Zolpidem reduces the blood oxygen level-dependent signal during visual system stimulation
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چکیده
منابع مشابه
Regional dynamic signal changes during controlled hyperventilation assessed with blood oxygen level-dependent functional MR imaging.
PURPOSE To quantitate the amplitude changes and temporal dynamics of regional functional MR imaging signals during voluntary hyperventilation using blood oxygen level-dependent contrast echo-planar imaging. METHODS Seven male subjects were studied during voluntary hyperventilation (PetCO2 = 20 mm Hg) regulated by capnometry. Measurements were made on multisection echo-planar MR images obtaine...
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BACKGROUND Recent research suggests that variability in brain signal provides important information about brain function in health and disease. However, it is unknown whether blood oxygen level-dependent (BOLD) signal variability is altered in post-traumatic stress disorder (PTSD). We aimed to identify the BOLD signal variability changes of PTSD patients during symptom provocation and compare t...
متن کاملMagnocellular and parvocellular visual pathways have different blood oxygen level-dependent signal time courses in human primary visual cortex.
PURPOSE The magnocellular and parvocellular pathways (M and P pathways) are the major pathways of the visual system, with distinct histologic and physiologic properties that may also have different metabolic characteristics. We hypothesize that the differences of the 2 visual pathways would also manifest as differences in the signal time course of blood oxygen level-dependent functional MR imag...
متن کاملThe neural basis of the blood-oxygen-level-dependent functional magnetic resonance imaging signal.
Magnetic resonance imaging (MRI) has rapidly become an important tool in clinical medicine and biological research. Its functional variant (functional magnetic resonance imaging; fMRI) is currently the most widely used method for brain mapping and studying the neural basis of human cognition. While the method is widespread, there is insufficient knowledge of the physiological basis of the fMRI ...
متن کاملSystemic theophylline augments the blood oxygen level-dependent response to forepaw stimulation in rats.
BACKGROUND AND PURPOSE Functional MR imaging with blood oxygen level-dependent (BOLD) contrast enhancement is believed to rely on changes in cerebral blood flow and deoxyhemoglobin level to estimate the location and degree of neural activation. We studied the relationship between neural activation and the observed BOLD response by using theophylline, an antagonist of the inhibitory neurotransmi...
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ژورنال
عنوان ژورنال: Progress in Neuro-Psychopharmacology and Biological Psychiatry
سال: 2011
ISSN: 0278-5846
DOI: 10.1016/j.pnpbp.2011.05.015