Hippocampus 9: 452–457 Stackman RW, Tullman ML, Taube JS (2000) Maintenance of rat head direction cell firing during locomotion in the vertical plane. Journal of Neurophysiology 83: 393–405 Golob EJ, Stackman RW, Wong AC, Taube JS (2001) On the behavioral significance of head direction cells: Neural and behavioral dynamics during spatial memory tasks. Behavioral Neuroscience 115: 285–304 Bassett JP, Taube JS (2001) Neural correlates for angular head velocity in the rat dorsal tegmental nucleus. Journal of Neuroscience 21: 5740–5751 Baird JC, Taube JS, Peterson D (2001) Statistical and information properties of head direction cells. Perception & Psychophysics 63: 1026–1037 Stackman RW, Clark AS, Taube JS (2002) Hippocampal spatial representations require vestibular input. Hippocampus 12: 291–303 Taube JS, Calton JL, Stackman RW, Oman CM, Steven MS (2002) The Neurobiology for a Sense of Direction: An Update from on the ground, upside–down, and space-bound. Journal of Vestibular Research 11: 320-321 Golob EJ, Taube JS (2002) Differences between appetitive and aversive reinforcement on reorientation in a spatial working memory task.