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Psy 123_Lec 10 Action

different pathways represent different actions plans

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Unformatted text preview: athways represent different actions plans.! Selection of an action plan in the parietal and premotor cortex is biased by reciprocal inputs from the basal ganglia and prefrontal cortex which collect information for action selection (double lines). ! The thicker solid line represents the plan that has been selected for, leading to a motor command.! The final selected action is released into execution and causes overt feedback through the environment (dashed black arrow).! Cisek (2007) Philosophical Transactions of the Royal Society of London! Mirror Neurons! Neurons that show similar responses when an animal is performing an action or observing an action produced by another individual, i.e., the neuron “mirrors” the behavior of the other. These neurons have been found in primates and other species in the premotor cortex, the supplementary area, and the parietal lobe. Some suggest that mirror neurons are the key link between perception and action, and some have speculated that they are the basis of many higher order functions like language.! Discovered by Risolotti; found neuron that responded to reaching movement. Even when researcher made the same movement, the monkey neuron responded. Key discovery because provides possible interface between the perception of action and the carrying out of actions. May be a large basis of our perceptual knowledge. See a lot in babies who copy when you stick out your tongue ("tongue protrusion"). The Brain-Machine Interface! Uses the same decoding principles that we discussed on mind reading in object recognition to transform neural signals from the motor and premotor cortex to a computer that can than control the movements of a robot. Researchers have discovered that action representations within the brain are very flexible and adaptable.! Finding they don't need to be right when transform neural signals because the motor cortex adapts its firing depending on the circumstances and will keep rewiring itself til it gets the correct responses....
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