Cerebellum

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Role is for fine tuning movement.

It does this by comparing the commands of the motor cortex --> and also propioceptive feedback about movements that have occurred.

If differences between planned and actual movement occur --> cerebellum uses this feedback to correct errors and influence future output of the motor cortex

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Cerebellum --> motor activity --> contralateral motor cortices (via the thalamus) and to contralateral red nuceli

Therefore the corticospinal tract and rubrospinal tract (important for voluntary motor activity) cross back over on route to their target motor neurons --> producing symptoms on the same side as the body of the lesion