The exclusion criteria for the CID patients and HCs were as follows: (1) clinical evidence of other sleep disorders, such as restless legs syndrome, narcolepsy, or obstructive sleep apnea; (2) abnormal sleep-wake rhythms determined by sleep-wake cycles of sleep (such as day and night alternating work); (3) severe general medical disorders, including diabetes, hypertension, cerebrovascular disease, heart diseases, or respiratory diseases; (4) other neurological disease, eg, traumatic head injury, local brain lesions, epilepsy, neurodegenerative or psychiatric diseases, including anxiety (Hamilton Anxiety Scale29), depression (Hamilton Depression Scale35), psychosis, or illicit alcohol or drug abuse; (5) MRI contraindications, such as metallic implants, claustrophobia or devices in the body; (6) Epworth sleepiness scale show doze off or fall asleep in the fMRI scanning; and (7) MRI **data** quality that did not meet the requirements, which included head movement in the rs-fMRI **data** that was less than 2 mm of translation along any axis and less than 2° of angular rotation along any axis.