pyramidal decussation การใช้

• Whereas damage below the pyramidal decussation will result in ipsilateral motor deficits.
• Damage to the body above the pyramidal decussation, will cause contralateral motor deficits.
• The pyramidal decussation marks the border between the spinal cord and the medulla oblongata.
• It is formed by approximately 2 % of the corticospinal fibers that do not cross to the opposite side of the brainstem in the pyramidal decussation.
• Damage to different parts of the body will cause deficits, depending on whether the damage is above ( rostral ) or below ( caudal ) the pyramidal decussation.
• About 90 % of these fibers leave the pyramids in successive bundles and decussate ( cross over ) in the anterior median fissure of the medulla oblongata as the " pyramidal decussation " or " motor decussation ".