ArticleCommunications biology2026
Frequency-specific cortical subnetworks support fast human swallowing.
Article in Communications biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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10 authors.
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Abstract
Fast, highly constrained sensorimotor acts require rapid coordination of distributed cortical systems on subsecond timescales. Here, we used source-resolved magnetoencephalography to characterise time-locked cortical connectivity during voluntary swallowing in 74 healthy adults. Cluster-based network statistics revealed focal swallowing-related connectivity changes confined to anatomically selective subnetworks. Undirected phase-lagged connectivity identified theta- and low-gamma weighted phase lag index (wPLI) effects involving somatosensory, motor, supramarginal, and insular regions. Directed connectivity revealed sparse high-gamma phase slope index (PSI) subnetworks centred on the primary somatosensory cortex and anterior insula. Time-window analyses demonstrated temporally evolving low-gamma interactions between posterior parietal and insular regions, while laterality analyses showed rightward theta-band directed asymmetries during later swallowing phases. In contrast, global graph-theoretical metrics and node-level hub measures remained largely stable after correction for multiple comparisons. These findings indicate that voluntary swallowing is supported by focal, frequency-specific, and temporally structured cortical interactions rather than broad global network reconfiguration.
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