Review:
Functional Near Infrared Spectroscopy (fnirs)
overall review score: 4.2
⭐⭐⭐⭐⭐
score is between 0 and 5
Functional Near-Infrared Spectroscopy (fNIRS) is a non-invasive neuroimaging technique that measures brain activity by detecting changes in blood oxygenation and hemoglobin concentration in the cortical areas. Utilizing near-infrared light, typically within the 650–950 nm wavelength range, fNIRS provides insights into neural functioning, cognitive processes, and hemodynamic responses associated with various mental tasks or stimuli. It is often used in neuroscience research, clinical diagnostics, brain-computer interfaces, and developmental studies due to its portability and safety.
Key Features
- Non-invasive and safe for repeated use
- Portable and relatively easy to set up
- Capable of measuring cortical brain activity in real-time
- Suitable for use with various populations, including children and neonates
- Less sensitive to movement artifacts compared to other neuroimaging techniques like fMRI
- Provides functional insights into blood oxygenation changes linked to neural activity
Pros
- Non-invasive with minimal discomfort for participants
- Portable and accessible compared to traditional imaging methods
- Suitable for naturalistic and bedside settings
- Cost-effective relative to MRI-based techniques
- Allows for monitoring brain activity over extended periods
Cons
- Limited spatial resolution primarily to superficial cortical areas
- Sensitive to artifacts from head movement or external light interference
- Cannot measure deep brain structures effectively
- Interpretation of signals can be complex, requiring sophisticated analysis techniques
- Susceptible to physiological variables such as blood flow changes unrelated to neuronal activity