Neuroscience Foundations for BCIs
Neurons and Population Activity
Neural Basics
BCIs usually rely on population activity rather than a single neuron. Neurons communicate using electrical impulses called action potentials, and groups of neurons produce patterns that can be measured as spikes, local field potentials, or slower electrical rhythms.
Important Distinction
A single neuron can be informative, but practical BCIs often depend on ensembles because real-world signals are variable and noisy.
Brain Areas Commonly Used in BCI
Common Signals and Sources
| Brain source | Typical use | Strengths |
|---|---|---|
| Motor cortex | Movement intention decoding | Strong relationship to movement |
| Occipital cortex | Visual evoked responses | Useful for stimulus-based BCIs |
| Sensory cortex | Touch and sensory feedback research | Can support bidirectional systems |
| Hippocampal and deeper structures | Experimental memory-related work | Scientifically rich but technically challenging |