Neuromodulatory Control and Language Recovery in Bilingual Aphasia: An Active Inference Approach.

Neuromodulatory Control and Language Recovery in Bilingual Aphasia: An Active Inference Approach.
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双语失语症中的神经调节控制和语言恢复:一种主动推断方法。

DOI:
10.3390/bs10100161
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发表时间:
2020-10-21
期刊:
Behavioral sciences (Basel, Switzerland)
影响因子:
--
通讯作者:
W Green D
W Green D
中科院分区:
其他
文献类型:
--
作者:
Sajid N;Friston KJ;Ekert JO;Price CJ;W Green D

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了解双语失语症的不同恢复模式的病因是一个理论上的挑战与治疗的影响。对完整语言网络的控制丧失提供了一个可以使用计算机模拟病变进行测试的简约起点。我们模拟了一个复杂的恢复模式(交替拮抗和矛盾的翻译),以测试的假设,从一个既定的分层控制模型,即失去控制是由神经调节资源的限制。我们使用主动(贝叶斯)推理来模拟感官精确度的选择性损失;即,对感觉原因的信心。这种硅片损伤改变了对任务相关状态的信念的精确性,包括适当的行动,并准确地再现了感兴趣的恢复模式。由于感觉精确度与乙酰胆碱释放有关,这些模拟支持了神经调节控制丧失可以解释这种非典型恢复模式的推测。我们讨论了其他恢复模式的相关性,这一发现。
Understanding the aetiology of the diverse recovery patterns in bilingual aphasia is a theoretical challenge with implications for treatment. Loss of control over intact language networks provides a parsimonious starting point that can be tested using in-silico lesions. We simulated a complex recovery pattern (alternate antagonism and paradoxical translation) to test the hypothesis—from an established hierarchical control model—that loss of control was mediated by constraints on neuromodulatory resources. We used active (Bayesian) inference to simulate a selective loss of sensory precision; i.e., confidence in the causes of sensations. This in-silico lesion altered the precision of beliefs about task relevant states, including appropriate actions, and reproduced exactly the recovery pattern of interest. As sensory precision has been linked to acetylcholine release, these simulations endorse the conjecture that loss of neuromodulatory control can explain this atypical recovery pattern. We discuss the relevance of this finding for other recovery patterns.
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