Complex sentence: The motor and somatosensory cortices, the intralaminar nuclei of the thalamus, and the substantia nigra project to the putamen, and the putamen projects to premotor and supplementary motor areas of cortex via the globus pallidus and thalamus.
Split into simpler sentences: The motor and somatosensory cortices, the intralaminar nuclei of the thalamus, and the substantia nigra project to the putamen. The putamen projects to premotor and supplementary motor areas of cortex via the globus pallidus and thalamus.