* Disrupted effective connectivity between the amygdala and orbitofrontal cortex in social anxiety disorder during emotion discrimination revealed by dynamic causal modeling for FMRI.
- Social anxiety disorder (SAD) is characterized by over-reactivity of fear-related circuits in social or performance situations and associated with marked social impairment. We used dynamic causal modeling (DCM), a method to evaluate effective connectivity, to test our hypothesis that SAD patients would exhibit dysfunctions in the amygdala-prefrontal emotion regulation network. Thirteen unmedicated SAD patients and 13 matched healthy controls performed a series of facial emotion and object discrimination tasks while undergoing fMRI. The emotion-processing network was identified by a task-related contrast and motivated the selection of the right amygdala, OFC, and DLPFC for DCM analysis. Bayesian model averaging for DCM revealed abnormal connectivity between the OFC and the amygdala in SAD patients. In healthy controls, this network represents a negative feedback loop. In patients, however, positive connectivity from OFC to amygdala was observed, indicating an excitatory connection. As we did not observe a group difference of the modulatory influence of the FACE condition on the OFC to amygdala connection, we assume a context-independent reduction of prefrontal control over amygdalar activation in SAD patients. Using DCM, it was possible to highlight not only the neuronal dysfunction of isolated brain regions, but also the dysbalance of a distributed functional network.
=>模型, 作る, 形に表わす, 模範, モデル, 型, 模型の, 模範となる, かたどる, 手本, モデルをする,
手本となる
Overview of noun model
The noun model has 9 senses (first 7 from tagged texts)
1. (19) model, theoretical account, framework -- (a hypothetical description of a complex entity or
process; "the computer program was based on a model of the circulatory and respiratory systems")
2. (11) model -- (a type of product; "his car was an old model")
3. (6) model, poser -- (a person who poses for a photographer or painter or sculptor; "the president
didn't have time to be a model so the artist worked from photos")
4. (4) model, simulation -- (representation of something (sometimes on a smaller scale))
5. (3) exemplar, example, model, good example -- (something to be imitated; "an exemplar of
success"; "a model of clarity"; "he is the very model of a modern major general")
6. (1) model, role model -- (someone worthy of imitation; "every child needs a role model")
7. (1) model, example -- (a representative form or pattern; "I profited from his example")
8. mannequin, manikin, mannikin, manakin, fashion model, model -- (a woman who wears clothes to
display fashions; "she was too fat to be a mannequin")
9. model, modelling, modeling -- (the act of representing something (usually on a smaller scale))
Overview of verb model
The verb model has 6 senses (first 2 from tagged texts)
1. (1) model, pattern -- (plan or create according to a model or models)
2. (1) model, mold, mould -- (form in clay, wax, etc; "model a head with clay")
3. model, pose, sit, posture -- (assume a posture as for artistic purposes; "We don't know the woman
who posed for Leonardo so often")
4. model -- (display (clothes) as a mannequin; "model the latest fashion")
5. model, simulate -- (create a representation or model of; "The pilots are trained in conditions
simulating high-altitude flights")
6. model, mock up -- (construct a model of; "model an airplane")
Overview of adj model
The adj model has 1 sense (first 1 from tagged texts)
1. (1) exemplary, model -- (worthy of imitation; "exemplary behavior"; "model citizens")
--- WordNet end ---