Corticospinal Tract (image) Neural Regeneration Research Share Print E-Mail Caption This corticospinal tract from a monkey brain can be seen to originate in the precentral gyrus, continue down through the internal capsule, and then down to the midbrain and medulla oblongata. Each fiber tract is continuous and uniform in the shape. Credit Neural Regeneration Research Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.