state-dependent learning

n.
  1. Learning associated with a specific state of sleep or wakefulness or with a chemically altered state, such that the learned information cannot be recalled or used unless the subject is restored to the state that existed when learning first occurred.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.