Deep Vascular Imaging in Wounds

When we’re wounded, our bodies rush to repair the damage. First, there’s a blood clot that forms quickly and acts as a temporary seal. Then follows the more gradual process of angiogenesis – the growth of new blood vessels to replace those that are injured. This image is of a wound healing on a mouse. It was captured … Continue reading

Scientists Clone Human Embryos To Make Stem Cells

Human cloning has been used to produce early embryos, marking a “significant step” for medicine, say US scientists. The cloned embryos were used as a source of stem cells, which can make new heart muscle, bone, brain tissue or any other type of cell in the body. Scientists say they have, for the first time, … Continue reading

Gate Control Theory of Pain

To explain why thoughts and emotions influence pain perception, Ronald Melzack and Patrick Wall proposed that a gating mechanism exists within the dorsal horn of the spinal cord. Small nerve fibers (pain receptors) and large nerve fibers (“normal” receptors) synapse on projection cells (P), which go up the spinothalamic tract to the brain, and inhibitory … Continue reading

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