PMID- 29030069 OWN - NLM STAT- MEDLINE DCOM- 20190726 LR - 20190726 IS - 1090-2147 (Electronic) IS - 0278-2626 (Linking) VI - 131 DP - 2019 Apr TI - Sex differences and menstrual cycle effects in cognitive and sensory resting state networks. PG - 66-73 LID - S0278-2626(17)30183-5 [pii] LID - 10.1016/j.bandc.2017.09.003 [doi] AB - It has not yet been established if resting state (RS) connectivity reflects stable characteristics of the brain, or if it is modulated by the psychological and/or physiological state of the participant. Based on research demonstrating sex hormonal effects in task-related brain activity, the present study aimed to investigate corresponding differences in RS networks. RS functional Magnetic Resonance Imaging (RS fMRI) was conducted in women during three different menstrual cycle phases, while men underwent three repeated RS fMRI testing sessions. Independent component analysis was used to identify the default mode network (DMN) and an auditory RS network. For the DMN, RS connectivity was stable across testing sessions in men, but varied across the menstrual cycle in women. For the auditory network (AN), retest reliable sex difference was found. Although RS activity in the DMN has been interpreted as trait characteristic of functional brain organization, these findings suggest that RS activity in networks involving frontal areas might be less stable than in sensory-based networks and can dynamically fluctuate. This also implies that some of the previously reported effects of sex hormones on task-related activity might to some extent be mediated by cycle-related fluctuations in RS activity, especially when frontal areas are involved. CI - Copyright (c) 2017 Elsevier Inc. All rights reserved. FAU - Weis, Susanne AU - Weis S AD - Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Dusseldorf, Dusseldorf, Germany; Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Julich, Julich, Germany; Department of Psychology, Durham University, UK; Durham University Neuroimaging Centre (DUNIC), UK. Electronic address: S.Weis@fz-juelich.de. FAU - Hodgetts, Sophie AU - Hodgetts S AD - Department of Psychology, Durham University, UK; Durham University Neuroimaging Centre (DUNIC), UK. FAU - Hausmann, Markus AU - Hausmann M AD - Department of Psychology, Durham University, UK; Durham University Neuroimaging Centre (DUNIC), UK. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20171010 PL - United States TA - Brain Cogn JT - Brain and cognition JID - 8218014 RN - 4G7DS2Q64Y (Progesterone) RN - 4TI98Z838E (Estradiol) MH - Adolescent MH - Adult MH - Attention/physiology MH - Brain/*diagnostic imaging/physiology MH - Brain Mapping/methods MH - Cognition/*physiology MH - Estradiol/blood MH - Female MH - Humans MH - Magnetic Resonance Imaging/methods MH - Male MH - Menstrual Cycle/*physiology MH - Progesterone/blood MH - *Sex Characteristics MH - Young Adult OTO - NOTNLM OT - Default mode network OT - Resting state OT - Sex differences OT - Sex hormones OT - fMRI EDAT- 2017/10/17 06:00 MHDA- 2019/07/28 06:00 CRDT- 2017/10/15 06:00 PHST- 2017/04/28 00:00 [received] PHST- 2017/08/24 00:00 [revised] PHST- 2017/09/05 00:00 [accepted] PHST- 2017/10/17 06:00 [pubmed] PHST- 2019/07/28 06:00 [medline] PHST- 2017/10/15 06:00 [entrez] AID - S0278-2626(17)30183-5 [pii] AID - 10.1016/j.bandc.2017.09.003 [doi] PST - ppublish SO - Brain Cogn. 2019 Apr;131:66-73. doi: 10.1016/j.bandc.2017.09.003. Epub 2017 Oct 10.