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
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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- Fall '11
- motor cortex, motor pathways