| 词汇 | example_english_limbic |
| 释义 | Examples of limbicThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. There are remarkable differences between these strains in oxytocin and vasopressin and their receptors in a variety of limbic and other structures. Relevant circuitry again interconnects processing systems with the orbital frontal, limbic (amygdala and hypothalamus), and brainstem (periaqueductal gray) regions. Intracerebroventricular corticotropin-releasing factor increases limbic glucose metabolism and has social context-dependent behavioral effects in nonhuman primates. Studies have also evaluated another limbic structure, the hippocampus, which is implicated in working memory for emotional events. We assume, but have not proven, that these four groups of children inherit different profiles of limbic excitability which are based on different neurochemistries. Adolescence and early adulthood are associated with continuing myelination of association cortex and limbic cortex, including the hippocampus. He suggested that increased vivacity and frequency of dreaming was associated with anterior limbic lesions while recurring nightmares are associated with temporal seizures. The initiation of maternal behavior thus involves specific neural circuitry; and with pregnancy, structural and molecular changes occur in specific limbic, hypothalamic, and midbrain regions. Other mammals have only rigid, species-specific, limbic vocalizations. Resilience would be increased by processes that restore prefrontal cortex and limbic cortex function. The disease subsequently spreads from the limbic stage to the neocortex. The processing of facial emotion involves a distributed network of limbic and paralimbic brain structures. Information can thus be channeled from limbic to cognitive and to motor circuits at the subcortical level, allowing for appropriate responses to environmental cues. Chaotic behavior within the excitatory and inhibitory limbic circuits is thus expressed in sudden psychobiological state transitions. Failure in plasticity is considered to be an agerelated phenomenon, to which the limbic and paralimbic cortices are particularly vulnerable. Limbic abnormalities in affective processing by criminal psychopaths as revealed by functional magnetic resonance imaging. Stress and the developing limbic - hypothalamic - pituitary - adrenal axis. After two or three seizures exhibiting features of stage 5, typical limbic status epilepticus of long duration can be observed. Antidepressant medications appear to have exerted ' bottom-up ' effects by disengaging ventral frontal and limbic regions. The use of such general descriptors ' limbic ' and ' frontal ' should also be viewed with caution, given the considerable structural and functional heterogeneity of these regions. Reduced volume of limbic system affiliated basal ganglia in mood disorders. At the limbic core there emerges a general representation of the significance of an event, often in relation to a bodily need. In addition, the wide difference in affective tone between individual dreams must reflect differential activation of limbic circuits subserving different emotional states. During the early stages of the infection, clinical symptoms include persistent limbic pain and pruritus at the bite site and paraesthesiae. Fear conditioning is modulated by the amygdala complex of the limbic system. We will focus on coordination within the cortex but assume that it is also relevant to limbic, striatal, and thalamic functions. The unusual pattern of hyperplasia in the frontal cerebral cortex and hypoplasia in the limbic structures and cerebellum found in autism suggest such failure. Analysis of the limbic and neocortical representations for interpersonal reasoning suggests there are important contributions from visceral, affective, and somatic and cognitive levels. In primates, early deprivation appears to affect development of the limbic- cortical pathways involved in regulating neuroendocrine and behavioral responses to threat0 challenge. The limbic system (limbic meaning "border") contains a number of structures involved in the regulation of states of arousal and emotion. The role of limbic and hypothalamic corticotropin-releasing factor in behavioral responses to stress. Other than a limbic factor, covariation among brain divisions related to brain size has apparently rarely been pried apart in any substantial way. The second was systemspecific coordination as we described for the limbic system, produced by changed patterns of neurogenesis in specific species. The limbic circuit projects primarily to the cingulate and orbitofrontal cortices, which are known to be involved with the perception and regulation of emotion. Neurocircuits comprising limbic, striato-pallidal and thalamo-cortical brain areas are assumed to be involved in the pathophysiology of mood disorders. Male-to-female transsexuals have female neuron numbers in a limbic nucleus. In two studies examining patients with phobias, a reduction in limbic or paralimbic activity was observed following treatment, again consistent with the hypothesized pathophysiology. Of particular interest was the effect of treatment on activity in the amygdala and other limbic structures. A study of neural interactions within the limbic system using partial coherence and direct transfer functions analysis. Limbic circuitry in patients with autism spectrum disorders studied with positron emission tomography and magnetic resonance imaging. Several recent findings also suggest the importance of medio-frontal, limbic-associated cortical areas to dreaming. The isocortex, unlike the limbic system, is not distributed spatially, and the problem of its coordination is less complicated. The limbic factor is most often associated with the loss of olfactory ability in principally diurnal primates, but not with any direct behavioral advantage. If the process started with the visual images, there should be nothing for the frontal-limbic structures to evaluate (and therefore no dreams) in such cases. Fourth, the thalamocortical tracts connecting the mediodorsal nucleus of the thalamus to the prefrontal cortex, which were targeted by leucotomy, integrate many "upstream" limbic inputs. Evidence for segregated corticocortical networks linking sensory and limbic areas with the frontal lobe. The neural substrates mediating these interactions include the rostral limbic cortex of the frontal lobe. Activation of these limbic regions presumably interrupts previous ongoing behavior via circuity linking limbic and prefrontal cortex. The limbic circuits receive simple perceptual inputs from the thalamus, as well as more complex perceptual and conceptual information from the cortex. Preventive interventions geared toward decreasing limbic hyperactivity might serve to prevent mood episodes and the development of full mania. Experience with highly emotional events may lead to an overactivation of the limbic system, which may render the individual more sensitive to emotional material. In addition to the widespread cortical abnormalities noted in autism, several laboratories also reported abnormalities in subcortical structures, including the limbic system. Further, this cortical system is linked to the limbic system by means of an anterior sector of the human insular lobe. Increasing sadness causes increased activation in ' limbic ' fronto-striato-thalamic systems in normal comparison subjects. Increased limbic blood flow and total sleep deprivation in major depression with melancholia. Modulating emotional responses : effects of a neocortical network on the limbic system. A small opening was made through the conjunctival tissue and the sclera exposed behind the limbic corneal junction. The hippocampus is a part of the limbic system which is of great importance for declarative - primarily episodic (biographic) - memory functions. On such basis, the striatum can be subdivided into sensorimotor, associative and limbic territories. Limbic seizures produced by pilocarpine in rats: behavioural, electroencephalographic and neuropathological study. The recognition of facial emotion is dependent on limbic and paralimbic brain structures that may function abnormally in mood disorders. They conclude that limbic structures are at least a necessary component for the improvement of a skill for mental rotation (p. 5). Compared to other mammals, neurodevelopmental events occur systematically earlier for limbic structures in primates and later for isocortical structures. Lower values occurred primarily in comparisons involving olfactory bulb and, to a lesser extent, limbic structures. Limbic-dependent recognition memory in monkeys develops early in infancy. The noradrenergic system has projections throughout the limbic and corticothalamic system with wide distribution of - and -adrenergic receptors. Another involves the mesolimbic and mesostriatal dopamine systems that also have extensive cortical projections from the striatum and limbic region including the amygdala. In contrast, different attachment histories indelibly influence the dual limbic components of the "organized" forms of insecure attachments. Limbic circuitry in patients with autism spectrum disorders studied with positron emission tomography and magnetic resonace imaging. Perhaps a little clarification is required, because it was not my intention to ignore the derived limbic contributions to the social brain. Second, various parts of the limbic system, including the amygdala, are being driven unusually strongly by the imagery. Damage to limbic structures leads to a failure to learn new information and to recall past experience (amnesia). Within the patient group, grey matter volume in limbic and subcortical regions of deficit was negatively correlated with tuber count. In this case, the burst discharge might be associated with theta-like activity of the limbic system. Thalamic afferents to the limbic cortex in the cat studied with the method of retrograde axonal transport of horseradish peroxidase. In contrast, the axons of limbic neurons remained unbranched, at least until they reached the thalamus. Descending motor pathways and the spinal motor system: limbic and non-limbic components. A review of systems and networks of the limbic forebrain/limbic midbrain. Limbic hyperactivation during processing of neutral facial expressions in children with bipolar disorder. The anterior variant of global anoneria results from deep medial frontal damage resulting in the disconnection of the mediobasal frontal cortex from the brain stem and diencephalic limbic regions. The organization of cor tical afferents to the rostral limbic sector of the rat thalamic reticular nucleus. Evidence of dysfunction of a prefrontal-limbic network in schizophrenia : a magnetic resonance imaging and regional cerebral blood flow study of discordant monozygotic twins. Neurobiology of the cingulate cortex and limbic thalamus pp. 314-344!. Finally, animal studies are beginning to note the impact of early parental care on the development of prefrontal systems, in addition to their earlier focus on limbic- hypothalamic functions. Such maps are believed to involve cortical sensory and motor maps as well as the brain regions with which these cortical areas interact, such as limbic regions. Selective retention of corticosterone by limbic structures in rat brain. Uptake of corticosterone by rat brain and its concentration by certain limbic structures. On the other hand, insecure-avoidant attachment histories experientially shape an expansion of the inhibitory lateral tegmental and excessive parcellation of the excitatory ventral tegmental limbic circuits. Further, the atypical frontal activation may reflect compensatory neural function; namely, reorganization of cognitive processes in frontal/limbic areas in the presence of aberrant development in the posterior regions. Structural brain magnetic resonance imaging of limbic and thalamic volumes in pediatric bipolar disorder. Common physiopathology for sensory, motor and limbic positive symptoms. The limbic thalamus: structure, intrinsic organization, and connections. Low-threshold calcium spike bursts in the human thalamus: common physiopathology for sensory, motor and limbic positive symptoms. Limbic connections of the orbital and medial prefrontal cortex in macaque monkeys. The midline thalamus: alterations and a potential role in limbic epilepsy. The centre median and parafascicular thalamic nuclei project respectively to the sensorimotor and associative-limbic striatal territories in the squirrel monkey. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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