Bold Blood Oxygenation Level Dependent
Mostrando 13-15 de 15 artigos, teses e dissertações.
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13. Morphology and the internal structure of words
Morphology is the aspect of language concerned with the internal structure of words, and languages vary in the extent to which they rely on morphological structure. Consequently, it is not clear whether morphology is a basic element of a linguistic structure or whether it emerges from systematic regularities between the form and meaning of words. Here, we lo
National Academy of Sciences.
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14. Cerebral energetics and spiking frequency: The neurophysiological basis of fMRI
Functional MRI (fMRI) is widely assumed to measure neuronal activity, but no satisfactory mechanism for this linkage has been identified. Here we derived the changes in the energetic component from the blood oxygenation level-dependent (BOLD) fMRI signal and related it to changes in the neuronal spiking frequency in the activated voxels. Extracellular record
National Academy of Sciences.
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15. Total neuroenergetics support localized brain activity: Implications for the interpretation of fMRI
In α-chloralose-anesthetized rats, changes in the blood oxygenation level-dependent (BOLD) functional MRI (fMRI) signal (ΔS/S), and the relative spiking frequency of a neuronal ensemble (Δν/ν) were measured in the somatosensory cortex during forepaw stimulation from two different baselines. Changes in cerebral oxygen consumption (ΔCMRO2/CMRO2) were der
National Academy of Sciences.