Effects of (+)-methamphetamine on path integration and spatial learning, but not locomotor activity or acoustic startle, align with the stress hyporesponsive period in rats. - Vorhees CV; Skelton MR; Grace CE; Schaefer TL; Graham DL; Braun AA; Williams MT (International journal of developmental neuroscience : the official journal of the International Society for Developmental Neuroscience, 2009)