list the 3 main parts that are important for the structure of a voluntary movement eg drinking a glass of wine

Sensory integration

Target identification (location/thing)

Planning

movements required to bring glass of wine to mouth relative positions of wine and mouth need to be computed so movement can be planned

Execution

commands from cortical and brainstem centres need to be ordered and initiated in order to provide the correct strength grip and to smoothly move glass from initial location to mouth

each phase involves distinct areas of the cerebral cortex as well as feedback from basal ganglia and cerebellum

List 3 inputs to corticospinal output that fine tune movement

role of pre motor cortex

Brainstem motor nuclei

Spinal circuits controlling proximal and axial muscles

interestingly the neurons in this area begin to fire in primates prior to movement so basically it is preempting the movement

the premotor cortex is important in orienting the body in preparation for a voluntary movement