Figure 6.
Simplified representation of the cortico-striatal processing unit in which cortical information leading to a movement is processed via an intra-cortical and (parallel) extra-pyramidal route (Loonen and Ivanova, 2013). The converging organization of the extrapyramidal circuits results in a re-entry circuit. (A) Sensory input, (B) projections to brain stem and spinal cord, and (C) projection to and from ipsilateral and contralateral cortical areas. NS, non-specific part; S, specific part. © A. J. M. Loonen.