Premotor and association areas > planning actions based on perception information and past experience and future goals
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Lowest level of Hierarchy of motor system
Motor cortex and brain stem > assistance of cerebellum and basal ganglia > translate action goals into movement plan
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All signals from arms and legs originate in the
spinal cord
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Signals generated in alpha motor neurons directly associated to activation of specific muscles
spinal cord
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Neural activity represents a mixture of muscles and movement direction information
Primary motor cortex
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Neural codes become more abstract and more related to the goal of an action rather than to the specific muscles patterns required to produce the movement
secondary motor areas
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Signal activity modulated by
cerebellum and basal ganglia
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Contralateral Organisation...
somatotopic representation is restricted to one side of the body in primary motor areas
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Prefrontal Cortex (PFC)
Higher order motor control: decisions about actions and outcome
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Posterior Parietal Cortex (PPC)
Generation of mental body image (position of body)
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Premotor Cortex (Area 6) (PMC)
Supplementary motor area - internally controlled area; premotor area - externally guided action
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Primary motor cortex (Area 4)
Motor Commands
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Basal Ganglia
Movement Initiation
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Cerebellum
Regulation of muscle tone, movement coordination, motor timing, motor learning
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