SR
Sephira Ryman
Parkinson DiseaseBrainBrain ConcussionCognitionfMRIParkinson's diseaseCerebrovascular CirculationBiomarkersCognitive DysfunctionCOVID-19
On Valency
published · living versionsW_mtab3jgh·v1 · currentpublished
MIGRAINE: MRI Graph Reliability Analysis and Inference for Connectomics
with William Gray Roncal, Zachary H. Koterba, Disa Mhembere, Dean M. Kleissas +8
1 version
Preprints & journals
67 papers in the corpus · 2012–2026Oscillating hypercapnia induces neural abundant protein efflux and potential depletion in health and chronic traumatic brain injury.42206757 · Mayer, Andrew R, Wick, Tracey V, Nathaniel, Upasana et al.2026 · 0 citationsJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 2026;46(10):2711-2724
Explanatory limitations of CSF, plasma, and MRI biomarkers for inflammation and blood-brain barrier disruption in dementia.42798633 · Golduzian, Azadeh, Erhardt, Erik B, Caprihan, Arvind et al.2026 · 0 citationsFrontiers in aging. 2026;7:1923046
Development and validation of a harmonized memory score for multicenter Alzheimer's disease and related dementia research.42298651 · Sanderson-Cimino, Mark, Gross, Alden L, Gaynor, Leslie S et al.2026 · 2 citationsAlzheimer's research & therapy. 2026;18(1)
Cerebrovascular recovery drives restoration of neurometabolite levels after mild COVID-19.42036992 · Coe, Devin B, Branzoli, Francesca, Shaff, Nicholas et al.2026 · 0 citationsJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 2026;46(9):2339-2352
"When the Worlds Change and We Get Old": Indigenous Older Adults Reflecting on Dementia and Aging.42354250 · Ginossar, Tamar, Partridge, Erika L, Adair, John C et al.2026 · 0 citationsInternational journal of environmental research and public health. 2026;23(6)
Computing Scalable Multivariate Glocal Invariants of Large (Brain-) Graphs1312.4318v1 · Disa Mhembere, William Gray Roncal, Daniel Sussman et al.2013 · 21 citationsarXiv
Oscillating Hypercapnia Induces Neural Abundant Protein Efflux and Potential Depletion in Health and Chronic Traumatic Brain Injury10.64898/2026.04.09.717306v1 · Mayer, A. R., Wick, T., Nathaniel, U. et al.2026 · 0 citationsbioRxiv
Albuminuria, cognition, and MRI biomarkers of cerebrovascular disease in American Indians of the Zuni Pueblo.36483475 · Ryman, Sephira G, Caprihan, Arvind, Rosenberg, Gary et al.2026 · 2 citationseNeurologicalSci. 2022;29:100438
Harnessing brain rhythms to activate the glymphatic pathway via controlled breathing and intermittent CO2.41355053 · Vakhtin, Andrei A, Lin, Henry C, Pirio Richardson, Sarah E et al.2026 · 4 citationsJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 2026;46(2):444-455
Considerations for disclosing Alzheimer's disease risk and biomarker results in a Pueblo community in Southwest United States.41623897 · Ryman, Sephira, Edwards, Katherine, Ginossar, Tamar et al.2026 · 1 citationAlzheimer's & dementia (Amsterdam, Netherlands). 2026;18(1):e70250
Sulfate reducing bacteria induce α-synuclein in intestinal and neuronal cells and tissues and inhibit tyrosine hydroxylase in neuronal cells.41488327 · Singh, Sudha B, Capacio, Arianne J, Braun, Cody A et al.2026 · 0 citationsFrontiers in neuroscience. 2025;19:1672793
The influence of intermittent hypercapnia on cerebrospinal fluid flow and clearance in Parkinson's disease and healthy older adults.41271795 · Erhardt, Erik B, Mayer, Andrew R, Lin, Henry C et al.2025 · 8 citationsNPJ Parkinson's disease. 2025;11(1):334
Language Dominance and Education Considerations in the Neuropsychological Assessment of Southwestern American Indians Using the National Alzheimer Coordinating Center's Uniform Data Set Version 3.40346835 · Ryman, Sephira G, Verney, Steven P, Quam, Michelle et al.2025 · 1 citationAlzheimer disease and associated disorders. 2025;39(2):75-81
Dopaminergic modulation and dosage effects on brain state dynamics and working memory component processes in Parkinson's disease.40069154 · Lee, Byeongwook, Young, Christina B, Cai, Weidong et al.2025 · 14 citationsNature communications. 2025;16(1):2433
Trajectories of intrinsic connectivity one year post pediatric mild traumatic brain injury: Neural injury superimposed on neurodevelopment.39855053 · van der Horn, Harm J, Wick, Tracey V, Ling, Josef M et al.2025 · 4 citationsCortex; a journal devoted to the study of the nervous system and behavior. 2025;184:120-130
Alterations of cerebrovascular reactivity following pediatric mild traumatic brain injury are independent of neurodevelopmental changes.39113416 · van der Horn, Harm Jan, Dodd, Andrew B, Wick, Tracey V et al.2025 · 2 citationsJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 2025;45(1):125-139
Development and validation of a harmonized memory score for multicenter Alzheimer's disease and related dementia research10.1101/2025.03.31.25324964v1 · Sanderson-Cimino, M., Gross, A. L., Gaynor, L. S. et al.2025 · 2 citationsmedRxiv
Parkinson's disease cerebrovascular reactivity pattern: A feasibility study.38578669 · van der Horn, Harm Jan, Vakhtin, Andrei A, Julio, Kayla et al.2024 · 13 citationsJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 2024;44(10):1774-1786
Diffusion magnetic resonance spectroscopy captures microglial reactivity related to gut-derived systemic lipopolysaccharide: A preliminary study.39163909 · Birg, Aleksandr, van der Horn, Harm J, Ryman, Sephira G et al.2024 · 7 citationsBrain, behavior, and immunity. 2024;122:345-352
Abnormal Cerebrovascular Activity, Perfusion, and Glymphatic Clearance in Lewy Body Diseases.38817039 · Ryman, Sephira G, Vakhtin, Andrei A, Mayer, Andrew R et al.2024 · 22 citationsMovement disorders : official journal of the Movement Disorder Society. 2024;39(8):1258-1268
Blood-Brain Barrier Permeability Is Associated With Cognitive Functioning in Normal Aging and Neurodegenerative Diseases.38979810 · Hergert, Danielle C, Gaasedelen, Owen, Ryman, Sephira G et al.2024 · 21 citationsJournal of the American Heart Association. 2024;13(14):e034225
Subthalamic nucleus-language network connectivity predicts dopaminergic modulation of speech function in Parkinson's disease.38768342 · Cai, Weidong, Young, Christina B, Yuan, Rui et al.2024 · 13 citationsProceedings of the National Academy of Sciences of the United States of America. 2024;121(22):e2316149121
A cautionary tale on the effects of different covariance structures in linear mixed effects modeling of fMRI data.38726907 · van der Horn, Harm Jan, Erhardt, Erik B, Dodd, Andrew B et al.2024 · 3 citationsHuman brain mapping. 2024;45(7):e26699
Specific White Matter Tracts and Diffusion Properties Predict Conversion From Mild Cognitive Impairment to Alzheimer's Disease.34366830 · Stone, David B, Ryman, Sephira G, Hartman, Alexandra P et al.2024 · 29 citationsFrontiers in aging neuroscience. 2021;13:711579
Gut-brain pathogenesis of post-acute COVID-19 neurocognitive symptoms.37841680 · Plummer, Allison M, Matos, Yvette L, Lin, Henry C et al.2024 · 35 citationsFrontiers in neuroscience. 2023;17:1232480
A low-resource reliable pipeline to democratize multi-modal connectome estimation and analysis10.1101/2021.11.01.466686v2 · Chung, J., Lawrence, R., Loftus, A. et al.2021 · 3 citationsbioRxiv
Comprehensive proteomics of CSF, plasma, and urine identify DDC and other biomarkers of early Parkinson's disease.38467937 · Rutledge, Jarod, Lehallier, Benoit, Zarifkar, Pardis et al.2024 · 109 citationsActa neuropathologica. 2024;147(1):52
Amplitude-determined seizure-threshold, electric field modeling, and electroconvulsive therapy antidepressant and cognitive outcomes.38212442 · Abbott, Christopher C, Miller, Jeremy, Farrar, Danielle et al.2024 · 16 citationsNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology. 2024;49(4):640-648
Longitudinal hippocampal subfields, CSF biomarkers, and cognition in patients with Parkinson disease.38107672 · Erhardt, Erik, Horner, Anna, Shaff, Nicholas et al.2024 · 6 citationsClinical parkinsonism & related disorders. 2023;9:100199
Comparison of automated and manual quantification methods for neuromelanin-sensitive MRI in Parkinson's disease.38041476 · Shaff, Nicholas, Erhardt, Erik, Nitschke, Stephanie et al.2024 · 5 citationsHuman brain mapping. 2024;45(1):e26544
Dynamic Functional Connectivity in Pediatric Mild Traumatic Brain Injury.38016527 · van der Horn, Harm J, Ling, Josef M, Wick, Tracey V et al.2024 · 24 citationsNeuroImage. 2024;285:120470
Lesion network mapping of eye-opening apraxia.37953849 · Zarifkar, Pardis, Shaff, Nicholas A, Nersesjan, Vardan et al.2023 · 8 citationsBrain communications. 2023;5(6):fcad288
Multifaceted neural and vascular pathologies after pediatric mild traumatic brain injury.37724718 · Mayer, Andrew R, Dodd, Andrew B, Robertson-Benta, Cidney R et al.2023 · 4 citationsJournal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism. 2024;44(1):118-130
Neural correlates of cognitive control deficits in pediatric mild traumatic brain injury.37800467 · van der Horn, Harm J, Dodd, Andrew B, Wick, Tracey V et al.2023 · 17 citationsHuman brain mapping. 2023;44(17):6173-6184
Reduced and Delayed Cerebrovascular Reactivity in Patients with Parkinson's Disease.37157056 · Ryman, Sephira G, Shaff, Nicholas, Dodd, Andrew et al.2023 · 22 citationsMovement disorders : official journal of the Movement Disorder Society. 2023;38(7):1262-1272
Illusory Responses across the Lewy Body Disease Spectrum.36511519 · Shahid, Marian, Rawls, Ashley, Ramirez, Veronica et al.2023 · 19 citationsAnnals of neurology. 2023;93(4):702-714
Microbiome-gut-brain dysfunction in prodromal and symptomatic Lewy body diseases.36355185 · Ryman, Sephira, Vakhtin, Andrei A, Richardson, Sarah Pirio et al.2023 · 38 citationsJournal of neurology. 2023;270(2):746-758
Dopaminergic medication normalizes aberrant cognitive control circuit signalling in Parkinson's disease.35357463 · Cai, Weidong, Young, Christina B, Yuan, Rui et al.2022 · 11 citationsBrain : a journal of neurology. 2022;145(11):4042-4055
Aromatic L-Amino Acid Decarboxylase is a novel fluid biomarker of Parkinson's disease10.1101/2022.11.09.22282149v1 · Rutledge, J., Lehallier, B., Zarifkar, P. et al.2022 · 2 citationsmedRxiv
Ictal Theta Power as an Electroconvulsive Therapy Safety Biomarker: A Pilot Study.35613008 · Miller, Jeremy, Jones, Tom, Upston, Joel et al.2022 · 18 citationsThe journal of ECT. 2022;38(2):88-94
Cognitive control in Parkinson's disease.35248192 · Cavanagh, James F, Ryman, Sephira, Richardson, Sarah Pirio2022 · 11 citationsProgress in brain research. 2022;269(1):137-152
Latent brain state dynamics and cognitive flexibility in older adults.34627994 · Lee, Byeongwook, Cai, Weidong, Young, Christina B et al.2022 · 37 citationsProgress in neurobiology. 2022;208:102180
Is the prefrontal cortex organized by supramodal or modality-specific sensory demands during adolescence?34419765 · Sicard, V, Stephenson, D D, Dodd, A B et al.2021 · 5 citationsDevelopmental cognitive neuroscience. 2021;51:101006
Differing functional mechanisms underlie cognitive control deficits in psychotic spectrum disorders.32869961 · Stephenson, David D, El Shaikh, Ansam A, Shaff, Nicholas A et al.2021 · 9 citationsJournal of psychiatry & neuroscience : JPN. 2020;45(6):430-440
Cognition at Each Stage of Lewy Body Disease with Co-occurring Alzheimer's Disease Pathology.33646154 · Ryman, Sephira G, Yutsis, Maya, Tian, Lu et al.2021 · 59 citationsJournal of Alzheimer's disease : JAD. 2021;80(3):1243-1256
Right prefrontal intermittent theta-burst stimulation for major depressive disorder: A case series.33242610 · Quinn, Davin K, Jones, Thomas R, Upston, Joel et al.2021 · 7 citationsBrain stimulation. 2021;14(1):97-99
The clinical relevance of gray matter atrophy and microstructural brain changes across the psychosis continuum.33607607 · Hanlon, Faith M, Dodd, Andrew B, Ling, Josef M et al.2021 · 20 citationsSchizophrenia research. 2021;229:12-21
Evidence for asymmetric inhibitory activity during motor planning phases of sensorimotor synchronization.32554227 · Mayer, Andrew R, Hanlon, Faith M, Shaff, Nicholas A et al.2021 · 7 citationsCortex; a journal devoted to the study of the nervous system and behavior. 2020;129:314-328
MRI biomarkers of motor and non-motor symptoms in Parkinson's disease.31629653 · Ryman, Sephira G, Poston, Kathleen L2021 · 101 citationsParkinsonism & related disorders. 2020;73:85-93
Proactive and reactive cognitive control rely on flexible use of the ventrolateral prefrontal cortex.30407681 · Ryman, Sephira G, El Shaikh, Ansam A, Shaff, Nicholas A et al.2020 · 46 citationsHuman brain mapping. 2019;40(3):955-966
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