Neuroenhancement of a dexterous motor task with anodal tDCS.

Motor skill learning can cause structural and functional changes in the primary motor cortex (M1) leading to cortical plasticity that can be associated with the performance change during the motor skill that is practiced. Similarly, anodal transcranial direct current stimulation (a-tDCS) has been shown to facilitate and enhance plasticity in M1, causing even greater motor skill improvement. By using a fine motor task (O'Connor Tweezer Dexterity Task) in combination with a-tDCS we theorized that a-tDCS could increase the speed of skill acquisition. Forty subjects were recruited and randomized into either a-tDCS or SHAM groups. Subjects completed a single session performing the O'Connor Tweezer Dexterity Task with their non-dominant hand while receiving either a-tDCS stimulation or SHAM stimulation of the hand region of M1. The time it took to place 50- pins was assessed before and after 20 min of practice with a-tDCS or SHAM. We found that both groups had similar pre-test performance (P = 0.94) and they both had a similar amount of practice pins placed (P = 0.69). However, the a-tDCS group had a greater improvement than the SHAM group (p = 0.028) for overall learning from pretest to posttest. These results suggest that a-tDCS improved the rate of motor learning and fine motor task performance. These results are in line with previous research and demonstrate that a-tDCS applied to M1 can increase manual precision and steadiness needed for delicate tasks and could have implications in the advancement of surgical training as well as in athletic, military, and other occupational settings.

Survey-derived best management practices for backyard beekeepers improve colony health and reduce mortality.

Honey bee colony losses in the US have exceeded acceptable levels for at least a decade, leaving beekeepers in need of management practices to improve colony health and survival. Here, an empirical Best Management Practice (BMP) regimen was tested, comprised of the top four management practices associated with reduced colony mortality in backyard beekeeping operations according to Bee Informed Partnership Loss and Management survey results. Seven study locations were established across the US, and each location consisted of ten colonies treated according to empirical BMPs and ten according to average beekeeping practice. After 3 years, colonies treated according to empirical BMPs experienced reduced Varroa infestation, viral infection, and mortality compared to colonies managed with Average practices. In addition, BMP colonies produced more new colonies via splits. The colonies under Average practices were given chemical Varroa treatments only once per year, and thus spent more months above economic threshold of 3.0 mites/100 bees. Increased time spent above the economic threshold was significantly correlated to both increased viral infection and colony mortality. This study demonstrates the cumulative effects of management and colony health stressors over months and years, especially the dire importance of regular Varroa monitoring and management.

Asthma Predictors Influence on Self-management Asthma Education Status.

Objective The objective of this study was to determine the characteristics of adults with active asthma who were most likely to acquire self-management asthma component education. Methods We analyzed adult data from the 2014 Behavioral Risk Factor Surveillance System (BRFSS)-Asthma Call-back Survey (ACBS). Multivariate logistic regression and multivariate linear regression models were used to analyze the association between asthma self-management education and predictors. Results Adults who had health insurance (aB = 0.33 [SE = 0.15], p < .05), routine care visits (aB = 0.75 [SE = 0.08], p < .05) and hospitalization (aB = 0.50 [SE = 0.23], p < .05) reported higher asthma education scores. Adults aged 18-34 years were more likely to report inhaler use instruction (aOR = 3.9; 95% CI: 2.5-6.3, p < .05), than older adults aged 65 years and older. Having a formal education, being a woman, and being black increased the likelihood of having a higher self-management score. Conclusion Having health insurance, making routine visits, and having asthma episodes were associated with multiple asthma education components which ensures social justice. Asthma control programs need to reexamine asthma education components to make sure they are promoted to persons regardless of their age, education level, or sex."