The brain must dynamically integrate, coordinate, and respond to internal and external
stimuli across multiple time scales. Non-invasive measurements of brain activity with fMRI …

The majority of functional neuroscience studies have focused on the brain's response to a
task or stimulus. However, the brain is very active even in the absence of explicit input or …

During performance of attention-demanding cognitive tasks, certain regions of the brain
routinely increase activity, whereas others routinely decrease activity. In this study, we …

Blood flow in the brain is regulated by neurons and astrocytes. Knowledge of how these
cells control blood flow is crucial for understanding how neural computation is powered, for …

On the basis of task-related imaging studies in normal human subjects, it has been
suggested that two attention systems exist in the human brain: a bilateral dorsal attention …

The traditional approach to studying brain function is to measure physiological responses to
controlled sensory, motor and cognitive paradigms. However, most of the brain's energy …

Functional brain imaging with positron emission tomography and magnetic resonance
imaging has been used extensively to map regional changes in brain activity. The signal …

Traditionally studies of brain function have focused on task-evoked responses. By their very
nature, such experiments tacitly encourage a reflexive view of brain function. Although such …

The brain continuously adapts its processing machinery to behavioural demands. To
achieve this, it rapidly modulates the operating mode of cortical circuits, controlling the way …

Neural responses are typically characterized by computing the mean firing rate, but
response variability can exist across trials. Many studies have examined the effect of a …