Cortical activation and functional connectivity during a verbal fluency task in patients with chronic insomnia: A multi-channel NIRS study

Patients with chronic insomnia exhibit varying degrees of cognitive dysfunction. Functional connectivity of different brain regions contributes to the understanding of underlying cognitive processes in the cerebral cortex. However, this has not yet been studied in patients with chronic insomnia. This study aimed to elucidate the differences between brain activity patterns in patients with chronic insomnia and healthy controls (HCs) using a verbal fluency task (VFT).