Neural dynamics was assessed by means of EEG coherence in the beta frequency band (13-30 Hz) and included intrahemispheric, interhemispheric and midline connectivity profiles. Results showed that coherence intensified across the motor network during dual tasking for unimanual tapping, which permitted to preserve performance. For bimanual tapping, strengthening of functional connectivity was not observed for interhemispheric and midline regions, which associated with a degradation of coordinative output. The latter underlines the significance of these communication pathways for bimanual behaviour.
Overall, the findings indicate that dynamic modulation of functional connectivity patterns provides a substrate for preserving behaviour in effortful circumstances such as dual tasking. (C) 2008 Elsevier Ltd. All rights reserved.”
“Purpose: We investigated the relationship between physician clinical experience and inappropriate prostate PD173074 specific https://www.selleckchem.com/products/hsp990-nvp-hsp990.html antigen testing using a Taiwan nationwide population based data set. We used physician age as a surrogate for general practice experience and the frequency of ordered prostate specific antigen tests as a surrogate for procedure specific experience.
Materials and Methods: This study used data sourced from the 2005 Taiwan National Health Insurance Research Database. We extracted
all patients who underwent prostate specific antigen isothipendyl tests in 2005 and their corresponding physicians. A total of 24,595 patients and 2,086 physicians were included. Physician age was categorized into 8 age groups of younger than 31, 31 to 35, 36 to 40, 41 to 45, 46 to 50, 51 to 55, 56 to 60 and 60 years or older. Physicians were divided into 4 groups according to the frequency of prostate specific antigen tests ordered in 40 to 75-year-old patients, including
low frequency-less than 1 case per 3 months, medium-between 1 in 3 months and 1 per month, high-between 1 per month and 1 per week, and very high-greater than 1 per week.
Results: In sampled physicians the mean +/- SD rate of inappropriate prostate specific antigen test use was 30.8% +/- 36.6%. Multiple regression analysis showed that after adjusting for other factors physicians who ordered fewer prostate specific antigen tests (those in the low and medium frequency groups) had a higher rate of inappropriate PSA test use than their counterparts who ordered prostate specific antigen tests with very high frequency (each p < 0.001) Furthermore, physicians in the age groups 30 years or younger and 31 to 35 years had higher rates of inappropriate prostate specific antigen testing than their counterparts in the 41 to 45-year-old group (p = 0.019 and 0.010, respectively).
Conclusions: The likelihood of inappropriate prostate specific antigen screening was significantly and negatively associated with physician clinical experience.