Mary M. Heinricher, Ph.D.
- Professor of Neurological Surgery, School of Medicine
- Senior Associate Dean, Research, Office of the Dean, School of Medicine
- Vice Chair, Research, Neurological Surgery, School of Medicine
- M.D./Ph.D. Program Committee, School of Medicine
Biography
The interest of this laboratory is on brainstem mechanisms involved in pain modulation. Our focus is on opioid-sensitive circuits within the rostral ventral medulla, which is a crucial element in a pain-modulating network with links in the midbrain, medulla and spinal cord. This network contributes to the variability in pain sensitivity seen in different situations (for example under conditions of fear or extreme stress), and it is an important substrate for opioids and other analgesic drugs such as cannabinoids. We use single cell recording in combination with pharmacological tools to analyze how this system is activated, and we have identified two distinct classes of pain modulating neurons. ON cells are directly sensitive to opioids, and we recently showed that these neurons facilitate nociceptive transmission. OFF-cells exert a net inhibitory effect on nociception, and we were able to demonstrate that disinhibition of these neurons is central to the antinociceptive actions of opioids within the medulla. Currently, we are interested in identifying neurotransmitters that activate these two cell classes differentially to promote or suppress pain. We are also interested in how this modulatory system is activated under physiological conditions, and are looking at the inputs from limbic forebrain structures such as the hypothalamus to the rostral ventral medulla in an attempt to investigate this issue.
In addition to the degrees listed below, Dr. Heinricher was a postdoctoral fellow in neuroscience at the University of California, San Francisco, from 1983-86.
Dr. Heinricher holds joint faculty appointments in the Departments of Behavioral Neuroscience and Physiology and Pharmacology. Previous positions include Associate Professor, Depts. of Neurological Surgery, and Physiology and Pharmacology, OHSU, Portland, Ore. (1995-2001); Adjunct Assistant Professor of Neurophysiology, Department of Neurology, University of California, San Francisco, Calif. (1987-1995); Research Associate, Department of Neurology, University of California, San Francisco, Calif. (1986-87); Instructor, Department of Psychology, Division of Continuing Education, Northwestern University, Evanston, Ill. (1982-83).
Her non-academic interests include native plants and ethnobotany.
Education and training
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Degrees
- B.A., 1977, University of Missouri
- Ph.D., 1983, Northwestern University
Publications
Publications
CFA-treated mice induce hyperalgesia in healthy mice via an olfactory mechanism
European Journal of Pain (United Kingdom)The headache research priorities
HeadacheThe potential role of chronic pain and the polytrauma clinical triad in predicting prodromal PD
Clinical Parkinsonism and Related DisordersBrainstem pain-modulating neurons are sensitized to visual light in persistent inflammation
Neurobiology of PainDirect and Indirect Nociceptive Input from the Trigeminal Dorsal Horn to Pain-Modulating Neurons in the Rostral Ventromedial Medulla
Journal of NeurosciencePhotosensitivity Is Associated with Chronic Pain following Traumatic Brain Injury
Journal of neurotraumaDifferent Methods for Traumatic Brain Injury Diagnosis Influence Presence and Symptoms of Post-Concussive Syndrome in United States Veterans
Journal of neurotraumaPhysiological properties of pain-modulating neurons in rostral ventromedial medulla in female rats, and responses to opioid administration
Neurobiology of PainPlasticity in the link between pain-transmitting and pain-modulating systems in acute and persistent inflammation
Journal of NeuroscienceIncreased sleep disturbances and pain in veterans with comorbid traumatic brain injury and posttraumatic stress disorder
Journal of Clinical Sleep MedicineAnterior cingulate cortex contributes to alcohol withdrawal- induced and socially transferred hyperalgesia
eNeuroOptogenetic evidence for a direct circuit linking nociceptive transmission through the parabrachial complex with pain-modulating neurons of the rostral ventromedial medulla (RVM)
eNeuroA possible neural mechanism for photosensitivity in chronic pain
PainDistinct pathways for norepinephrine- and opioid-triggered antinociception from the amygdala
European Journal of Pain (United Kingdom)Parabrachial complex links pain transmission to descending pain modulation
PainSocial transfer of pain in mice
Science AdvancesNeuropeptide Y in the rostral ventromedial medulla reverses inflammatory and nerve injury hyperalgesia in rats via non-selective excitation of local neurons
NeuroscienceAdaptations in responsiveness of brainstem pain-modulating neurons in acute compared with chronic inflammation
Pain