ECON 1 Lecture Notes - Lecture 15: Multielectrode Array, Sensorimotor Rhythm, Hebbian Theory
Document Summary
Keywords: bci, connectionism, activation functions, graceful degradation, delta rule. History of bcis: research into the link between brain physiology and behaviour with instrumental learning laid the foundations for the development of most current bcis. Single-neuron recording approaches were later tested in humans with tetraplegia. Sinusoidal frequencies in the alpha range (8 13 hz) that can be detected at the somatosensory and motor cortical regions. Patients select a letter from a matrix in which each letter is transiently illuminated at random. Usually, the observer listens to a sequence of letters, and a p300 event-related potential is evoked if the intended target letter appears; Patients with neuropsychiatric disorders have been successfully trained in an instrumental learning task that enables control of the bold signal. Detection of bold signals that result from specific mental imagery has also been used in healthy participants to enable selection of all letters of the alphabet.
