The Collaborative International Dictionary of English v.0.48:

corticoefferent \corticoefferent\ adj. (Med.)
   directed from the cerebral cortex; -- of nerves and nerve
   impulses.

   Syn: corticofugal, corticifugal.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

corticoefferent
    adj 1: of a nerve fiber passing outward from the cerebral
           cortex; "corticofugal discharges" [syn:
           corticoefferent, corticofugal, corticifugal]