| Disinhibition of off-cells and antinociception produced by an opioid action within the rostral ventromedial medulla MM Heinricher, MM Morgan, V Tortorici, HL Fields Neuroscience 63 (1), 279-288, 1994 | 311 | 1994 |
| Analysis of opioid efficacy, tolerance, addiction and dependence from cell culture to human MM Morgan, MDJ Christie British journal of pharmacology 164 (4), 1322-1334, 2011 | 306 | 2011 |
| Direct and indirect actions of morphine on medullary neurons that modulate nociception MM Heinricher, MM Morgan, HL Fields Neuroscience 48 (3), 533-543, 1992 | 277 | 1992 |
| Periaqueductal gray neurons project to spinally projecting GABAergic neurons in the rostral ventromedial medulla MM Morgan, KL Whittier, DM Hegarty, SA Aicher Pain 140 (2), 376-386, 2008 | 187 | 2008 |
| GABAergic modulation of the analgesic effects of morphine microinjected in the ventral periaqueductal gray matter of the rat A Depaulis, MM Morgan, JC Liebeskind Brain research 436 (2), 223-228, 1987 | 186 | 1987 |
| Microinjection of morphine into the rostral ventromedial medulla produces greater antinociception in male compared to female rats JS Boyer, MM Morgan, RM Craft Brain research 796 (1-2), 315-318, 1998 | 150 | 1998 |
| Pros and cons of clinically relevant methods to assess pain in rodents A Tappe-Theodor, T King, MM Morgan Neuroscience & Biobehavioral Reviews 100, 335-343, 2019 | 143 | 2019 |
| Circuitry linking opioid-sensitive nociceptive modulatory systems in periaqueductal gray and spinal cord with rostral ventromedial medulla MM Morgan, MM Heinricher, HL Fields Neuroscience 47 (4), 863-871, 1992 | 141 | 1992 |
| Stimulation of the periaqueductal gray matter inhibits nociception at the supraspinal as well as spinal level MM Morgan, JH Sohn, JC Liebeskind Brain research 502 (1), 61-66, 1989 | 139 | 1989 |
| Antinociception mediated by the periaqueductal gray is attenuated by orphanin FQ MM Morgan, JE Grisel, CS Robbins, DK Grandy Neuroreport 8 (16), 3431-3434, 1997 | 138 | 1997 |
| The influence of non-nociceptive factors on hot-plate latency in rats A Gunn, EN Bobeck, C Weber, MM Morgan The Journal of Pain 12 (2), 222-227, 2011 | 134 | 2011 |
| Chronic nicotine and withdrawal effects on body weight and food and water consumption in female rats ED Levin, MM Morgan, C Galvez, GD Ellison Physiology & behavior 39 (4), 441-444, 1987 | 124 | 1987 |
| Immobility and flight associated with antinociception produced by activation of the ventral and lateral/dorsal regions of the rat periaqueductal gray MM Morgan, PK Whitney, MS Gold Brain research 804 (1), 159-166, 1998 | 120 | 1998 |
| Pronounced changes in the activity of nociceptive modulatory neurons in the rostral ventromedial medulla in response to prolonged thermal noxious stimuli MM Morgan, HL Fields Journal of neurophysiology 72 (3), 1161-1170, 1994 | 108 | 1994 |
| Morphine preferentially activates the periaqueductal gray–rostral ventromedial medullary pathway in the male rat: a potential mechanism for sex differences in antinociception DR Loyd, MM Morgan, AZ Murphy Neuroscience 147 (2), 456-468, 2007 | 101 | 2007 |
| Contribution of dopamine receptors to periaqueductal gray-mediated antinociception PJ Meyer, MM Morgan, LB Kozell, SL Ingram Psychopharmacology 204, 531-540, 2009 | 100 | 2009 |
| PAG mu opioid receptor activation underlies sex differences in morphine antinociception SA Bernal, MM Morgan, RM Craft Behavioural brain research 177 (1), 126-133, 2007 | 100 | 2007 |
| Periaqueductal gray P Carrive, MM Morgan The human nervous system 3, 368-401, 2012 | 93 | 2012 |
| Evidence for an intrinsic mechanism of antinociceptive tolerance within the ventrolateral periaqueductal gray of rats DA Lane, PA Patel, MM Morgan Neuroscience 135 (1), 227-234, 2005 | 92 | 2005 |
| Periaqueductal gray stimulation produces a spinally mediated, opioid antinociception for the inflamed hindpaw of the rat MM Morgan, MS Gold, JC Liebeskind, C Stein Brain research 545 (1-2), 17-23, 1991 | 90 | 1991 |
