Background: Differences in emotion processing during Major Depressive Disorder (MDD) have not been well explored as a potential explanation for age and gender disparities in rates of depression and depressive symptoms. Early studies by our group demonstrated that those with MDD underperform in emotion processing of faces, although recently we showed a selective decrement in young women with MDD...

This study determined whether age-related mechanisms can increase fatigue of arm muscles during maximal velocity dynamic contractions, as it occurs in the lower limb. We compared elbow flexor fatigue of young (n=10, 20.8±2.7 years) and old men (n=16, 73.8±6.1 years) during and in recovery from a dynamic and an isometric postural fatiguing task. Each task was maintained until failure while suppo...

Background Background: The fatty acid composition of the sperm membrane changes drastically during spermatogenesis and may be key to its function. Previous data has shown that intake of long chain poly-unsaturated fatty acids can change the fatty acid composition of tissues, including testes and sperm. However, whether these changes in composition translate into changes in semen quality or male...

PURPOSE To determine the prevalence and correlates of sexual coercion in young adults in Lima, Peru. METHODS Lifetime sexual coercion and that at first sexual experience were studied in 629 sexually active young people, drawn from representative samples of 611 adolescents and 607 young adults. RESULTS Almost half of the young women and a quarter of the young men in the study reported sexual...

Although testosterone levels and muscle mass decline with age, many older men have serum testosterone level in the normal range, leading to speculation about whether older men are less sensitive to testosterone. We determined the responsiveness of androgen-dependent outcomes to graded testosterone doses in older men and compared it to that in young men. The participants in this randomized, doub...

the study was carried out on 1300 in patients in isfahan medical school teaching hospitals during the last ten years. 1) 13.6% of patients complained pf pericardial pains but nothing wrong with their hearts. 2) more false pericardial pains were seen among young patients rather than c.h.d. in addition to these more false precardial pains among women with comparing to men. 3) the severity of c.h....

BACKGROUND Physiological responses to exercise of moderate intensity and duration among aged compared to young adults have yet to be clearly defined. Further, the effects of aging on the rate and effectiveness of postexercise recovery are unknown. METHODS Here, selected physiological responses during and following exercise of the same relative intensity were examined in untrained young and ag...

Participation in the “honor culture” of poor black inner cities puts young men on constant alert for challenges to their reputations. Hypothetically, this vigilance raises their testosterone (T), which in turn facilitates dominance contests that may end violently. One prior study reports the predicted hormonal pattern including higher T among young black men with low education, compared to youn...

According to the mitochondrial theory of aging, an age-related increase in oxidative stress is responsible for cellular damage and ultimately cell death. Despite compelling evidence that supports the mitochondrial theory of aging in some tissues, data regarding aging skeletal muscle are inconsistent. We collected resting muscle biopsies from the vastus lateralis, and 24 h urine samples from, yo...