hemodynamic response function

The hemodynamic response function (HRF) describes how blood flow in the brain changes in response to neural activity. When a specific area of the brain is active, it requires more oxygen and nutrients, leading to an increased blood supply to that region. This delayed response creates a characteristic curve that researchers study using imaging techniques like fMRI. By analyzing these changes, scientists can understand which brain areas are involved in various mental processes or tasks, helping to map brain function and investigate conditions like strokes or neurodegenerative diseases.