Objectives: The present study assessed the potential cognitive-enhancing effects of citicoline, a dietary supplement, in healthy adult women. Specifically, it was hypothesized that citicoline supplementation would be ...Objectives: The present study assessed the potential cognitive-enhancing effects of citicoline, a dietary supplement, in healthy adult women. Specifically, it was hypothesized that citicoline supplementation would be associated with improved attention compared to placebo. Methods: The investigation was a double-blind, randomized, placebo-controlled three-arm study. Sixty healthy adult women ages 40 - 60 completed a clinical screening visit, including a medical exam. After study enrollment each subject was randomly assigned to one of three groups: a daily oral dose of 250 mg citicoline, 500 mg citicoline, or placebo for 28 days. Participants were evaluated with the Continuous Performance Test II (CPT-II), a measure sensitive to attentional function, during a baseline visit and 28 days after baseline. Results: All 60 participants were included in the analyses, which included an ANOVA with Tukey’s post-hoc tests and t-tests. After 28 days of supplementation, individuals in the 250 mg group made fewer omission (p = 0.04) and commission (p = 0.03) errors compared to those in the placebo group. Individuals in the 500 mg group made significantly fewer commission errors compared to those in the placebo group (p = 0.03) and trended toward making fewer omission errors (p = 0.07). Conclusion: After 28 days of daily citicoline supplementation, participants who were administered either the 250 mg or the 500 mg citicoline doses showed significantly better ability to produce correct responses on the CPT-II, likely due to improved cognitive inhibition. Our findings suggest that citicoline may improve attentional performance in middle-aged women and may ameliorate attentional deficits associated with central nervous system disorders.展开更多
Built environments can induce contemplative states, but direct evidence for their impact on the brain is lacking. This exploratory work investigated brain correlates of internal states elicited by architecture designe...Built environments can induce contemplative states, but direct evidence for their impact on the brain is lacking. This exploratory work investigated brain correlates of internal states elicited by architecture designed for contemplative experience. Functional MRI and self-reports of 12 architects were assessed to study their responses to photographs of ordinary and contemplative architectures. Images of contemplative buildings： （1） induced attentive, receptive, and absorbing experiences and diminished internal dialogue; （2） involved decreased engagement of prefrontal cortex; and （3） activated the occipital lobe, precentra[ gyrus, and inferior parietal lobule. They suggest that viewing buildings designed for contemplation may evoke experiential and brain signatures that consistently differ from those induced by buildings that serve everyday functions. The depth of such externally induced states was inversely correlated with the engagement of the Default Mode Network. Our study points toward a novel avenue for investigating how contemplation can be cultivated in the human brain/mind.展开更多
文摘Objectives: The present study assessed the potential cognitive-enhancing effects of citicoline, a dietary supplement, in healthy adult women. Specifically, it was hypothesized that citicoline supplementation would be associated with improved attention compared to placebo. Methods: The investigation was a double-blind, randomized, placebo-controlled three-arm study. Sixty healthy adult women ages 40 - 60 completed a clinical screening visit, including a medical exam. After study enrollment each subject was randomly assigned to one of three groups: a daily oral dose of 250 mg citicoline, 500 mg citicoline, or placebo for 28 days. Participants were evaluated with the Continuous Performance Test II (CPT-II), a measure sensitive to attentional function, during a baseline visit and 28 days after baseline. Results: All 60 participants were included in the analyses, which included an ANOVA with Tukey’s post-hoc tests and t-tests. After 28 days of supplementation, individuals in the 250 mg group made fewer omission (p = 0.04) and commission (p = 0.03) errors compared to those in the placebo group. Individuals in the 500 mg group made significantly fewer commission errors compared to those in the placebo group (p = 0.03) and trended toward making fewer omission errors (p = 0.07). Conclusion: After 28 days of daily citicoline supplementation, participants who were administered either the 250 mg or the 500 mg citicoline doses showed significantly better ability to produce correct responses on the CPT-II, likely due to improved cognitive inhibition. Our findings suggest that citicoline may improve attentional performance in middle-aged women and may ameliorate attentional deficits associated with central nervous system disorders.
文摘Built environments can induce contemplative states, but direct evidence for their impact on the brain is lacking. This exploratory work investigated brain correlates of internal states elicited by architecture designed for contemplative experience. Functional MRI and self-reports of 12 architects were assessed to study their responses to photographs of ordinary and contemplative architectures. Images of contemplative buildings： （1） induced attentive, receptive, and absorbing experiences and diminished internal dialogue; （2） involved decreased engagement of prefrontal cortex; and （3） activated the occipital lobe, precentra[ gyrus, and inferior parietal lobule. They suggest that viewing buildings designed for contemplation may evoke experiential and brain signatures that consistently differ from those induced by buildings that serve everyday functions. The depth of such externally induced states was inversely correlated with the engagement of the Default Mode Network. Our study points toward a novel avenue for investigating how contemplation can be cultivated in the human brain/mind.
