1 Future-Spot spread model assumes that future oil spot price is determined by a combination of current spot price and current futures price, and a properly constructed spread between these two current prices can predict the future oil spot price. 2  Mathematically, the model could be presented as:
corticospinal tract The nervous system tract that conducts impulses from the brain to the spinal cord. It contains mostly motor axons and is made up of two separate tracts in the spinal cord: the lateral corticospinal tract and the anterior corticospinal tract.
primary motor pathway descending from motor cortex to brainstem (where it decussates) and thence to the spinal cord, subserving contralateral voluntary motor control; injuries to the corticospinal tract show characteristics of an upper motor neurone lesion.orticospinal tract, any of two groups of nerve fibers (the anterior corticospinal tract and lateral corticospinal tract) that originate in the cerebral cortex and run through the spinal cord. They are responsible for carrying motor fibers.