New imaging of patients with Alzheimer's demonstrates how a telltale protein spreads throughout the brain based on the phenotype of the disease, i.e., whether the condition is dominated by forgetfulness, or atrophy in a specific ...
A combined team of diabetes specialists from Eberhard Karls University Tübingen and Heinrich Heine University Düsseldorf, both in Germany, has found evidence that suggests brain sensitivity to insulin may be modulated by ...
Research led by the University of Texas Health Science Center, San Antonio, Texas, has looked into premature brain aging in individuals with type 1 diabetes.
A team of researchers affiliated with several institutions in China has found that people who engage in altruistic behaviors feel less pain than they otherwise would. In their paper published in Proceedings of the National ...
Two teams of researchers have independently published papers describing research conducted using the full set of data in the UK Biobank—both in the journal Nature. The first team comprised researchers from the U.K., Australia ...
(Medical Xpress)—A trio of researchers with Tamagawa University and the National Institute of Information and Communications Technology, both in Japan, has found that it is possible to predict the level of depression a ...
A couple of years ago a scientist looking at dozens of MRI scans of human brains noticed something surprising. A large, fiber pathway that seemed to be part of the network of connections that process visual information showed ...
Nov 17, 2014
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(Medical Xpress)—One way to increase our understanding of bilateral brains, like our own, is to inspect their paired sensory systems. In our visual system, the optic nerves normally combine at a place called the optic chiasm. ...
Although many areas of the human brain are devoted to social tasks like detecting another person nearby, a new study has found that one small region carries information only for decisions during social interactions. Specifically, ...
Jul 5, 2012
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IQ, the standard measure of intelligence, can increase or fall significantly during our teenage years, according to research funded by the Wellcome Trust, and these changes are associated with changes to the structure of ...
Oct 19, 2011
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Magnetic Resonance Imaging (MRI), or nuclear magnetic resonance imaging (NMRI), is primarily a medical imaging technique most commonly used in radiology to visualize the internal structure and function of the body. MRI provides much greater contrast between the different soft tissues of the body than computed tomography (CT) does, making it especially useful in neurological (brain), musculoskeletal, cardiovascular, and oncological (cancer) imaging. Unlike CT, it uses no ionizing radiation, but uses a powerful magnetic field to align the nuclear magnetization of (usually) hydrogen atoms in water in the body. Radio frequency (RF) fields are used to systematically alter the alignment of this magnetization, causing the hydrogen nuclei to produce a rotating magnetic field detectable by the scanner. This signal can be manipulated by additional magnetic fields to build up enough information to construct an image of the body.:36
Magnetic Resonance Imaging is a relatively new technology. The first MR image was published in 1973 and the first cross-sectional image of a living mouse was published in January 1974. The first studies performed on humans were published in 1977. By comparison, the first human X-ray image was taken in 1895.
Magnetic Resonance Imaging was developed from knowledge gained in the study of nuclear magnetic resonance. In its early years the technique was referred to as nuclear magnetic resonance imaging (NMRI). However, as the word nuclear was associated in the public mind with ionizing radiation exposure it is generally now referred to simply as MRI. Scientists still use the term NMRI when discussing non-medical devices operating on the same principles. The term Magnetic Resonance Tomography (MRT) is also sometimes used.
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