If you've ever tried to tickle yourself, you may not have succeeded. This is due to your nervous system suppressing the expected sensation of your own actions, a mechanism known as tactile gating. Until now, this mechanism ...
The brain is perhaps the most sensitive organ with respect to changes in blood flow and oxygen supply. Even brief interruptions in capillary flow (or "stalling") can indicate acute neurological issues; evidence suggests that ...
Sep 13, 2023
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Dr. Brett Youngerman and researchers from the Columbia Comprehensive Epilepsy Center have led the largest multicenter series to date of magnetic resonance-guided laser interstitial thermal therapy (MRgLITT) recently published ...
Aug 31, 2023
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Optical-resolution photoacoustic microscopy is an up-and-coming biomedical imaging technique for studying a broad range of diseases, such as cancer, diabetes and stroke. But its insufficient sensitivity has been a longstanding ...
Aug 31, 2023
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Cardiovascular disease is the world's leading cause of death. According to the World Health Organization, 17.9 million people die every year due to cardiovascular diseases. For the prewarning and accurate treatment of cardiovascular ...
Aug 16, 2023
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Whether you got a tattoo on a whim or after much thought, that ink on your body is fairly permanent.
Aug 7, 2023
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Based on non-invasive, easy-to-manipulate near-infrared (NIR) laser irradiation, researchers from the Institute of Process Engineering (IPE) of the Chinese Academy of Sciences and the University of the Chinese Academy of ...
Aug 1, 2023
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Glaucoma, an eye disease that can cause irreversible blindness, is a major health concern worldwide. It is caused by a build-up of fluid in the eye, which leads to increased pressure inside the eye. This pressure can in turn ...
Jul 6, 2023
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Low-level laser therapy and associated photobiomodulation is the most effective of the known treatments for tinnitus, according to a study comparing the main therapies in current use, conducted by Brazilian scientists affiliated ...
Jun 21, 2023
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The pandemic and its aftermath have raised anxiety to new levels. But the roots of anxiety-related conditions, including obsessive-compulsive spectrum disorder (OCSD), are still unclear. In a new study, University of Utah ...
Jun 5, 2023
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A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.
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