Does exercise increase or decrease pain? Central mechanisms underlying these two phenomena

Hiv/aids: Does It Increase or Decrease Growth in Africa?

Infectious diseases matter greatly for Africa. Cross-country regressions for the 1990-97 period suggest that HIV/AIDS has reduced the rate of growth of Africa’s per capita income by 0.7 percentage points per year. For those African countries affected by malaria, growth was further lowered by 0.3 percentage points per year. Such reduction is large when compared with the historical growth of 0.4%...

Does natural selection increase or decrease variability at linked Loci.

Does self - consciousness increase or decrease priming effects ? It depends

Self-consciousness has been shown to both increase and decrease the magnitude of prime-to-behavior effects. In this paper, we decouple the facets of self-consciousness into internal state awareness and self-reflectiveness and show that self-consciousness can be associated with multiple influences on automatic behavior. Specifically, we conducted an experiment demonstrating that increased intern...

Two of These or Two of Those?

Symmetrically dividing neuroepithelial cells may produce two daughters that are both proliferating or both postmitotic, as highlighted by Zigman et al. in this issue of Neuron and Sanada and Tsai in a recent issue of Cell. Here, I will attempt to offer a simple explanation why these results may be so different.

How does caffeine increase exercise capacity but decrease myocardial flow reserve?

My fellow authors and I appreciate the comments expressed in Dr. Horvath’s letter, which largely claim that the sole reason for the negative results demonstrated in our study (1) relates to procedural differences between surgical versus percutaneous transmyocardial laser revascularization (TMR). Although we acknowledged in our study that full-thickness transmyocardial laser channels at surgery ...