BOLD signal
fMRI's measured response
BOLD signal stands for blood-oxygen-level-dependent signal, the measurement used in functional MRI brain imaging.
When neurons fire, they consume oxygen, triggering increased blood flow to that region.
The BOLD signal detects this change in oxygenated versus deoxygenated blood, allowing researchers to infer which brain areas are active during specific tasks: The BOLD signal showed increased activity in the visual cortex.
- fMRIMagnetic neural activity imaging
- brainSeat of cognition
- brain activityMental processes occurring
- oxygenElement eight, colorless gas
- activationSetting into operation
neurons · scanner · cortex · gray matter · voxel · bloodflow · imaging · cognitive · response · contrast · MRI · deoxygenated · cerebral · mapping · task · neural · perfusion · functional
- brain scansMRI scan, CT scan, PET scan, fMRI, brain scan
- neuroimagingbrain MRI, functional MRI, brain scan, fMRI, voxel
bold, bolder, boldest, boldly, boldness, emboldened, embolden, signal, signals