Final answer:
The indirect circuit for basal ganglia passes through the globus pallidus external segment and subthalamic nucleus, leading to reinforcement of the thalamic inhibition and resulting in the opposite signal of the original excitatory signal.
Step-by-step explanation:
The use of an indirect circuit for basal ganglia would involve a projection of axons from the striatum through the globus pallidus external segment (GPe) and onto the subthalamic nucleus (STN), finally projecting to the globus pallidus internal segment/substantia nigra pars reticulata (GPI/SNr). This indirect pathway causes the reinforcement of the normal inhibition of the thalamus, which in turn results in a decreased excitation of the cerebral cortex. Therefore, the end result would be the opposite signal from the original excitatory signal from the cortex.