The coupling controversy
نویسندگان
چکیده
منابع مشابه
The coupling controversy
Functional magnetic resonance imaging (fMRI) relies on the well-known phenomenon of coupling between neuronal activity and brain blood flow. For nearly a century, the presumption was that hemodynamics were coupled to neuronal activity via energy demand and oxidative metabolism. Early (15)O positron-emission tomographic (PET) studies challenged this theory, demonstrating a physiological "uncoupl...
متن کاملNEUROGENIC HYPERTENSION: REPORT OF FIVE CASES TO HIGHLIGHT THE CONTROVERSY
The entity of "neurogenic hypertension" is defined as arterial hypertension caused explicitly by derangement of the intricate network of the central nervous system. Among 193 cases of cranial rhizopathies operated on between 1984 and 1995 at this center, 5 cases of established arterial hypertension with concomitant rhizopathies also underwent ventrolateral medullary decompression. The elev...
متن کاملThe Bimodal Nature of Neurovascular Coupling
Neurons, by virtue of their complex and continuously changing signaling roles in brain, must be able to regulate access to energy in order to maintain their ability to communicate meaningful frequency-encoded information. This is accomplished by release of neurotransmitters to astrocytes that in turn signal the vascular system to increase cerebral blood flow (CBF). This process has been termed ...
متن کاملThe cigarette controversy.
This study examines the history of the cigarette controversy using the tobacco documents as a roadmap to explore the following four questions: (a) What did tobacco companies know about the health risks of smoking and when did they know it? (b) What evidence is there that tobacco companies conspired to deliberately mislead the public about the health risks of smoking? (c) How were scientists inv...
متن کاملDeciphering the MSG controversy.
Monosodium glutamate (MSG), a common flavor enhancer in various canned food and stereotypically associated with food in Chinese restaurants, has been claimed and tested to have side effects including headache and dizziness. However, the mechanism behind MSG-induced headache was not clear. Using dissociated mouse neuronal culture and cell injury assays, we determined whether incubation of neuron...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: NeuroImage
سال: 2012
ISSN: 1053-8119
DOI: 10.1016/j.neuroimage.2012.01.103