This study identifies an SD-related cortical weight map predominantly localized to the occipital cortex and visual/ventral attention networks, and characterizes its functional, directional, and metabolic associations, offering a systems-level perspective on the neural vulnerability underlying cognitive impairment after sleep loss.
Key Findings
Methods
A sleep deprivation-related cortical weight map (SD-CWM) was generated using lesion network mapping applied to connectome data from 1000 healthy individuals, based on meta-analytic seeds.
Meta-analytic seeds were used as the basis for lesion network mapping
Connectome data from 1000 healthy individuals was used to generate the SD-CWM
The SD-CWM represents a large-scale cortical architecture associated with sleep deprivation effects
This approach integrates network-level connectivity to identify cortical regions vulnerable to sleep loss
Results
After 24-hour acute sleep deprivation, alterations in both resting-state and task-evoked brain activities within the SD-CWM were associated with memory performance decline, with resting-state changes showing stronger associations.
Thirty participants completed a 24-hour acute SD protocol
Both resting-state and memory-task-evoked brain activities were measured under rested wakefulness (RW) and SD conditions
Memory performance was measured under both RW and SD conditions
Resting-state activity changes showed stronger associations with memory performance decline than task-evoked activity changes
Results
The SD-CWM was predominantly localized to the occipital cortex and encompassed the visual and ventral attention networks.
The SD-CWM showed predominant localization in the occipital cortex
The map encompassed the visual network and the ventral attention network
The SD-CWM showed spatial correspondence with nine neurotransmitter receptors
These nine neurotransmitter receptors also tracked individual differences in resting-state changes after SD
Results
Granger causality analysis revealed a shift in cortex-subcortex directional influences from cortex-to-subcortex patterns under rested wakefulness to subcortex-to-cortex patterns under sleep deprivation, centered on the caudal temporal thalamus.
Under rested wakefulness (RW), Granger causality indicated cortex-to-subcortex directional influences between the SD-CWM and subcortical nuclei
Under sleep deprivation, there was a shift toward subcortex-to-cortex directional patterns
The directional shift was centered on the caudal temporal thalamus
This finding suggests sleep deprivation alters the hierarchical direction of information flow between cortical and subcortical structures
Results
Four metabolites were associated with resting-state changes within the SD-CWM, with cortical activity alterations showing stronger associations with metabolic variation than subcortical activity.
Untargeted metabolomics was performed under both rested wakefulness and sleep deprivation conditions in the 30 participants
Four specific metabolites were identified as associated with resting-state activity changes within the SD-CWM
Cortical activity alterations showed stronger associations with metabolic variation compared to subcortical activity alterations
This finding links neuroimaging changes to biochemical/metabolic alterations induced by sleep deprivation
Results
The SD-CWM showed spatial correspondence with nine neurotransmitter receptors that also tracked individual differences in resting-state changes after sleep deprivation.
Nine neurotransmitter receptors demonstrated spatial correspondence with the SD-CWM
These same receptors tracked individual differences in resting-state changes induced by SD
This neurotransmitter mapping provides insight into the pharmacological architecture underlying SD-related cortical vulnerability
The finding connects large-scale network changes to specific receptor-level neurotransmission systems
What This Means
This research suggests that sleep deprivation has specific, mappable effects on the brain's cortical organization, particularly in the visual and attention-related regions at the back of the brain (occipital cortex). Using a combination of brain connectivity data from 1,000 healthy people and direct measurements from 30 participants who stayed awake for 24 hours, the researchers created a 'sleep deprivation cortical weight map' that identifies which brain areas are most vulnerable to the effects of losing sleep. They found that changes in these brain areas — especially during rest rather than active tasks — were linked to worse memory performance after sleep deprivation.
The study also found that sleep deprivation changes the way the brain's cortex and deeper subcortical structures communicate with each other. Normally, signals flow from the cortex down to subcortical structures, but after sleep deprivation this pattern reverses, with subcortical regions (particularly a part of the thalamus) driving signals upward to the cortex. Additionally, four specific metabolites in the body were linked to brain activity changes, and the cortex showed stronger metabolic associations than deeper brain structures, connecting brain-level changes to broader biochemical effects of sleep loss.
This research matters because it provides a comprehensive, systems-level picture of how sleep deprivation impairs the brain — linking network organization, chemical signaling (nine specific neurotransmitter receptors were implicated), directional brain communication, and metabolism all together. This kind of integrative mapping could eventually help identify who is most vulnerable to sleep loss and point toward potential targets for interventions to counteract the cognitive effects of insufficient sleep.
Wu K, Wu Z, Huo B, Song M, Jia H, Ning Y. (2026). Mapping the cortical architecture of sleep deprivation: insights from fMRI, neurotransmission, and metabolic activity.. NeuroImage. https://doi.org/10.1016/j.neuroimage.2026.121713