A questionnaire measure of adult attachment anxiety correlates with frontal hemispheric asymmetry in sleep spindle activity.

"Declarations Conflict of interestOn behalf of all authors, the corresponding author states that there is no conflict of interest. Ethical approvalParticipants signed informed consent for the participation in the study according to the Declaration of Helsinki. The research protocol used in this study was approved by the ethical boards of the Semmelweis University. Conflict of interest On behalf of all authors, the corresponding author states that there is no conflict of interest."

"Funding Open access funding provided by Semmelweis University. The research was supported by the Károli Gáspár University of the Reformed Church in Hungary and the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-EGA-25 funding scheme."