Task-invariant anterior-to-posterior large-scale phase gradients of electrocorticogram oscillations during picture naming and wrist extension.

ABSTRACT: Electrocorticogram (ECoG) recordings during rest have shown that theta and alpha oscillations on the cortical surface form "cortical traveling waves" across large-scale brain networks, known as phase gradients. Theoretically, these large-scale phase gradients are thought to contribute to asymmetric coupling among cortical regions. During cognitive tasks, such large-scale gradients presumably support flexible information transfer between task-related cortices; however, this has not been extensively evaluated. Here, we examined the large-scale phase gradients of ECoG theta-alpha (7 Hz) oscillations during picture naming and wrist extension tasks. Notably, large-scale anterior-posterior phase gradients that spontaneously appeared from the anterior temporal lobe (ATL) to posterior regions were

SUBMITTER: Sato N 

PROVIDER: S-EPMC12824183 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature