Dr Daniel Myall

BSc (Hons), PhD

Mathematician

New Zealand Brain Research Institute, Christchurch

Phone: 033786083

At the Institute I get involved with the computational, mathematical, and statistical aspects of research. 

My formal training is in mathematics and for my PhD I developed a virtual environment platform and used it to examine motor adaptation in Parkinson's disease. My research now focuses on developing predictive models for pre-clinical detection of cognitive decline in Parkinson's disease. My areas of interest include computational neuroscience, models of learning, machine learning, Bayesian statistics, and automation of network monitoring and management.

When not working my three children keep me busy. I also like going hiking and mountain biking around the Canterbury Foothill Forests.

 

Publications

Provided on request for non-commercial personal use by researchers.

2016

Download Metabolite ratios in the posterior cingulate cortex do not track cognitive decline in Parkinson's disease in a clinical setting.
Almuqbel, M., Melzer, T.R., Myall, D.J., MacAskill, M.R., Pitcher, T.L., Livingston, L., Wood, K., Keenan, R.J., Dalrymple-Alford, J.C., Anderson, T.J. (2016). Metabolite ratios in the posterior cingulate cortex do not track cognitive decline in Parkinson's disease in a clinical setting. Parkinsonism & Related Disorders, 22, 54-61. 10.1016/j.parkreldis.2015.11.008
Download Different PD-MCI criteria and risk of dementia in Parkinson’s disease: Four year longitudinal study.
Wood, K., Myall, D.J., Livingston, L., Melzer, T.R., Pitcher, T.L., MacAskill, M.R., Geurtsen, G.J., Anderson, T.J., Dalrymple-Alford, J.C. (2016). Different PD-MCI criteria and risk of dementia in Parkinson’s disease: Four year longitudinal study. npj Parkinson's Disease, 2, 15027. 10.1038/npjparkd.2015.27

2015

Download Construction of joint confidence regions for the optimal true class fractions of Receiver Operating Characteristic (ROC) surfaces and manifolds.
Bantis, L. E., Nakas, C. T., Reiser, B., Myall, D., Dalrymple-Alford, J. C. (2015). Construction of joint confidence regions for the optimal true class fractions of Receiver Operating Characteristic (ROC) surfaces and manifolds. Statistical methods in medical research, 096228021558169. 10.1177/0962280215581694
Download Tracking Parkinson's disease over one year with multimodal magnetic resonance imaging in a group of older patients with moderate disease.
Melzer, T.R., Myall, D.J., MacAskill, M.R., Pitcher, T.L., Livingston, L., Watts, R., Keenan, R.J., Dalrymple-Alford, J.C., Anderson, T.J. (2015). Tracking Parkinson's disease over one year with multimodal magnetic resonance imaging in a group of older patients with moderate disease. PLOS ONE, 10, e0143923. 10.1371/journal.pone.0143923

2014

Download Comparing cerebral perfusion in Alzheimer's disease and Parkinson's disease dementia: an ASL-MRI study.
Le Heron, C. J., Wright, S. L., Melzer, T. R., Myall, D. J., MacAskill, M. R., Livingston, L., Keenan, R. J., Watts, R., Dalrymple-Alford, J. C. , Anderson, T.J. (2014). Comparing cerebral perfusion in Alzheimer's disease and Parkinson's disease dementia: an ASL-MRI study.  Journal of Cerebral Blood Flow & Metabolism, 34, 964-970. 10.1038/jcbfm.2014.40
Download Comparison of cognitive and UHDRS measures in monitoring disease progression in Huntington's disease: a 12-month longitudinal study.
Toh, E., MacAskill, M., Dalrymple-Alford, J., Myall, D., Livingston, L., Macleod, S. , Anderson, T. (2014). Comparison of cognitive and UHDRS measures in monitoring disease progression in Huntington's disease: a 12-month longitudinal study.  Translational Neurodegeneration,  3.

2013

Download "Ocular Tremor" in Parkinson’s Disease: A Technology-dependent Artifact of Universal Head Motion?
MacAskill, M., Myall, D. , Anderson, T. (2013). "Ocular Tremor" in Parkinson’s Disease: A Technology-dependent Artifact of Universal Head Motion? Movement Disorders, 28, 1165-1166. 10.1002/mds.25602
Download Cross-Sectional Area of the Anterior Belly of the Digastric Muscle: Comparison of MRI and Ultrasound Measures.
Macrae, P., Jones, R., Myall, D., Melzer, T. , Huckabee, M. (2013). Cross-Sectional Area of the Anterior Belly of the Digastric Muscle: Comparison of MRI and Ultrasound Measures. Dysphagia, 28, 375-380. 10.1007/s00455-012-9443-8
Download A perceptual discrimination task results in greater facilitation of voluntary saccades in Parkinson’s disease patients.
van Stockum, S., MacAskill, M. R., Myall, D., Anderson, T. J. (2013). A perceptual discrimination task results in greater facilitation of voluntary saccades in Parkinson’s disease patients. European Journal of Neuroscience, 37(1), 163-172. 10.1111/ejn.12033

2012

Download The influence of motor and cognitive impairment upon visually-guided saccades in Parkinson’s disease.
MacAskill, M. R., Graham, C. F., Pitcher, T. L., Myall, D. J., Livingston, L., van Stockum, S., Dalrymple-Alford, J. C., Anderson, T. J. (2012). The influence of motor and cognitive impairment upon visually-guided saccades in Parkinson’s disease. Neuropsychologia, 50, 3338-3347. 10.1016/j.neuropsychologia.2012.09.025

2011

Download Pharyngeal pressures during swallowing within and across 3 sessions: within-subject variance and order effects.
Macrae, P. R., Myall, D. J., Jones, R. D. , Huckabee, M. (2011). Pharyngeal pressures during swallowing within and across 3 sessions: within-subject variance and order effects. Dysphagia, 26, 385-391. 10.1007/s00455-010-9324-y
Download A perceptual discrimination task abnormally facilitates reflexive saccades in Parkinson's disease.
van Stockum, S., MacAskill, M. R., Myall, D. , Anderson, T.J. (2011). A perceptual discrimination task abnormally facilitates reflexive saccades in Parkinson's disease.  European Journal of Neuroscience,  33, 2091-2100. 10.1111/j.1460-9568.2011.07697.x

2008

Download Design of a modular and low-latency virtual-environment platform for applications in motor adaptation research, neurological disorders, and neurorehabilitation.
Myall, D. J., MacAskill, M. R., Davidson, P. R., Anderson, T. J. , Jones, R.D. (2008). Design of a modular and low-latency virtual-environment platform for applications in motor adaptation research, neurological disorders, and neurorehabilitation.  IEEE Transactions on Neural Systems and Rehabilitation Engineering,  16, 298-309. r 10.1109/TNSRE.2008.922676

Abstracts and Short papers

2016

Horne, K, Myall, DJ, Livingston, L, Grenfell, SF, Melzer, TR, Pitcher, TL, MacAskill, MR, Anderson, TJ, Dalrymple-Alford, JC (2016). Risk of dementia in Parkinson’s disease: Towards optimal short cognitive testing.  Proceedings of the 34th International Winter Conference on Brain Research, 1.
Melzer, TR, Keenan, RJ, Myall, DJ, Kaur, G, Livingston, L, Horne, K, Marsh, S, MacAskill, MR, Dalrymple-Alford, JC, Anderson, TJ (2016). Amyloid imaging and cognition in Parkinson’s disease: Interim report.  Proceedings of the 34th International Winter Conference on Brain Research, 3.
Myall, DJ, Pitcher, TL, MacAskill, MR, Pearson, JF, Lacey, C, Dalrymple-Alford, J C, Anderson, T J (2016). Epidemiology of Parkinson’s in New Zealand: Sex, age, and future burden.  Proceedings of the 34th International Winter Conference on Brain Research,  34, 10, 4.
Pitcher, TL, Myall, DJ, MacAskill, MR, Pearson, JF, Lacey, C, Dalrymple-Alford, J C, Anderson, T J (2016). Ethnic and regional differences in Parkinson’s disease in New Zealand.  Proceedings of the 34th International Winter Conference on Brain Research, 5.

2015

Almuqbel, M, Melzer, TR, Myall, DJ, MacAskill, MR, Livingston, L, Pitcher, TL, Dalrymple-Alford, JC, Anderson, TJ (2015). Longitudinal magnetic resonance spectroscopy in Parkinson’s disease. Proceedings of the 21st Annual Meeting of the Organization for Human Brain Mapping.
Melzer, TR, Myall, DJ, MacAskill, MR, Livingston, L, Pitcher, TL, Watts, R, Keenan, RJ, Dalrymple-Alford, JC, Anderson, TJ (2015). White matter lesions contribute to future dementia in Parkinson’s disease. Proceedings of the 21st Annual Meeting of the Organization for Human Brain Mapping.

2014

Almuqbel, M., Melzer, T., Myall, D., MacAskill, M., Livingston, L., Wood, K., Pitcher, T., Dalrymple-Alford, J. , Anderson, T. (2014). Cognitive status in Parkinsons disease characterised by magnetic resonance spectroscopy.  Proceedings of the International Australasian Winter Conference on Brain Research (AWCBR), Queenstown, New Zealand,  32, 34.
Melzer, T., Myall, D., Livingston L., , Wood, K., Pitcher, T., Keenan, R., MacAskill, M., Dalrymple-Alford, J. , Anderson, T. (2014). White matter lesions - a factor in developing dementia in patients with Parkinsons disease.  Proceedings of the International Australasian Winter Conference on Brain Research (AWCBR), Queenstown, New Zealand, 32, Abstract 3.5.
Myall, D., Wood, K., Livingston, L., Pitcher, T., Melzer, T., MacAskill, M., Anderson, T. , Dalrymple-Alford, J. (2014). Individualised medicine: Predicting dementia in Parkinsons disease.  Proceedings of the International Australasian Winter Conference on Brain Research (AWCBR), Queenstown, New Zealand,  32, Abstract 8.1.
Wood, K., Myall, D., Livingston, L., Melzer, T., Pitcher, T., MacAskill, M., Anderson, T. , Dalrymple-Alford, J. (2014). Comparing mild cognitive impairment criteria in Parkinsons disease: influence on dementia onset.  Proceedings of the International Australasian Winter Conference on Brain Research (AWCBR), Queenstown, New Zealand, 32, Abstract 6.4.

2013

Alamri, Y., MacAskill, M., Myall, D., Dalrymple-Alford, J., & Anderson, T. (2013). Animal-naming in Parkinson's disease (Abstract). 2013 Neuroscience Meeting Planner San Diago, CA: Society for, 431, Program No.10/N5..
MacAskill, M., Alamri, Y., Myall, D., Dalrymple-Alford, J., Anderson, T. (2013). Tea with milk and sugar: gaze and action coordination in a real-world task in Parkinsons disease (Abstract). Proceedings of the 17th European Conference on Eye Movement Research, Lund, Journal of Eye Movement Research, 6(3), 512.
Toh, E., MacAskill, M., Dalrymple-Alford, J., Myall, D., MacLeod, S., Livingston, L. , Anderson, T. (2013). Progression in cognitive function of Huntington patients relative to controls: a 12 months study. Proceedings of the Movement Disorders Society 17th International Congress, Sydney, Movement Disorders, 28 Supplement 1, Abstract 760 .
Toh, E., MacAskill, M., Dalrymple-Alford, J., Myall, D., MacLeod, S., Livingston, L. , Anderson, T. (2013). Proceedings of the Movement Disorders Society 17th International Congress, Sydney,  Movement Disorders, 28 Supplement 1, Abstract 758.

2012

Toh, E., MacAskill, M., Dalrymple-Alford, J., Myall, D., Livingston, L., MacLeod, A. , Anderson, T. (2012). Impairment of implicit prediction in rhythmic saccadic movement in symptomatic huntington patients (Abstract). Journal of Neurology, Neurosurgery, and Psychiatry, 83:Suppl 1, A34. 10.1136/jnnp-2012-303524.104
Toh, E., MacAskill, M., Dalrymple-Alford, J., Myall, D., Livingston, L., Ross, J., Anderson, T. (2012). The effectiveness of cognitive and reflexive saccade measures in discriminating Huntingtons disease from healthy controls (Abstract).  European Journal of Neurology, 19 Suppl 1, Poster 1661. 10.1111/j.1468-1331.2012.03888.x

2008

Download Submovements in visually-guided and memory-guided reaching tasks: changes in Parkinson’s disease.
Myall, D. J., MacAskill, M. R., Anderson, T. J., Jones, R. D. (2008). Submovements in visually-guided and memory-guided reaching tasks: changes in Parkinson’s disease. In Proceedings of the 30th Annual International Conference of IEEE Engineering in Medicine and Biology Society.