Testing a model of auditory hallucinations: the role of negative emotions and cognitive resources

ABSTRACT

Introduction: Models of auditory hallucinations (AH) state that AH arise through an interaction between negative emotions and limited available cognitive resources. However, this hypothesis has never been directly tested. Methods: A two-by-two factorial design was used to examine the effect of emotions (neutral VS negative) and available cognitive resources (high VS low) on the elicitation of false alarms in an auditory signal detection paradigm. One hundred and seventy four healthy participants were assigned to one of the four experimental conditions. While participants were listening to white noise, their emotional state was manipulated using affective pictures and the level of available cognitive resources was manipulated using a visual N-back task. Results: Results revealed significant interaction effects between emotions and cognitive resources on the number of false alarms. In particular, participants with fewer available cognitive resources and at the same time who were in a negative emotional state, tended to hear significantly more false alarms. In addition, the degree of certitude was significantly correlated with a higher degree of hallucination proneness. Conclusions: Such results are in agreement with models of AH and they provide new data for the understanding of the emotional and cognitive mechanisms that underpin AH.     

Environmental toxins and breast cancer on Long Island. I. Polycyclic aromatic hydrocarbon DNA adducts.

Polycyclic aromatic hydrocarbons (PAH) are potent mammary carcinogens in rodents, but their effect on breast cancer development in women is not clear. To examine whether currently measurable PAH damage to DNA increases breast cancer risk, a population-based case-control study was undertaken on Long Island, NY. Cases were women newly diagnosed with in situ and invasive breast cancer; controls were randomly selected women frequency matched to the age distribution of cases. Blood samples were donated by 1102 (73.0%) and 1141 (73.3%) of case and control respondents, respectively. Samples from 576 cases and 427 controls were assayed for PAH-DNA adducts using an ELISA. The geometric mean (and geometric SD) of the log-transformed levels of PAH-DNA adducts on a natural scale was slightly, but nonsignificantly, higher among cases [7.36 (7.29)] than among controls [6.21 (4.17); P = 0.51]. The age-adjusted odds ratio (OR) for breast cancer in relation to the highest quintile of adduct levels compared with the lowest was 1.51 [95% confidence interval (CI), 1.04-2.20], with little or no evidence of substantial confounding (corresponding multivariate-adjusted OR, 1.49; 95% CI, 1.00-2.21). There was no consistent elevation in risk with increasing adduct levels, nor was there a consistent association between adduct levels and two of the main sources of PAH, active or passive cigarette smoking or consumption of grilled and smoked foods. These data indicate that PAH-DNA adduct formation may influence breast cancer development, although the association does not appear to be dose dependent and may have a threshold effect.     

Dietary fat intake and risk for Parkinson's disease

Previous epidemiological studies have generated inconsistent results regarding the associations between dietary fat intakes and risk for Parkinson's disease (PD). We therefore prospectively examined these associations in the National Institutes of Health–American Association of Retired Persons (NIH‐AARP) Diet and Health Study. A 124‐item food frequency questionnaire was administered at baseline in1995 to 1996, and PD diagnosis was self‐reported at the follow‐up survey in 2004 to 2006. A total of 1,087 cases with a PD diagnosis between 2000 and 2006 and 299,617 controls were included in the analyses. Overall, intakes of fats and other macronutrients were not associated with PD risk. However, we found a weak positive association between n‐6 polyunsaturated fatty acids (PUFA) and the risk for PD. After adjusting for potential confounders, the odds ratio (OR) and 95% confidence interval (CI) between extreme quintiles of n‐6 PUFA intake was 1.23 (95% CI = 1.02‐1.49, P for trend = 0.02). A similar association was observed for the intake of linoleic acid. Results were similar among men and among women. Our study suggests that fat intake in general is not related to the risk for PD. The weak positive association between intake of n‐6 PUFA and PD risk needs further investigation. © 2014 International Parkinson and Movement Disorder Society     

Coronavirus Disease Model to Inform Transmission-Reducing Measures and Health System Preparedness,Australia

The ability of health systems to cope with coronavirus disease (COVID-19) cases is of major concern. In preparation, we used clinical pathway models to estimate healthcare requirements for COVID-19 patients in the context of broader public health measures in Australia. An age- and risk-stratified transmission model of COVID-19 demonstrated that an unmitigated epidemic would dramatically exceed the capacity of the health system of Australia over a prolonged period. Case isolation and contact quarantine alone are insufficient to constrain healthcare needs within feasible levels of expansion of health sector capacity. Overlaid social restrictions must be applied over the course of the epidemic to ensure systems do not become overwhelmed and essential health sector functions, including care of COVID-19 patients, can be maintained. Attention to the full pathway of clinical care is needed, along with ongoing strengthening of capacity.     

Management of Lobular Neoplasia

Purpose of Review

Lobular neoplasia (LN) is a well-established risk factor and non-obligate precursor for breast cancer. The clinical breast cancer risk assessment and management for these patients can be challenging.

Recent Findings

Numerous studies have confirmed that LN is a risk factor and non-obligate precursor for breast cancer. The molecular profile of LCIS is similar to invasive lobular carcinoma. Surgical excision is generally recommended after core biopsy, but there may be a subset of patients with LN who may be observed without surgery. The significant increase in breast cancer risk associated with this disease justifies close surveillance. Chemoprevention is beneficial but uptake remains a challenge.

Summary

This paper is a review of the historical and contemporary studies on the clinicopathologic characteristics of LN, the associated risk of breast cancer development, and current management of patients with lobular neoplasia.

     

Relationship Commitment, Perceived Equity, and Sexual Enjoyment Among Young Adults in the United States

Very little is known about how enjoyment of sexual behavior is linked to the relationship context of the behavior among young adults in the United States. To examine this association, multivariate logistic and ordered logistic regression analyses were conducted using data from Wave III of the National Longitudinal Study of Adolescent Health, collected when the participants were 18 to 26 years old (N = 2,970). Analyses explored the associations between four measures of sexual enjoyment and three measures of relationship context. Perceived equity was associated with sexual enjoyment, but the pattern of associations differed by gender. Perceiving oneself to be underbenefited was associated with less enjoyment for all four measures of sexual enjoyment among women, but for only one measure among men. Perceiving oneself to be overbenefited was associated with less enjoyment for three of the sexual enjoyment measures among men, but for only two among women. Most of these associations were no longer significant when subjective relationship commitment was added to the models. Among both young adult men and women, subjective relationship commitment was associated with all four measures of sexual enjoyment. In contrast, formal relationship status was not consistently associated with any of the sexual enjoyment measures. Young adults perceiving that they are in more-committed relationships enjoy their partnered sexual acts more, on average, than those in less-committed relationships. Anticipation of higher sexual enjoyment could be used by public health campaigns to motivate young adults to engage in fewer, more-committed sexual partnerships.