1. The medulla is above the decussation and the spinal cord below. 2. Whereas damage below the pyramidal decussation will result in ipsilateral motor deficits. 3. Decussation usually occurs 1-2 spinal nerve segments above the point of entry.4. :The decussation may be a survival trait. 5. Damage to the body above the pyramidal decussation , will cause contralateral motor deficits. 6. The pyramidal decussation marks the border between the spinal cord and the medulla oblongata. 7. There is no decussation in the lateral corticospinal tract after the decussation at the medullary pyramids. 8. There is no decussation in the lateral corticospinal tract after the decussation at the medullary pyramids. 9. There, partial decussation occurs, and about 53 % of the fibers cross to form the optic tracts. 10. Between the two pyramids can be seen a decussation of fibres which marks the transition from the medulla to the spinal cord.
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