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Health Sciences staff profiles

Associate Professor Dorothy Oorschot

PositionAssociate Professor / Associate Dean
DepartmentDepartment of Anatomy
QualificationsBSc(Hons)(W Aust) PhD(Otago)
Research summaryBrain research, hypoxia, stem cells, stereology, connectomics

Research

Brain research, including investigation of the effects of low oxygen levels (hypoxia) during the second trimester, or around birth, on brain development. Investigation of treatments to rescue the hypoxic-injured brain, including researching the restorative potential of adult-sourced stem cells. Mapping of the microcircuitry of the brain (i.e. connectomics) during health, and after injury, using electron microscopy. Three-dimensional anatomical methods used (i.e. stereology), primarily to increase knowledge on the basal ganglia of the brain. Stereological advice provided on request.

Publications

Oorschot, D. E. (2017). Cell types in the different nuclei of the basal ganglia. In H. Steiner & K. Y. Tseng (Eds.), Handbook of basal ganglia structure and function. (2nd ed.) (pp. 99-117). London, UK: Academic Press. doi: 10.1016/B978-0-12-802206-1.00005-2

Sizemore, R. J., Zhang, R., Lin, N., Goddard, L., Wastney, T. B., Parr-Brownlie, L. C., Reynolds, J. N. J., & Oorschot, D. E. (2016). Marked differences in the number and type of synapses innervating the somata and primary dendrites of midbrain dopaminergic neurons, striatal cholinergic interneurons and striatal spiny projection neurons in the rat. Journal of Comparative Neurology, 524(5), 1062-1080. doi: 10.1002/cne.23891

Aghoghovwia, B. E., & Oorschot, D. E. (2016). Absolute number of parvicellular and magnocellular neurons in the red nucleus of the rat midbrain: A stereological study. Journal of Anatomy, 229(3), 406-415. doi: 10.1111/joa.12495

Cameron, S. H., Alwakeel, A. J., Goddard, L., Hobbs, C. E., Gowing, E. K., Barnett, E. R., Kohe, S. E., Sizemore, R. J., & Oorschot, D. E. (2015). Delayed post-treatment with bone marrow-derived mesenchymal stem cells is neurorestorative of striatal medium-spiny projection neurons and improves motor function after neonatal rat hypoxia-ischemia. Molecular & Cellular Neuroscience, 68, 56-72. doi: 10.1016/j.mcn.2015.03.019

Oswald, M. J., Schulz, J. M., Kelsch, W., Oorschot, D. E., & Reynolds, J. N. J. (2015). Potentiation of NMDA receptor-mediated transmission in striatal cholinergic interneurons. Frontiers in Cellular Neuroscience, 9, 116. doi: 10.3389/fncel.2015.00116

Chapter in Book - Research

Oorschot, D. E. (2017). Cell types in the different nuclei of the basal ganglia. In H. Steiner & K. Y. Tseng (Eds.), Handbook of basal ganglia structure and function. (2nd ed.) (pp. 99-117). London, UK: Academic Press. doi: 10.1016/B978-0-12-802206-1.00005-2

Oorschot, D. E. (2010). Cell types in the different nuclei of the basal ganglia. In H. Steiner & K. Y. Tseng (Eds.), Handbook of basal ganglia structure and function. (pp. 63-74). London: Academic Press.

Oorschot, D. E., Tompkins, M. M., & Galvin, K. A. (2003). Effect of delayed treatment with basic fibroblast growth factor on the survival of striatal spiny projection neurons after perinatal hypoxia-ischemia. In K. Satoh, S. Suzuki & M. Matsunaga (Eds.), Advances in brain research. Cerebrovascular disorders and neurodegeneration. (pp. 71-79). Amsterdam: Elsevier.

Oorschot, D. E., Tunstall, M., & Wickens, J. (2002). Local connectivity between striatal spiny projection neurons: A re-evaluation. In L. Nicholson & R. L. N. Faull (Eds.), The Basal Ganglia VII. (pp. 421-434). USA: Plenum Publishers.

Wickens, J., & Oorschot, D. E. (2000). Neural dynamics and surround inhibition in the neostriatum: A possible connection. In R. Miller & J. R. Wickens (Eds.), Conceptual Advances in Brain Research, Brain Dynamics and the Striatal Complex. (pp. 141-150). Amsterdam: Harwood Academic.

Oorschot, D. E. (2000). The domain hypothesis: A central organizing principle for understanding neostriatal circuitry? In R. Miller & J. R. Wickens (Eds.), Conceptual Advances in Brain Research, Brain Dyamics and the Striatal Complex. (pp. 151-163). Amsterdam: Harwood Academic.

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Journal - Research Article

Sizemore, R. J., Zhang, R., Lin, N., Goddard, L., Wastney, T. B., Parr-Brownlie, L. C., Reynolds, J. N. J., & Oorschot, D. E. (2016). Marked differences in the number and type of synapses innervating the somata and primary dendrites of midbrain dopaminergic neurons, striatal cholinergic interneurons and striatal spiny projection neurons in the rat. Journal of Comparative Neurology, 524(5), 1062-1080. doi: 10.1002/cne.23891

Aghoghovwia, B. E., & Oorschot, D. E. (2016). Absolute number of parvicellular and magnocellular neurons in the red nucleus of the rat midbrain: A stereological study. Journal of Anatomy, 229(3), 406-415. doi: 10.1111/joa.12495

Cameron, S. H., Alwakeel, A. J., Goddard, L., Hobbs, C. E., Gowing, E. K., Barnett, E. R., Kohe, S. E., Sizemore, R. J., & Oorschot, D. E. (2015). Delayed post-treatment with bone marrow-derived mesenchymal stem cells is neurorestorative of striatal medium-spiny projection neurons and improves motor function after neonatal rat hypoxia-ischemia. Molecular & Cellular Neuroscience, 68, 56-72. doi: 10.1016/j.mcn.2015.03.019

Oswald, M. J., Schulz, J. M., Kelsch, W., Oorschot, D. E., & Reynolds, J. N. J. (2015). Potentiation of NMDA receptor-mediated transmission in striatal cholinergic interneurons. Frontiers in Cellular Neuroscience, 9, 116. doi: 10.3389/fncel.2015.00116

Kim, E. H., Thu, D. C. V., Tippett, L. J., Oorschot, D. E., Hogg, V. M., Roxburgh, R., … Faull, R. L. M. (2014). Cortical interneuron loss and symptom heterogeneity in Huntington disease. Annals of Neurology, 75(5), 717-727. doi: 10.1002/ana.24162

Barry, M. D., Boddington, L. J., Igelström, K. M., Gray, J. P., Shemmell, J., Tseng, K. Y., Oorschot, D. E., & Reynolds, J. N. J. (2014). Utility of intracerebral theta burst electrical stimulation to attenuate interhemispheric inhibition and to promote motor recovery after cortical injury in an animal model. Experimental Neurology, 261, 258-266. doi: 10.1016/j.expneurol.2014.05.023

Nana, A. L., Kim, E. H., Thu, D. C. V., Oorschot, D. E., Tippett, L. J., Hogg, V. M., … Faull, R. L. M. (2014). Widespread heterogenous neuronal loss across the cerebral cortex in Huntington's disease. Journal of Huntington's Disease, 3(1), 45-64. doi: 10.3233/JHD-140092

Oorschot, D. E., Voss, L., Covey, M., Goddard, L., Huang, W., Birchall, P., Bilkey, D. K., & Kohe, S. E. (2013). Spectrum of short- and long-term brain pathology and long-term behavioral deficits in male repeated hypoxic rats closely resembling human extreme prematurity. Journal of Neuroscience, 33(29), 11863-77. doi: 10.1523/jneurosci.0342-12.2013

Oorschot, D. E., Lin, N., Cooper, B. H., Reynolds, J. N. J., Sun, H., & Wickens, J. R. (2013). Synaptic connectivity between rat striatal spiny projection neurons in vivo: Unexpected multiple somatic innervation in the context of overall sparse proximal connectivity. Basal Ganglia, 3, 93-108. doi: 10.1016/j.baga.2013.04.001

Oorschot, D. E. (2012). The percentage of interneurons in the dorsal striatum of the rat, cat, monkey and human: A critique of the evidence. Basal Ganglia, 3(1), 19-24. doi: 10.1016/j.baga.2012.11.001

Oorschot, D. E. (2011). Indirect measures of neuroprotection are parameters to avoid: Examples from research on neonatal rat hypoxia-ischemia. Image Analysis & Stereology, 30(1), 1-9. doi: 10.5566/ias.v30.p1-9

Thu, D. C. V., Oorschot, D. E., Tippett, L. J., Nana, A. L., Hogg, V. M., Synek, B. J., … Faull, R. L. M. (2010). Cell loss in the motor and cingulate cortex correlates with symptomatology in Huntington's disease. Brain, 133(4), 1094-1110. doi: 10.1093/brain/awq047

Sizemore, R. J., Reynolds, J. N. J., & Oorschot, D. E. (2010). Number and type of synapses on the distal dendrite of a rat striatal cholinergic interneuron: A quantitative, ultrastructural study. Journal of Anatomy, 217, 223-235. doi: 10.1111/j.1469-7580.2010.01264.x

Oswald, M. J., Oorschot, D. E., Schulz, J. M., Lipski, J., & Reynolds, J. N. J. (2009). IH current generates the afterhyperpolarisation following activation of subthreshold cortical synaptic inputs to striatal cholinergic interneurons. Journal of Physiology, 587(24), 5879-5897. doi: 10.1113/jphysiol.2009.177600

Hobbs, C. E., & Oorschot, D. E. (2008). Neonatal rat hypoxia-ischemia: Long-term rescue of striatal neurons and motor skills by combined antioxidant-hypothermia treatment. Brain Pathology, 18(3), 443-454. doi: 10.1111/j.1750-3639.2008.00146.x

Hobbs, C. E., Murphy, M. P., Smith, R. A. J., & Oorschot, D. E. (2008). Neonatal rat hypoxia-ischemia: Effect of the anti-oxidant mitoquinol, and S-PBN. Pediatrics International, 50(4), 481-488. doi: 10.1111/j.1442-200X.2008.02705.x

Oorschot, D. E., Voss, L., Covey, M. V., Bilkey, D. K., & Saunders, S. E. (2007). ADHD-like hyperactivity, with no attention deficit, in adult rats after repeated hypoxia during the equivalent of extreme prematurity. Journal of Neuroscience Methods, 166, 315-322.

Covey, M. V., & Oorschot, D. E. (2007). Effect of hypothermic post-treatment on hypoxic-ischemic striatal injury, and normal striatal development, in neonatal rats: A stereological study. Pediatric Research, 62(6), 646-651.

Covey, M. V., Murphy, M. P., Hobbs, C. E., Smith, R. A. J., & Oorschot, D. E. (2006). Effect of the mitochondrial antioxidant, Mito Vitamin E, on hypoxic-ischemic striatal injury in neonatal rats: A dose-response and stereological study. Experimental Neurology, 199, 513-519.

Zhang, R., & Oorschot, D. E. (2006). Total number of neurons in the habenular nuclei of the rat epithalamus: A stereological study. Journal of Anatomy, 208, 577-585.

Partadiredja, G., Miller, R., & Oorschot, D. E. (2003). The number, size, and type of axons in rat subcortical white matter on left and right sides: A stereological, ultrastructural study. Journal of Neurocytology, 32, 1165-1179.

Galvin, K. A., & Oorschot, D. E. (2003). Continuous low-dose treatment with brain-derived neurotrophic factor or neurotrophin-3 protects striatal medium spiny neurons from mild neonatal hypoxia/ischemia: A stereological study. Neuroscience, 118, 1023-1032.

Tunstall, M., Oorschot, D. E., Kean, A., & Wickens, J. (2002). Inhibitory interactions between spiny projection neurons in the rat striatum. Journal of Neurophysiology, 10, 1263-1269.

Oorschot, D. E., Black, M. J., Rangi, F., & Scarr, E. (2000). Is Fos protein expressed by dying striatal neurons after immature hypoxic-ischemic brain injury? Experimental Neurology, 161, 227-233.

Jones, K. R., & Oorschot, D. E. (1998). Do aluminium and/or glutamate induce Alz-50 reactivity? A light microscopic immunohistochemical study. Journal of Neurocytology, 27, 45-57.

Jones, K. R., Black, M. J., & Oorschot, D. E. (1998). Do aluminium and/or glutamate induce Alzheimer PHF-like formation? An electron microscopic study. Journal of Neurocytology, 27, 59-68.

Galvin, K. A., & Oorschot, D. E. (1998). Postinjury magnesium sulfate treatment is not markedly neuroprotective for striatal medium spiny neurons after perinatal hypoxia/ischemia in the rat. Pediatric Research, 44, 740-745.

Oorschot, D. E., & McLennan, I. S. (1998). The trophic requirements of mature motoneurons. Brain Research, 789, 315-321.

Oorschot, D. E. (1996). Total number of neurons in the neostriatal, pallidal, subthalamic, and substantia nigral nuclei of the rat basal ganglia: a stereological study using the Cavalieri and optical disector methods. Journal of Comparative Neurology, 366, 580-599.

Stuart, D., & Oorschot, D. E. (1995). Embedding, sectioning, immunocytochemical and stereological methods that optimise research on the lesioned adult rat spinal cord. Journal of Neuroscience Methods, 61, 5-14.

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