Dysfunctional beliefs and attitudes about sleep are associated with regional homogeneity of left inferior occipital gyrus in primary insomnia patients: A preliminary resting state functional magnetic resonance imaging study

•To explore the neural mechanisms of sleep beliefs and attitudes in primary insomnia (PI) patients based on rsfMRI.•PI patients showed decreased ReHo values in the left cerebellar gyrus, left inferior occipital gyrus (IOG) and left amygdala compared with those of NC.•ReHo values in the left IOG were negatively correlated with scores for “worry/helplessness about sleep”in PI patients.