Competitive Parallel Processing of Millisecond Scale in the Neocortical Circuitry
Cortical processing of the millisecond scale is analyzed with a mathematical model of cortical circuits. First, it is shown that cortical areas composed of columns and their lateral inhibition are capable of detecting timing of synaptic input to the columns in the millisecond range. Second, it is indicated that the cortical circuits may be reinforced by signals of the hypothalamic reward system so that the first actvated columns of every area may lead neuroual activation to correct motor commands. These suggest the whole cortical processing can be completed in a few hundred milliseconds after sufficient learning.
KeywordsMotor Cortex Lateral Inhibition Sensory Cortex Cortical Processing Association Area
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- Nakamura, K., “Reward-mediated learning mechanisms of the neoeortico-thalamo-hippocampal system,” N euro sci. Res. Suppl, vol. 16, p. S174, 1991.Google Scholar
- Jahnsen, H. and Llinás, R., “Electrophysiological properties of guinea-pig thalamic neurones: an invitro study,” J. Physiol., vol. 349, pp. 205–226, 1984.Google Scholar
- Iriki, A., Pavlides, C, Keller, A., and Asanuma, H., “Long-term potentiatkm of thalamic input to the motor cortex induced by coactivation of tlialamocortical and corticocortical afférents,” J. Neurophysiol, vol. 65, pp. 1435–1441, 1991.Google Scholar
- Nakamura, K., “A theory of cerebral learning regulated by the reward system. II: optimality of parallel processing,” submitted.Google Scholar