the stn may integrate the somatic motor information from various cortical/subcortical brain areas ( including the motor cortex , striatum , globus pallidus , thalamus and tpc ) , and disperse it predominantly to the pallidal complex , substantia nigra and striatum by way of axon collaterals , and to a lesser degree to the tpc through separate fibers .
C0038590
substantia nigra
C0175412
tpc