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191.
Michael W. Cole Patryk Laurent Andrea Stocco 《Cognitive, affective & behavioral neuroscience》2013,13(1):1-22
The human ability to flexibly adapt to novel circumstances is extraordinary. Perhaps the most illustrative, yet underappreciated, form of this cognitive flexibility is rapid instructed task learning (RITL)—the ability to rapidly reconfigure our minds to perform new tasks from instructions. This ability is important for everyday life (e.g., learning to use new technologies) and is used to instruct participants in nearly every study of human cognition. We review the development of RITL as a circumscribed domain of cognitive neuroscience investigation, culminating in recent demonstrations that RITL is implemented via brain circuits centered on lateral prefrontal cortex. We then build on this and the recent discovery of compositional representations within lateral prefrontal cortex to develop an integrative theory of cognitive flexibility and cognitive control that identifies mechanisms that may enable RITL within the human brain. The insights gained from this new theoretical account have important implications for further developments and applications of RITL research. 相似文献
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Rémy Versace Agnès Auge Catherine Thomas-Antérion Bernard Laurent 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2013,20(2):127-134
Alzheimer’s disease (AD) patients and control subjects were tested in an affective priming paradigm associated with an affective discrimination task. Two pictures, one affectively positive or affectively negative and the other neutral, were presented simultaneously in the right and in the left visual fields; the participants had to decide which of the two pictures was the most affectively positive or negative. The target pictures were preceded by a prime picture that was either affectively positive, affectively negative, or neutral. The principal result was the observation, in AD patients as well as in control subjects, of negative affective priming effects for targets presented in the right hemisphere, and of positive affective priming effects for targets presented in the left hemisphere. The presence of affective priming effects suggests that AD patients have no particular deficit in the automatic activation of emotional information; the fact that priming effects were also observed for targets presented in the left hemisphere showed that AD patients probably have no left hemisphere deficit in the automatic activation of emotional information. However, in AD patients, affective priming effects were significant with negative targets but not with positive targets, which could suggest that AD patients processed positive targets in a more semantic way than negative targets. 相似文献
194.
Céline Borg Catherine Thomas-Antérion Soline Bogey Karine Davier Bernard Laurent 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2013,20(5):603-614
ABSTRACT The study of memory for famous people and visual imagery retrieval was investigated in patients in the early stages of Alzheimer's disease (AD) and in the prodromal stage of AD, so-called Mild Cognitive Impairment (MCI). Fifteen patients with AD (MMSE ≥23), 15 patients with amnestic MCI (a-MCI) and 15 normal controls (NC) performed a famous names test designed to evaluate the semantic and distinctive physical features knowledge of famous persons. Results indicated that patients with AD and a-MCI generated significantly less physical features and semantic biographical knowledge about famous persons than did normal control participants. Additionally, significant differences were observed between a-MCI and AD patients in all tasks. The present findings confirm recent studies reporting semantic memory impairment in MCI. Moreover, the current findings show that mental imagery is lowered in a-MCI and AD and is likely related to the early semantic impairment. 相似文献
195.
Obiang P Maubert E Bardou I Nicole O Launay S Bezin L Vivien D Agin V 《Neurobiology of learning and memory》2011,96(2):121-129
Although tissue type plasminogen activator (tPA) and brain derived neurotrophic factor (BDNF) have been extensively described to influence brain outcomes in a number of disorders, their roles during physiological aging are poorly investigated. In the present study, we investigated whether maintenance of mice in different environmental conditions could influence age-associated changes in hippocampal tPA expression and BDNF maturation in relation with modifications of their cognitive performances. Our data indicate that maintenance in enriched housing led to a reversal of age-associated decrease in expression of hippocampal tPA. A subsequent increase in the level of mature BDNF and an improvement in emotional and spatial memories were observed. Taken together, these data suggest that the tPA–BDNF axis could play a critical role in the control of cognitive functions influenced both by the age and housing conditions. 相似文献
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Motion-induced blindness (MIB) is the perceived disappearance of a salient target when surrounded by a moving mask. Much research has focused on the role of target characteristics on perceived disappearance by a coherently moving mask. However, we asked a different question: mainly, are there certain characteristics about the mask that can impact disappearance? To address this, we behaviorally tested whether MIB is enhanced or reduced by the property of common fate. In experiments 1, 2, and 3, we systematically manipulated the motion coherence of the mask and measured the amount of target disappearance. Results showed that, as mask coherence increased, perceived target disappearance decreased. This pattern was unaffected by the lifetime of the moving dots, the dot density of the motion stimulus, or the target eccentricity. In experiment 4, we investigated whether the number of motion directions contained in an incoherent mask could account for our findings. Using masks containing 1, 3, and 5 motion directions, we found that disappearance did not increase proportionally to the number of motion directions. We discuss our findings in line with current proposed mechanisms of MIB. 相似文献
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Jesse J. Naghi Kiran J. Philip Anita Phan Laurent Cleenewerck Ernst R. Schwarz 《Journal of religion and health》2012,51(4):1124-1136
Heart failure (HF) is a chronic progressive disease with marked morbidity and mortality. Patients enduring this condition suffer from fluctuations in symptom burden such as fatigue, shortness of breath, chest pain, sexual dysfunction, dramatic changes in body image and depression. As physicians, we often ask patients to trust in our ability to ameliorate their symptoms, but oftentimes we do not hold all of the answers, and our best efforts are only modestly effective. The suffering endured by these individuals and their families may even call into question one??s faith in a higher power and portends to significant spiritual struggle. In the face of incurable and chronic physical conditions, it seems logical that patients would seek alternative or ancillary methods, notably spiritual ones, to improve their ability to deal with their condition. Although difficult to study, spirituality has been evaluated and deemed to have a beneficial effect on multiple measures including global quality of life, depression and medical compliance in the treatment of patients with HF. The model of HF treatment incorporates a multidisciplinary approach. This should involve coordination between primary care, cardiology, palliative care, nursing, patients and, importantly, individuals providing psychosocial as well as spiritual support. This review intends to outline the current understanding and necessity of spirituality??s influence on those suffering from HF. 相似文献