Researchers from the Chinese Academy of Sciences have identified a new organizational principle within the default mode network (DMN) that explains how it supports both internal thoughts and external perceptions. The study reveals that the DMN is composed of distinct subregions acting as either senders or receivers of information, allowing the brain to flexibly shift between memory-driven thought and sensory perception.
Key findings include:
* Identification of receiver-like subregions that support information integration during perception through stronger connectivity with heteromodal association networks.
* Identification of sender-like subregions that guide memory-based behavior via coupling with sensorimotor systems.
* Evidence that these subdivisions correspond to specific cognitive modes, such as face recognition versus memory-guided decisions.
Key findings include:
* Identification of receiver-like subregions that support information integration during perception through stronger connectivity with heteromodal association networks.
* Identification of sender-like subregions that guide memory-based behavior via coupling with sensorimotor systems.
* Evidence that these subdivisions correspond to specific cognitive modes, such as face recognition versus memory-guided decisions.
Human high-order thalamic nuclei gate conscious perception through the thalamofrontal loop
Researchers investigated the neural basis of conscious perception using intracranial recordings in humans. They discovered that the intralaminar and medial thalamic nuclei (imTha) exhibit early and strong activity linked to consciousness, acting as a “gate” that drives information to the prefrontal cortex. This supports the idea that the thalamofrontal loop is essential for visual awareness and provides direct evidence for the thalamus’s role in the rapid emergence of conscious experience.
Researchers investigated the neural basis of conscious perception using intracranial recordings in humans. They discovered that the intralaminar and medial thalamic nuclei (imTha) exhibit early and strong activity linked to consciousness, acting as a “gate” that drives information to the prefrontal cortex. This supports the idea that the thalamofrontal loop is essential for visual awareness and provides direct evidence for the thalamus’s role in the rapid emergence of conscious experience.
A new study published in Science has identified the thalamus as a central player in how humans become consciously aware of visual information. Researchers discovered that specific thalamic regions activate earlier and more strongly during moments of visual awareness, suggesting they act as a gateway for conscious perception.
A new study suggests the thalamus plays a key role in regulating conscious perception, acting as a gateway between sensory signals and the cerebral cortex. Researchers used data from patients with pre-existing electrodes to observe brain activity during visual perception tasks.
