Decussate, arranged in pairs which successively cross each other, 71.
Thus, leaves normally opposite and decussate may, by fusion, become alternate.
The remaining fibres pass down as the direct pyramidal tract, and decussate in the cord near their termination.
These are sometimes marked with a decussate cross, as was done to facilitate fracture during administration.
The whorls or pairs alternate or cross each other, usually at right angles, that is, they decussate.