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The neural and genetic correlates of satisfying sexual activity in heterosexual pair-bonds.

ABSTRACT: INTRODUCTION:In humans, satisfying sexual activity within a pair-bond plays a significant role in relationship quality and maintenance, beyond reproduction. However, the neural and genetic correlates for this basic species-supporting function, in response to a pair-bonded partner, are unknown. METHODS:We examined the neural correlates of oxytocin- (Oxtr rs53576) and vasopressin- (Avpr1a rs3) receptor genotypes with sexual satisfaction and frequency, among a group of individuals in pair-bonds (M relationship length = 4.1 years). Participants were scanned twice (with functional MRI), about 1-year apart, while viewing face images of their spouse and a familiar, neutral acquaintance. RESULTS:Sex satisfaction scores showed significant interactions with Oxtr and Avpr variants associated with social behaviors in a broad network of regions involved in reward and motivation (ventral tegmental area, substantia nigra [SN], and caudate), social bonding (ventral pallidum), emotion and memory (amygdala/hippocampus), hormone control (hypothalamus); and somatosensory and self-other processing (SII, frontal, and temporal lobe). Sexual frequency interactions also showed activations in the SN and paraventricular hypothalamus for Avpr, and the prefrontal cortex for Oxtr. CONCLUSIONS:Satisfying sexual activity in pair-bonds is associated with activation of subcortical structures that support basic motivational and physiological processes; as well as cortical regions that mediate complex thinking, empathy, and self-other processes highlighting the multifaceted role of sex in pair-bonds. Oxtr and Avpr gene variants may further amplify both basic and complex neural processes for pair-bond conservation and well-being.

SUBMITTER: Acevedo BP

PROVIDER: S-EPMC6576152 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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The neural and genetic correlates of satisfying sexual activity in heterosexual pair-bonds.

Acevedo Bianca P BP Poulin Michael J MJ Geher Glenn G Grafton Scott S Brown Lucy L LL

Brain and behavior 20190514 6

<h4>Introduction</h4>In humans, satisfying sexual activity within a pair-bond plays a significant role in relationship quality and maintenance, beyond reproduction. However, the neural and genetic correlates for this basic species-supporting function, in response to a pair-bonded partner, are unknown.<h4>Methods</h4>We examined the neural correlates of oxytocin- (Oxtr rs53576) and vasopressin- (Avpr1a rs3) receptor genotypes with sexual satisfaction and frequency, among a group of individuals in ...[more]

PMID: 31090198

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Project description:Background and objectivesSexual satisfaction is an important part of sexual health and overall well-being. A large number of older people continue to be sexually active, and many are satisfied with their sex life. However, little is known about whether sexual satisfaction differs according to sexual orientation. Therefore, the aim of the study was to investigate whether sexual satisfaction differs according to sexual orientation in later life.Research design and methodsThe German Ageing Survey is a nationally representative study of the German population aged 40+. In the third wave (2008), data on both sexual orientation (heterosexual, homosexual, bisexual, other) and sexual satisfaction (1-very dissatisfied to 5-very satisfied) were collected. Multiple regression analyses with sampling weights were performed (stratified by age: 40-64; 65+).ResultsWe included 4,856 individuals in our analysis (mean age 57.6 ± 11.6; 40-85 years, 50.4% were women, 92.3% (n = 4,483) were heterosexual, and 7.7% (n = 373) were sexual minority adults). In sum, 55.9% of heterosexual individuals and 52.3% of sexual minority adults were satisfied or very satisfied with their sex life. Multiple regression analysis showed that sexual orientation was not significantly associated with sexual satisfaction among both middle-aged (β = 0.07; p = .45) and older adults (β = 0.01; p = .87). Higher sexual satisfaction was associated with lower loneliness scores, partnership satisfaction, importance of sexuality and intimacy, and better health status.Discussion and implicationsOur analysis showed that sexual orientation was not significantly associated with sexual satisfaction among both middle-aged and older adults. Lower loneliness, better health status, and partnership satisfaction significantly contributed to higher sexual satisfaction. Approximately 45% of older individuals (aged 65 years and older), regardless of their sexual orientation, were still satisfied with their sex life.

Project description:Previous studies have demonstrated variable influences of sexual hormonal states on female brain activation and the necessity to control for these in neuroimaging studies. However, systematic investigations of these influences, particularly those of hormonal contraceptives as compared to the physiological menstrual cycle are scarce. In the present study, we investigated the hormonal modulation of neural correlates of erotic processing in a group of females under hormonal contraceptives (C group; N?=?12), and a different group of females (nC group; N?=?12) not taking contraceptives during their mid-follicular and mid-luteal phases of the cycle. We used functional magnetic resonance imaging to measure hemodynamic responses as an estimate of brain activation during three different experimental conditions of visual erotic stimulation: dynamic videos, static erotic pictures, and expectation of erotic pictures. Plasma estrogen and progesterone levels were assessed in all subjects. No strong hormonally modulating effect was detected upon more direct and explicit stimulation (viewing of videos or pictures) with significant activations in cortical and subcortical brain regions previously linked to erotic stimulation consistent across hormonal levels and stimulation type. Upon less direct and less explicit stimulation (expectation), activation patterns varied between the different hormonal conditions with various, predominantly frontal brain regions showing significant within- or between-group differences. Activation in the precentral gyrus during the follicular phase in the nC group was found elevated compared to the C group and positively correlated with estrogen levels. From the results we conclude that effects of hormonal influences on brain activation during erotic stimulation are weak if stimulation is direct and explicit but that female sexual hormones may modulate more subtle aspects of sexual arousal and behaviour as involved in sexual expectation. Results may provide a basis for future imaging studies on sexual processing in females, especially in the context of less explicit erotic stimulation.

Project description:Happiness is regarded as one of the most fundamental human goals. Given recent reports that positive feelings are contagious (e.g., the presence of a happy person enhances others' happiness) because of the human ability to empathize (i.e., sharing emotions), empathic ability may be a key factor in increasing one's own subjective level of happiness. Based on previous studies indicating that a single nucleotide polymorphism in the serotonin 2A receptor gene [HTR2A rs6311 guanine (G) vs. adenine (A)] is associated with sensitivity to emotional stimuli and several mental disorders such as depression, we predicted that the polymorphism might be associated with the effect of sharing happiness. To elucidate the neural and genetic correlates of the effect of sharing happiness, we first performed functional magnetic resonance imaging (fMRI) during a "happy feelings" evocation task (emotional event imagination task), during which we manipulated the valence of the imagined event (positive, neutral, or negative), as well as the presence of a friend experiencing a positive-valence event (presence or absence). We recruited young adult women for this fMRI study because empathic ability may be higher in women than in men. Participants felt happier (p < 0.01) and the mentalizing/theory-of-mind network, which spans the medial prefrontal cortex, temporoparietal junction, temporal poles, and precuneus, was significantly more active (p < 0.05) in the presence condition than in the absence condition regardless of event valence. Moreover, participants with the GG (p < 0.01) and AG (p < 0.05) genotypes of HTR2A experienced happier feelings as well as greater activation of a part of the mentalizing/theory-of-mind network (p < 0.05) during empathy for happiness (neutral/presence condition) than those with the AA genotype. In a follow-up study with a vignette-based questionnaire conducted in a relatively large sample, male and female participants were presented with the same imagined events wherein their valence and the presence of a friend were manipulated. Results showed genetic differences in happiness-related empathy regardless of sex (p < 0.05). Findings suggest that HTR2A polymorphisms are associated with the effect of sharing happiness by modulating the activity of the mentalizing/theory-of-mind network.

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The neural and genetic correlates of satisfying sexual activity in heterosexual pair-bonds.

Publications

The neural and genetic correlates of satisfying sexual activity in heterosexual pair-bonds.

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