Dr Lee-Anne Morris

2026

Journal - Research Article

Morris, L.-A., Suzuki, H., Lee, S., Jin, Z., Chen, B. B., Marin, A., … Le Heron, C. J., & Vanegas-Arroyave, N. (2026). Apathy, effort-based decisions and brain integrity in Alzheimer's and Parkinson's diseases. Brain, 149(5), 1635-1649. doi: 10.1093/brain/awaf393

2025

Journal - Research Article

Morris, L.-A., Horne, K.-L., Paermentier, L., Buchanan, C., Myall, D., Manohar, S., … Anderson, T., … Le Heron, C. (2025). Decision context and neurobehavioural disturbance in Huntington's disease. Cognitive, Affective & Behavioral Neuroscience. Advance online publication. doi: 10.3758/s13415-025-01359-0

Morris, L.-A., Manohar, S., Horne, K.-L., Paermentier, L., Buchanan, C. M., MacAskill, M. J., Myall, D. J., … Anderson, T. J., & Le Heron, C. J. (2025). Goal-directedness deficit in Huntington's disease. Cognitive, Affective & Behavioral Neuroscience, 25, 1596-1609. doi: 10.3758/s13415-025-01313-0

Le Heron, C., Morris, L.-A., & Manohar, S. (2025). Understanding disrupted motivation in Parkinson's disease through a value-based decision-making lens [Review]. Trends in Neurosciences, 48(4), 297-311. doi: 10.1016/j.tins.2025.02.008

Morris, L.-A., Horne, K.-L., Manohar, S., Paermentier, L., Buchanan, C. M., MacAskill, M., Myall, D., … Anderson, T., & Le Heron, C. (2025). Disrupted time perception underlies motivational disturbances in Huntington's disease. Timing & Time Perception, 13, 347-370. doi: 10.1163/22134468-bja10115

Morris, L.-A., Horne, K.-L., Manohar, S., Paermentier, L., Buchanan, C., MacAskill, M., Myall, D., … Anderson, T., … Le Heron, C. (2025). Decision cost hypersensitivity underlies Huntington’s disease apathy. Brain, 148, 861-874. doi: 10.1093/brain/awae296

Journal - Research Other

Gazes, Y., Suzuki, H., Morris, L.-A., Lee, S., Jin, Z., Huey, E. D., … Le Heron, C., … Vanegas-Arroyave, N. (2025). A transdiagnostic, multi-modal approach to understanding apathy: Methodological and analytical framework. NeuroImage: Reports, 5(4), 100289. doi: 10.1016/j.ynirp.2025.100289

Conference Contribution - Published proceedings: Abstract

Morris, L.-A., Manohar, S., Horne, K.-L., Paermentier, L., Buchanan, C. M., MacAskill, M., Myall, D. J., … Anderson, T. J., & Le Heron, C. J. (2025). Goal-directedness deficit in Huntington's disease [Poster presentation]. Alzheimer's & Dementia, 21(Suppl. 3), e105286. doi: 10.1002/alz70857_105286

Morris, L.-A., Suzuki, H., Lee, S., Jin, Z., Gazes, Y., Huey, E. D., … Le Heron, C. J., & Vanegas, N. (2025). Amotivation associated with altered latent effort-based decision-making processes in Alzheimer's and Parkinson's disease [Poster presentation]. Alzheimer's & Dementia, 21(Suppl. 3), e105243. doi: 10.1002/alz70857_105243

Morris, L.-A., Horne, K.-L., Manohar, S., Paermentier, L., Buchanan, C., MacAskill, M., Myall, D., … Anderson, T., … Le Heron, C. (2025). Decision cost hypersensitivity underlies Huntington's disease apathy. In A. Banstola (Ed.), Proceedings of the 41st International Australasian Winter Conference on Brain Research (AWCBR). 13.6, (pp. 75). Retrieved from https://www.awcbr.org

Horne, K.-L., Slater, N. M., Holden, A., Morris, L.-A., MacAskill, M. R., Lewis, S. J. G., Myall, D., Pitcher, T., Dalrymple-Alford, J., Anderson, T., Melzer, T., & Le Heron, C. (2025). The structural integrity of nucleus basalis of Meynert and its association with hallucinations in Parkinson's disease. In A. Banstola (Ed.), Proceedings of the 41st International Australasian Winter Conference on Brain Research (AWCBR). 13.4, (pp. 73). Retrieved from https://www.awcbr.org

Muir, E., Morris, L.-A., & Le Heron, C. (2025). The mechanisms by which cholinesterase inhibitors improve apathy in dementia. In A. Banstola (Ed.), Proceedings of the 41st International Australasian Winter Conference on Brain Research (AWCBR). 11.25, (pp. 67). Retrieved from https://www.awcbr.org

2024

Journal - Research Article

Morris, L.-A., Horne, K.-L., Paermentier, L., Buchanan, C. M., MacAskill, M., Myall, D., … Anderson, T., & Le Heron, C. (2024). Apathy and impulsivity co-occur in Huntington's disease. Brain & Behavior, 14(10). doi: 10.1002/brb3.70061

Awarded Doctoral Degree

Morris, L.-A. (2024). Cognitive and neural mechanisms underlying apathy in Huntington's disease and Parkinson's disease (PhD). University of Otago, Dunedin, New Zealand. Retrieved from https://hdl.handle.net/10523/42276

2023

Journal - Research Article

Morris, L.-A., Harrison, S. J., Melzer, T. R., Dalrymple-Alford, J. C., Anderson, T. J., MacAskill, M. R., & Le Heron, C. J. (2023). Altered nucleus accumbens functional connectivity precedes apathy in Parkinson's disease. Brain, 146, 2739-2752. doi: 10.1093/brain/awad113

Conference Contribution - Published proceedings: Abstract

Morris, L.-A., Harrison, S., Melzer, T., Dalrymple-Alford, J., Anderson, T., MacAskill, M., & Le Heron, C. (2023). Altered nucleus accumbens functional connectivity precedes apathy in Parkinson's disease. Movement Disorders, 38(1), 1589. doi: 10.1002/mds.29546

Morris, L.-A., Horne, K., Paermentier, L., Buchanan, C., MacAskill, M., Myall, D., … Anderson, T., & Le Heron, C. (2023). Apathy and impulsivity co-occur in Huntington's disease. Movement Disorders, 38(1), 893. doi: 10.1002/mds.29542

Morris, L.-A., Horne, K.-L., Paermentier, L., Buchanan, C., MacAskill, M., Myall, D., … Anderson, T., & Le Heron, C. (2023). Dissociable sensitivity to effort and delay costs underlies apathy and impulsivity in Huntington's disease. Proceedings of the Society for NeuroEconomics (SNE) Annual Conference. P2-E-14. Retrieved from https://neuroeconomics.org/

Horne, K.-L., Harrison, S. J., Slater, N. M., Morris, L.-A., Myall, D. J., Melzer, T. R., Pitcher, T. L., Dalrymple-Alford, J. C., Anderson, T. J., & Le Heron, C. (2023). Understanding the development of anxiety over the disease course in Parkinson's disease. In K.-L. Horne (Ed.), Proceedings of the 39th International Australasian Winter Conference on Brain Research (AWCBR). (pp. 30). Retrieved from https://www.awcbr.org

Other Research Output

Morris, L-A. (2023, August). Understanding apathy: Insights from neurological disease. Department of Psychology Seminar, University of Otago, Dunedin, New Zealand. [Department Seminar].

2022

Journal - Research Other

Morris, L.-A., O'Callaghan, C., & Le Heron, C. (2022). Disordered decision making: A cognitive framework for apathy and impulsivity in Huntington's disease. Movement Disorders, 37(6), 1149-1163. doi: 10.1002/mds.29013

Conference Contribution - Published proceedings: Abstract

Morris, L.-A., Harrison, S., MacAskill, M., Anderson, T., Melzer, T., Dalrymple-Alford, J., & Le Heron, C. (2022). Altered nucleus accumbens functional connectivity predicts apathy development in Parkinson's disease. In K. Horne (Ed.), Proceedings of the 38th International Australasian Winter Conference on Brain Research (AWCBR). (pp. 42). Retrieved from https://www.queenstownresearchweek.org

2021

Journal - Research Article

Walker, G., Morris, L.-A., Christensen, H., Mirheidari, B., Reuber, M., & Blackburn, D. J. (2021). Characterising spoken responses to an intelligent virtual agent by persons with mild cognitive impairment. Clinical Linguistics & Phonetics, 35(3), 237-252. doi: 10.1080/02699206.2020.1777586

2020

Conference Contribution - Published proceedings: Abstract

O'Malley, R., Morris, L.-A., Longden, C., Turner, A., Walker, T., Venneri, A., … Blackburn, D. (2020). Can an automated assessment of language help distinguish between functional cognitive disorder and early neurodegeneration? Journal of Neurology, Neurosurgery & Psychiatry, 91(8), (pp. e18-e19). doi: 10.1136/jnnp-2020-BNPA.43