidemic outbreak has enormously impacted the delivery of clinical healthcare and hospital management practices in most of the hospitals around the world. In this context, it is important to assess whether the clinical management of non-Covid patients has not been compromised. Among non-Covid cases, patients with Acute Myocardial Infarction (AMI) and stroke need non-deferrable emergency care and are the natural candidates to be studied. Preliminary evidence suggests that the time from onset of symptoms to emergency department (ED) presentation has significantly increased in Covid-19 times as well as the 30-day mortality and in-hospital mortality.

We check, in a causal inference framework, the causal effect of the hospital’s stress generated by Covid-19 pandemic on in-hospital mortality rates (primary end-point of the study) of AMI and stroke over several time-windows of 15-days around the implementation date of the State of Emergency restrictions for COVID-19 (March, 9th 2020) using two rates for AMI and stroke patients provides evidence of the hospital ability to manage -with the implementation of a dual track organization- the simultaneous delivery of high-quality cares to both Covid and non-Covid patients.Correct decision making is fundamental for all living organisms to thrive under environmental changes. The patterns of environmental variation and the quality of available information define the most favourable strategy among multiple options, from randomly adopting a phenotypic state to sensing and reacting to environmental cues. Cellular memory-the ability to track and condition the time to switch to a different phenotypic state-can help withstand environmental fluctuations. How does memory manifest itself in unicellular organisms? We describe the population-wide consequences of phenotypic memory in microbes through a combination of deterministic modelling and stochastic simulations. Moving beyond binary switching models, our work highlights the need to consider a broader range of switching behaviours when describing microbial adaptive strategies. We show that memory in individual cells generates patterns at the population level coherent with overshoots and non-exponential lag times distributions experimentally observed in phenotypically heterogeneous populations. We emphasise the implications of our work in understanding antibiotic tolerance and, in general, bacterial survival under fluctuating environments.BACKGROUND Guillain-Barre syndrome (GBS) is an autoimmune disease of the peripheral nervous system. It has multiple presentations, demyelinating or axonal, according to the pattern of injury. In general, there are cardinal symptoms, such as areflexia and ascending symmetrical lower limb weakness. GBS has multiple different variants. Acute inflammatory demyelinating polyradiculoneuropathy (AIDP) is the most common type. Other known variants are acute motor and sensory axonal neuropathy, acute motor axonal neuropathy, acute sensory neuropathy, acute pan dysautonomia, and Miller Fisher syndrome. CASE REPORT In the present case, the patient had initial symptoms of distal bilateral paresthesia and 12 days later he developed left facial muscle weakness, a decrease in ability to taste, and right facial muscle weakness. Two days later the patient said he did not have limb weakness. Selleckchem FB23-2 On examination, he had bilateral lower motor facial palsy, the power in his upper and lower right limbs was 4/5, and he had bilateral upper limb hyperreflexia. Results of a nerve conduction study were consistent with acute demyelinating polyneuropathy with secondary axonal loss. The patient was treated with immunoglobulin G, 0.4 mg/kg/d for 5 days, and fully recovered. CONCLUSIONS Facial diplegia is one of the GBS variants that presents rarely as pure bilateral facial weakness or is preceded by bilateral lower limb weakness. The present case underscores that patients with GBS may have facial diplegia before weakness. Also, they may not have areflexia as a cardinal feature, and instead, hyperreflexia may be seen. Although hyperreflexia has been reported in association with the acute motor axonal variant, the present case shows that hyperreflexia also can be found with AIDP.High ambient temperatures and strenuous physical activity put workers at risk for a variety of heat-related illnesses and injuries. Through primary prevention, secondary prevention, and treatment, OEM health providers can protect workers from the adverse effects of heat. This statement by the American College of Occupational and Environmental Medicine provides guidance for OEM providers who serve workers and employers in industries where heat exposure occurs.

To assess the relationship between anxiety and shift work of healthcare workers (HCWs) during COVID-19 pandemic.

From four COVID-19-dedicated hospitals in Korea, 381 HCWs were analyzed to estimate anxiety in relation to four COVID-19 job stressors and the impact of shift work on this relationship. Anxiety was measured with a generalized anxiety disorder 7-item scale. Multiple logistic regression models were utilized after stratification by sex, occupation, and shift work, after adjusting for a number of variables.

Anxiety prevalence was 32%. Among female nurses or nursing assistants who performed shift work, anxiety risk was significantly associated with three COVID-19 related job stressors contact with confirmed cases or patients, dealing with unpleasant patients, and discomfort from wearing protective equipment.

Special attention is required for mental health of HCWs working shifts during the COVID-19 pandemic.

Special attention is required for mental health of HCWs working shifts during the COVID-19 pandemic.

An open trial of an internet-based Cognitive Behavioural Therapy (iCBT) program for healthcare workers was conducted.

Healthcare workers on disability leave who used the iCBT program were assessed on self-reported depression and anxiety symptoms using the Depression Anxiety Stress Scales-21; and, program usage. Healthcare workers’ experience of using iCBT was evaluated in a separate survey.

Of the 497 healthcare workers referred to the iCBT program, 51% logged in, 25% logged in more than once, and 12% logged in more than once and completed at least two assessments. For the latter group, self-reported depression and anxiety symptoms significantly decreased from the first assessment.

This iCBT program was perceived to be of benefit to healthcare workers, with program usage and effectiveness that was similar to what has been previously reported for unguided iCBT.

This iCBT program was perceived to be of benefit to healthcare workers, with program usage and effectiveness that was similar to what has been previously reported for unguided iCBT.

Examine the association of discrimination and short sleep and the buffering effect of people-oriented culture in the workplace among nurses and patient care associates.

Used a mixed-methods design from the 2018 Boston Hospital Workers Health Study (N = 845) and semi-structured interviews among nurse directors (N = 16).

We found that people-oriented culture reduced the odds of short sleep and slightly attenuated the association of discrimination and short sleep. People-oriented culture did not buffer the effects of discrimination on short sleep. Qualitative findings showed that discrimination occurred between co-workers in relation to their job titles and existing support in the workplace does not address discrimination.

Healthcare industries need to implement specific programs and services aimed at addressing discrimination which can potentially improve health outcomes among workers.

Healthcare industries need to implement specific programs and services aimed at addressing discrimination which can potentially improve health outcomes among workers.