Misperception Among Gay Men of the Risk for AIDS Associated with Their Sexual Behavior1

Until a vaccine against AIDS is developed, the most effective strategy for preventing the spread of the disease among gay men, the largest risk group, is to persuade them to abstain from particular kinds of sexual practices implicated in the transmission of the AIDS virus. Motivation to comply with risk-reduction guidelines, however, is dependent in part on a realistic appraisal of the degree of risk associated with one's sexual practices. Data are presented from 160 asymptomatic gay men. Their subjective assessment of the riskiness of their sexual behavior is compared to an objective assessment of the riskiness of their sexual practices. Factors associated with a tendency to underestimate the riskiness of one's practices are examined. Finally, the implications of the findings for public health education efforts among gay men are discussed.     

FEMINISM AND WOMEN'S FRIENDSHIPS

The ideology of "sisterhood" within the feminist movement suggests that feminists' and nonfeminists' same–sex friendships would differ profoundly. This assumption was tested by examining the friendships of 45 heterosexual nonfeminists, 43 heterosexual feminists, and 38 lesbian feminists from a large midwestern city. Participants ranged in age from 19 to 46. Using objective measures, differences were found between feminists and nonfeminists for some structural dimensions of friendship, including number of cross–generational friendships, degree of equality, and amount of privacy preferred with a best friend. Lesbian feminists preferred more privacy with their friends than nonfeminists, but rated their friends as lower on relationship quality and degree of equality than heterosexual feminists and nonfeminists. The three groups did not differ on the affective content of friendship, including liking, loving, satisfaction and commitment. However, feminists subjectively perceived their feminism as having contributed to both structural and affective changes in their friendships.     

Neuroanatomical correlates of performance in a state‐wide test of math achievement

The development of math skills is a critical component of early education and a strong indicator of later school and economic success. Recent research utilizing population‐normed, standardized measures of math achievement suggest that structural and functional integrity of parietal regions, especially the intraparietal sulcus, are closely related to the development of math skills. However, it is unknown how these findings relate to in‐school math learning. The present study is the first to address this issue by investigating the relationship between regional differences in grey matter (GM) volume and performance in grade‐level mathematics as measured by a state‐wide, school‐based test of math achievement (TCAP math) in children from 3rd to 8th grade. Results show that increased GM volume in the bilateral hippocampal formation and the right inferior frontal gyrus, regions associated with learning and memory, is associated with higher TCAP math scores. Secondary analyses revealed that GM volume in the left angular gyrus had a stronger relationship to TCAP math in grades 3–4 than in grades 5–8 while the relationship between GM volume in the left inferior frontal gyrus and TCAP math was stronger for grades 5–8. These results suggest that the neuroanatomical architecture related to in‐school math achievement differs from that related to math achievement measured by standardized tests, and that the most related neural structures differ as a function of grade level. We suggest, therefore, that the use of school‐relevant outcome measures is critical if neuroscience is to bridge the gap to education.     

Adrenal gland responses to lipopolysaccharide after stress and ethanol administration in male rats

All forms of stress, including restraint stress (RS) and lipopolysaccharide (LPS) administration, activate the hypothalamic-pituitary-adrenal (HPA) axis. LPS binds to a recognition protein (CD14) and toll-like receptor 2/4 in different cells and tissues, including the adrenal gland, to induce the production of cytokines and cause upregulation of cyclooxygenase and nitric oxide synthase (NOS) enzymes. Acute ethanol exposure activates the HPA axis, but in some conditions prolonged administration can dampen this activation as well as decrease the inflammatory responses to LPS. Therefore, this study was designed to evaluate the adrenal response to a challenge dose of LPS (50 μg/kg) injected i.p., after submitting male rats to RS, twice a day (2 h each time) for 5 days and/or ethanol administration (3 g/kg) by gavage also for 5 days, twice daily. At the end of the experiment, plasma corticosterone concentrations and adrenal gland content of prostaglandin E (PGE) and NOS activity were measured as stress mediators. The results showed that repetitive ethanol administration attenuated the adrenal stress response to LPS challenge alone and after RS, by preventing the increase in plasma corticosterone concentrations and by decreasing the PGE content and NOS activity in the adrenal gland. Therefore, we conclude that moderate alcohol consumption could attenuate the effects of psychophysical stress and impair an inflammatory response.     

Contextualizing the History of Yoga in Geoffrey Samuel’s The Origins of Yoga and Tantra: A Review Symposium

International Journal of Hindu Studies -