Maiya R. Geddes, MD, PhD

Maiya R. Geddes, MD, PhD
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Email address: 
maiya.geddes [at]
Cognitive Disorders

Dr. Geddes is a clinician scientist and an assistant professor in the Department of Neurology and Neurosurgery at McGill University.

Dr. Geddes obtained an MD at the University of British Columbia, before completing a residency in adult neurology at McGill University. She completed a CIHR-funded postdoctoral research fellowship at the McGovern Institute for Brain Research at the Massachusetts Institute of Technology.

Dr. Geddes obtained subspecialty clinical fellowship training in behavioural neurology and neuropsychiatry at the Center for Brain/Mind Medicine at the Brigham and Women’s Hospital and Harvard Medical School where she then joined the faculty in 2017.

Disorders of motivation are pervasive in human aging and cause profound disability and functional decline. The goal of Dr. Geddes’ research program is to determine the brain mechanisms underlying the interaction between motivation and cognition in aging. To address this goal, she applies a converging methods approach that combines cutting-edge behavioural and multi-modal neuroimaging techniques including task-based and resting-state functional magnetic resonance imaging (fMRI). This new knowledge will impact the development of neurobiologically-informed techniques to engage older adults in critical health behaviours. In addition, these findings will provide novel therapeutic targets for the personalized treatment of motivational disorders in aging and neurological disease.

Dr. Geddes has received recognition for her research including a Career Development Award from the American Neuropsychiatric Association and a Future Leader Award from the Canadian Conference on Dementia. Her research program is funded by the National Institutes of Health.

Selected publications: 


Geddes MR, Mattfeld AT, de los Angeles C, Keshavan A, Gabrieli JDE. (2018). Human aging reduces the neurobehavioral influence of motivation on episodic memory. NeuroImage 171, 296 - 310.

Arnold Anteraper S, Whitfield-Gabrieli S, Triantafyllou C, Mattfeld A, Gabrieli J, Geddes MR (2018). Resting state functional connectivity of the subthalamic nucleus to limbic, associative and motor networks. Brain Connectivity 8(1), 22-32.

Geddes MR, Dreyblatt A, Koehler AC (2017). Connectivity chorus. In: Schwaegermann MM, Ely K (Eds.), Infinite record: archive, memory, performance. Brooklyn Arts Press, Brooklyn.

Geddes MR, Tie Y, Gabrieli JDE, McGinnis SM, Golby A, Whitfield-Gabrieli S (2016). Altered functional connectivity in lesional peduncular hallucinosis with REM sleep behavior disorder. Cortex 74, 96 – 106

Geddes MR (2015). Memory and mechanism. Neurology 85, 1180

Geddes MR, Tsuchida A, Swick D, Ashley V, Fellows LK (2014). Material-specific interference control is dissociable and lateralized in human prefrontal cortex. Neuropsychologia 64, 310-319

Geddes MR, Sinnreich M, Chalk C (2010). Minocycline-induced dermatomyositis. Muscle Nerve 41, 547-549

Geddes MR (2006). A break near SLITRK1, a breakthrough in Tourette syndrome. Clin. Genet. 69, 206-208

Research areas: 
Cognitive Neuroscience

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