A new study shows how neurochemicals affect fMRI readings
The brain is an incredibly complex and active organ that uses electricity and chemicals to transmit and receive signals between its sub-regions.
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The brain is an incredibly complex and active organ that uses electricity and chemicals to transmit and receive signals between its sub-regions.
6 hours ago
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New Stanford research adds to evidence that the seasonality of respiratory illnesses, like COVID-19 or the flu, can be linked to indoor humidity levels. The study, which found that ventilation reduces the presence of naturally ...
Mar 13, 2024
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The human/mammalian brain is arguably the most complex biological system known. Even after witnessing massive progress in neuroscience, we are still far from a comprehensive understanding of mammalian brains and their pathologies. ...
Mar 12, 2024
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A new study of people who speak many languages has found that there is something special about how the brain processes their native language.
Mar 10, 2024
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How much do our emotions depend on our senses? Does our brain and body react in the same way when we hear a fearful scream, see an eerie shadow, or smell a sinister odor? And does hearing upbeat music or seeing a colorful ...
Mar 8, 2024
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Morphological characteristics of the vestibular aqueduct (VA) are associated with the occurrence of Meniere disease (MD), according to a study published online Feb. 17 in The Laryngoscope.
Mar 8, 2024
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The hippocampus—a seahorse-shaped region of the brain that plays a particularly important role in cognitive aging and memory function—has been studied as a singular region for several years. However, until now, there ...
Mar 7, 2024
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With technology developed at UC Riverside, scientists can, for the first time, make high resolution images of the human spinal cord during surgery. The advancement could help bring real relief to millions suffering chronic ...
Mar 7, 2024
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An international study led by the University of Oulu, Finland, and the University of Cambridge, U.K., found numerous associations between blood biomarkers and diseases, and identified more than 400 genomic regions that affect ...
Mar 7, 2024
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Subgroups of Meniere disease (MD) can be made based on the presence or absence of endolymphatic hydrops (EH) and nystagmus, according to a study published online Jan. 10 in Frontiers in Neurology.
Mar 6, 2024
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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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