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. Author manuscript; available in PMC: 2015 Jun 22.
Published in final edited form as: J Neuropsychiatry Clin Neurosci. 2008 Fall;20(4):390–408. doi: 10.1176/appi.neuropsych.20.4.390

FIGURE 5. A Neuroanatomical Model That Incorporates Direct and Indirect Striatal Pathways.

FIGURE 5

GPi = globus pallidus interna; SNr = substantia nigra pars reticulata

In OCD, the direct pathway is strongly activated in relation to the indirect pathway resulting in OFC-subcortical hyperactivity. Large arrows represent inputs that are strengthened in patients with OCD. Reproduced with permission from Stein 2006 (96)