Default Mode Network
1. 组成
Functional hubs: Information regarding the self
- Posterior cingulate cortex (PCC) & precuneus: Combines bottom-up (not controlled) attention with information from memory and perception. The ventral (lower) part of PCC activates in all tasks which involve the DMN including those related to the self, related to others, remembering the past, thinking about future, and processing concepts plus spatial navigation. The dorsal (upper) part of PCC involves involuntary awareness and arousal. The precuneus is involved in visual, sensorimotor, and attentional information.
- Medial prefrontal cortex (mPFC): Decisions about self processing

默认模式网络(DMN)主要由功能中心组成,包括涉及自我信息的后扣带回皮质和前扣带回皮质,参与决策和情感处理。DMN在休息状态下通过后扣带回皮质作为种子定义,并在外部导向任务中被抑制。它与注意力网络呈负相关,且在阿尔茨海默病和自闭症谱系障碍中可能失调。
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