Answer
A decusssation of elements of a figure or structure to produce the form of an "X".. The X represents the Roman numeral for the Arabic numeral 10. In the metric system , and in English, generally, 10, or ten-fold is indicated by the prefix deca/deka from which we get decussation.
Work Step by Step
In neuroanatomy, pyramidal decussation, is the crossing over of neurons of the corticospinal tracts from one side of the brain to the contralateral side-- only 90% of the nerve fibers cross.. This crossing over takes place just above the junction of the medulla oblongata and the spinal cord.
