Brain-Computer Interface

Brain-Computer Interface

1. [A BCI] records neural activity reflecting the motor intentions of the individual and converts this activity into control signals for external devices.”

2. Tetraplegia,

   • paralysis of all four limbs

3. Motor imagery

   • a [behavioural] state in which an individual mentally simulates a voluntary movement

4. cortex

   • The outer layer of the cerebrum composed of folded gray matter and playing an important role in perception, movement, and consciousness

5. neuron

   • a specialized brain cell that transmits impulses

6. Neuronal selectivity

   • The firing of neurons in primary motor cortex is associated with a specific voluntary behaviours.
     • Sensory neurons are selective too, e.g., a neuron in primary auditory cortex might fire selectively to any acoustic tone near 440 Hz, but fire no spike for tones <400 Hz or >600 Hz.

7. EEG

   • Biopotentials on the scalp reflect the firing of neurons in cortex; measurements of these biopotentials are called EEG

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