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11.
C. Thomas Antrion P. Convers S. Desmales C. Borg B. Laurent 《Clinical neurophysiology》2008,38(3):177-182
We report the case of a patient who presented visual hallucinations and identification disorders associated with a Capgras syndrome. During the Capgras periods, there was not only a misidentification of his wife's face, but also a more global perceptive and emotional sexual identification disorder. Thus, he had sexual intercourse with his wife's "double" without having the slightest recollection feeling of familiarity towards his "wife" and even changed his sexual habits. To the best of our knowledge, he is the only neurological patient who made his wife a mistress. Starting from this global familiarity loss, we discuss the mechanism of Capgras delusion with reference to the role of the implicit system of face recognition. Such behavior of familiarity loss not only with face but also with all intimacy aspects argues for a specific disconnection between the ventral visual pathway of face identification and the limbic system involved in emotional and episodic memory contents. 相似文献
12.
A Ungerer 《Physiology & behavior》1973,11(3):323-327
Mice injected subcutaneously with AXM (7 mg/kg) 60 minutes or less after acquisition of a nondiscriminative instrumental task, show low levels of lever press responding, when tested 6 days after the treatment. AXM injected 180 min after acquisition has no effect whatsoever on the performance. The analysis of various parameters such as, (1) the number of nonreinforced responses (A) preceding the first reinforced response (AR), and (2) the latency of the first reinforced response, shows that only the animals treated with AXM during the first 3 min following acquisition differ significantly from the control animals: they seem to have forgotten the significance of the lever. On the contrary, the low levels of responding observed in the animals treated 30–60 min after acquisition does not seem to be due to a nonretention of the significance of the liver. The mechanisms by which the AXM affects the level of responding remain obscure. 相似文献
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Introduction
The main objective of this review is to present a new approach to the memory deficit in Alzheimer's disease. Recent memory models suggest that information is recovered either on the basis of recollection or on the basis on familiarity. Recollection, unlike familiarity, requires the retrieval of contextual details related to the encoded information.State of the art
This review suggests that recollection is particularly affected in Alzheimer's disease. In contrast, familiarity seems to be relatively preserved. A related deficit in metamemory is observed when recollection is required; a decrease in recollection in Alzheimer's disease could explain the pattern of metamemory problems. The deficit in recollection could be explained by a disconnection between medial temporal areas and frontal areas.Perspectives
This novel approach to memory gives research perspectives concerning both early diagnosis and rehabilitation strategies of Alzheimer disease.Conclusion
This overview showed deficits in conscious memory processes conceived of as recollection. These novel insights should provide new explanations for the deficits observed in Alzheimer's disease, particularly metamemory. 相似文献14.
Better knowledge of the preclinical phase of Alzheimer's disease and of the symptomatic pre-dementia stage designated "mild cognitive impairment" will require considerable progress in our understanding of neuropsychological processes. The results of studies suggest that impaired performance in memory tests may serve as a marker for Alzheimer's disease. The best current predictors include stringent tests of episodic memory and recognition tests. The early stages of Alzheimer's disease also seem to involve subtle deficits in semantic memory and attentional processes. Face recognition and denomination seem to be useful tools. Greater accuracy and precision in the transitional zone between healthy aging and the first manifestations of Alzheimer's disease will require work combining data on neuropsychological profiles and neuroimaging. 相似文献
15.
《L'Encéphale》2022,48(2):132-138
BackgroundCannabis is the most widely used illicit drug in the world. It is responsible for cognitive dysfunction of memory, speed of information processing, attention, and executive functions. Cognitive performance depends on the level of study, tolerance, and duration of abstinence from cannabis use. This study analyses cognitive function in a large population of regular cannabis consumers taking into account level of education.MethodsA battery of neuropsychological tests using the Cambridge Neuropsychological Test Automated Battery was performed on a population of 58 cannabis users categorized into two groups according to their level of education with a threshold of 12 years of study, and 25 non-users.ResultsIn Attention Switching Task percent correct trials, significant differences were found between the group of cannabis smokers with less than 12 years of study and the non-smoker group (P = 0.022), and between the cannabis users with more than 12 years of study and the non-smoker group (P = 0.008). A significantly lower performance in the Rapid Visual Information Processing (Mean latency, Probability of hit, Total hits, Total misses, Correct rejections) was found in the cannabis users with less than 12 years of study compared with the non-user group.ConclusionIn our population, chronic cannabis users presented divided and sustained attention and working memory disorders. Rapid Visual Information Processing performance may be influenced by education level in cannabis smokers. 相似文献
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A. Quaderi 《Annales médico-psychologiques》2011,169(9):581-584
The change of the semantic memory in the Alzheimer's disease makes complex the understanding speech of patients. The very important lexical reduction in this disease does not allow to understand the sense of speech. These patients keep an intact phonological capacity. It will be separated of what is pronounced of the whole verbal exchange. The said is often qualified as semantic no sense. The questions of nurses and families to clarify the requests fail. The patient is only repeating his request. For example, the patients ask to see a dead person (her mother) or a requirement (take a taxi). The explicit, literal sense (denotation), does not any more allow to understand this phonological production. It is impossible to act for these pressing requests. For us, these words are full of sense but condensed. The concept of connotation (say it) allows to seize the wide sense of the intention. From clinical examples, we propose answers according to the connotation of what is pronounced. So, we determine a first method of care to understand the requests of these persons. 相似文献
19.
About 50 years ago, three discoveries marked the beginning of revolutions in biology and neurosciences; namely, the tri-dimensional structure of DNA, the action of temporal hippocampus in long-term episodic memory, and the proof of an innate neurological organization. Since then, subsequent work in these three fields has always made scientific improvements on the front page. It is time to evaluate consequences, not only in the field of rehabilitation, but also in renewed humanistic culture. DNA analysis drove to minimizing gene contents and to emphasizing the true construction process from the embryo in an activity-dependent development, with the result that there is no aspect of psychism at birth. Temporal hippocampal activity by the way of synaptic modifications gives a brand new light to what is long-term episodic memory. Innate cerebral organization specifies radical constructivism. 相似文献
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