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1.     Sundman, M. H., Green, J. M., Fuglevand, A. J., & Chou, Y.-H. (2024). TMS-derived short afferent inhibition discriminates cognitive status in older adults without dementia. Aging Brain, 6:100123. https://pubmed.ncbi.nlm.nih.gov/39132326/

2.     Hall, J.D. Green, J. M., Chen, A. Y., Liu, Y., Zhang, H., Sundman, M. H., & Chou, Y.-H. (2024). Exploring the potential of combining transcranial magnetic stimulation and electroencephalography to investigate mild cognitive impairment and Alzheimer’s disease: A systematic review. GeroScience, 46, 3659-3693. https://link.springer.com/article/10.1007/s11357-024-01075-6

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Our manuscript titled "Transcranial magnetic stimulation for the treatment of chemo brain" has been accepted for publication in Sensors!

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Our manuscript, entitled "The (hyper)excitable brain: What can a ubiquitous TMS measure reveal about cognitive aging? ", has been accepted by Neurobiology of Aging for publication!

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Our R21 project, "Interleaved TMS-fMRI for Hippocampal Stimulation: Modeling Dose-Response Relationship in Amnestic Mild Cognitive Impairment" is funded by NIH/NIA!

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Our recent meta-analysis entitled, "Cortical excitability and plasticity in Alzheimer's disease and mild cognitive impairment: A systematic review and meta-analysis of transcranial magnetic stimulation studies" was published in Ageing Research Reviews! https://pubmed.ncbi.nlm.nih.gov/35680080/

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Cortical excitability and plasticity in Alzheimer’s disease and mild cognitive impairment: A systematic review and meta-analysis of transcranial magnetic stimulation studies - PubMed

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Findings of our meta-analysis demonstrate the potential of using TMS-derived cortical excitability and plasticity measures as diagnostic biomarkers and therapeutic targets for AD and MCI.

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Our manuscript entitled, "Theta Burst Stimulation Enhances Memory and Functional Connectivity along Inferior Longitudinal Fasciculus in Mild Cognitive Impairment", by Chen, Ton That, Ugonna, Liu, Nadel, and Chou, is accepted by PNAS for publication! https://www.pnas.org/doi/full/10.1073/pnas.2113778119

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Diffusion MRI–guided theta burst stimulation enhances memory and functional connectivity along the inferior longitudinal fasciculus in mild cognitive impairment | Proceedings of the National Academy of Sciences

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Noninvasive theta burst stimulation (TBS) guided by brain white matter tractography
is a promising approach to strengthen resting-state functional con...

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"Efficacy of repetitive transcranial magnetic stimulation (rTMS) in treating stroke aphasia: Systematic review and meta-analysis" by Kielar, Patterson, and Chou is accepted for publication by Clinical Neurophysiology!!
https://www.sciencedirect.com/science/article/pii/S1388245722002589

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Available online 5 May 2022

Highlights

*

Repetitive Transcranial Magnetic Stimulation ( rTMS) can facilitate rehabilitation of language skills in post-stroke aphasia.

*

Individual clinical characteristics, rTMS parameters, and language skills moderated treatment effects.

*

Low frequency rTMS administered 20-40 min per day over right BA45 improved language abilities for up to 12 months.

Abstract

Objective

This meta-analysis examined the effectiveness of repetitive Transcranial Magnetic Stimulation ( rTMS) in treating post-stroke aphasia with a goal to identify parameters that are associated with successful treatment outcomes.

Methods

Following PRISMA guidelines, ten electronic databases were searched from inception till June 4th 2020. A total of 24 studies (out of 1971 records) with 567 participants met selection criteria and were included in the meta-analysis.

Results

The overall pooled meta-analysis revealed a significant medium effect size in favor of rTMS treatment: Standard mean difference (SMD) of 0.655 (95% CI = [0.481, 0.830], z = 7.369, p < 0.001). Moderator subgroup analyses indicated that participants' clinical characteristics and rTMS parameters moderated treatment effects. The strongest effects were observed for naming, followed by speech production, repetition and comprehension. The results indicate that with 10 to 15 sessions of 1-Hz rTMS administered 20-40 min per day over right BA45 (Brodmann's area 45), significant language improvements can be observed for up to 12 months.

Conclusions

Our findings suggest that the rTMS technique can enhance rehabilitation of language skills in post-stroke aphasia when administered according to the established safety parameters.

Significance

Our results have implications for treatment of post-stroke aphasia. In subacute aphasia, low frequency rTMS over right BA45 improved naming, repetition, speech fluency and writing but not comprehension, whereas in chronic aphasia naming and speech production improved, but repetition and comprehension showed smaller gains.

View full text

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Efficacy of repetitive transcranial magnetic stimulation in treating stroke aphasia: Systematic review and meta-analysis

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Available online 5 May 2022 * Repetitive Transcranial Magnetic Stimulation ( rTMS) can facilitate rehabilitation of language skills in post-stroke aphasia. * Individual clinical characteristics, rTMS parameters, and language skills moderated treatment effects. * Low frequency rTMS administered 20-40 min per day over right BA45 improved language abilities for up to 12 months.

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"Association Between Responsiveness to Transcranial Magnetic Stimulation and Interhemispheric Functional Connectivity of Sensorimotor Cortex in Older Adults" is now published in Brain Connectivity! https://pubmed.ncbi.nlm.nih.gov/35620910/

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doi: 10.1089/brain.2021.0180. Online ahead of print.

Affiliations

¹ Department of Psychology, University of Arizona, Tucson, Arizona, USA.

² Department of Biomedical Engineering, University of Arizona, Tucson, Arizona, USA.

³ Evelyn F McKnight Brain Institute, Arizona Center on Aging, and BIO5 Institute, University of Arizona, Tucson, Arizona, USA.

doi: 10.1089/brain.2021.0180. Online ahead of print.

Affiliations

¹ Department of Psychology, University of Arizona, Tucson, Arizona, USA.

² Department of Biomedical Engineering, University of Arizona, Tucson, Arizona, USA.

³ Evelyn F McKnight Brain Institute, Arizona Center on Aging, and BIO5 Institute, University of Arizona, Tucson, Arizona, USA.

Abstract

Introduction: Repetitive transcranial magnetic stimulation (rTMS) is a promising therapeutic technique, and is believed to accomplish its effect by influencing the stimulated and remotely connected areas. However, responsiveness to rTMS shows high interindividual variability, and this intersubject variability is particularly high in older adults. It remains unclear whether baseline resting-state functional connectivity (rsFC) contributes to this variability in older adults. The aims of this study are to (1) examine rTMS effects over the primary motor cortex (M1) in older adults, and (2) identify baseline network properties that may contribute to the interindividual variability. Methods: We tested response to intermittent theta burst stimulation (iTBS), an effective rTMS protocol, over M1 by using both electromyography and resting-state functional magnetic resonance imaging in older adults. Outcome measures included motor-evoked potential (MEP) elicited by single-pulse transcranial magnetic stimulation and rsFC before and after an iTBS session. Results: iTBS significantly increased MEP amplitudes and rsFC between the stimulation site, sensorimotor cortex, and supplementary motor area (SMA) in older adults. iTBS-induced changes in MEP amplitude were positively correlated with increases in interhemispheric rsFC after iTBS. Furthermore, older adults with lower baseline interhemispheric rsFC between sensorimotor cortex and SMA exhibited stronger MEP response after iTBS. Discussion: Findings of the study suggest that different levels of interhemispheric communication during resting state might contribute to the response heterogeneity to iTBS in older adults. Interhemispheric rsFC may have great potential serving as a useful marker for predicting iTBS responsiveness in older adults. ClinicalTrials.gov ID: 1707654427 Impact statement Factors contributing to interindividual variability of the responsive to repetitive transcranial magnetic stimulation (rTMS) in older adults remain poorly understood. In this study, we examined the effects of rTMS over the primary motor cortex in older adults, and found that response to rTMS is associated with prestimulation interhemispheric connectivity in the sensorimotor and premotor areas. Findings of the study have great potential to be translated into a connectivity-based strategy for identification of responders for rTMS in older adults.

Keywords: functional connectivity; interindividual variability; older adults; theta burst stimulation; transcranial magnetic stimulation (TMS).

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Network connectivity and individual responses to brain stimulation in the human motor system.

Cárdenas-Morales L, Volz LJ, Michely J, Rehme AK, Pool EM, Nettekoven C, Eickhoff SB, Fink GR, Grefkes C. Cárdenas-Morales L, et al. Cereb Cortex. 2014 Jul;24(7):1697-707. doi: 10.1093/cercor/bht023. Epub 2013 Feb 8. Cereb Cortex. 2014. PMID: 23395849

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national center for biotechnology information

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Association Between Responsiveness to Transcranial Magnetic Stimulation and Interhemispheric Functional Connectivity of Sensorimotor Cortex in Older Adults - PubMed

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The .gov means it's official. Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site. The site is secure. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

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Congratulations to Green, Sundman, and Chou! Their review article, "Opioid-induced microglia reactivity modulates opioid reward, analgesia, and behavior" is published by Neuroscience and Biobehavioral Reviews!
https://pubmed.ncbi.nlm.nih.gov/35090951/

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doi: 10.1016/j.neubiorev.2022.104544.

Affiliations

¹ Brain Imaging and TMS Laboratory, Department of Psychology, University of Arizona, Tucson, USA.

² Brain Imaging and TMS Laboratory, Department of Psychology, University of Arizona, Tucson, USA; Evelyn F McKnight Brain Institute, Arizona Center on Aging, and BIO5 Institute, University of Arizona, Tucson, USA. Electronic address: yinghuichou@email.arizona.edu.

doi: 10.1016/j.neubiorev.2022.104544.

Affiliations

¹ Brain Imaging and TMS Laboratory, Department of Psychology, University of Arizona, Tucson, USA.

² Brain Imaging and TMS Laboratory, Department of Psychology, University of Arizona, Tucson, USA; Evelyn F McKnight Brain Institute, Arizona Center on Aging, and BIO5 Institute, University of Arizona, Tucson, USA. Electronic address: yinghuichou@email.arizona.edu.

Abstract

Opioid-induced microglia reactivity affects opioid reward and analgesic processes in ways that may contribute to the neurocognitive impairment observed in opioid addicted individuals. Opioids elicit microglia reactivity through the actions of opioid metabolites at TLR4 receptors, that are located primarily on microglia but are also present on astrocytes. Specifically, the M3G metabolite, which has no affinity for opioid receptors, exerts off-target effects on TLR4 receptors that can trigger downstream immunologic consequences. This off-target microglial reactivity, and the subsequent increase in microglial release of TNFα, IL-1β, and BDNF, have been suggested to modulate both opioid-induced reward and opioid-induced analgesia. Despite occurring independently of each other, these neuro-immune effects could converge and result in overactivation of the insula. This would produce an imbalance between the "impulsive system" and the "executive system", such that the impulsive system's influence over behavior becomes dominant. This state, derived from changes in microglial reactivity, could contribute to impairment in a range of neurocognitive domains that are intricately involved in addiction and lead to increases in addiction-related behaviors.

Keywords: Analgesia; BDNF; Cognitive impairment; Hyperalgesia; IL-1β; Microglia reactivity; Neuroinflammation; Opioids; Reward; TNFα.

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national center for biotechnology information

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Opioid-induced microglia reactivity modulates opioid reward, analgesia, and behavior - PubMed

# data[].attributes.attachment_link.description
Opioid-induced microglia reactivity affects opioid reward and analgesic processes in ways that may contribute to the neurocognitive impairment observed in opioid addicted individuals. Opioids elicit microglia reactivity through the actions of opioid metabolites at TLR4 receptors, that are located pr ...

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Congratulations to Sundman, Chen, and Liu for receiving U of A GSPC Travel Awards to support their trip to the 4th International Brain Stimulation Conference at Charleston, SC!

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Our R01 project, "Enhancement of Hippocampal Plasticity Using Repetitive Transcranial Magnetic Stimulation" is funded by NIH/NIA! It is featured by the UANews, BIO5 News, and Phoenix Business Journal websites!

https://uanews.arizona.edu/story/researcher-awarded-34m-develop-personalized-treatment-mild-cognitive-impairment

https://bio5.org/news/uarizona-researcher-awarded-34m-develop-personalized-treatment-mild-cognitive-impairment

https://www.bizjournals.com/phoenix/news/2020/05/19/federal-grant-arizona-scientist-memory-loss.html

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Congratulations to Dr. Ying-hui Chou, who has been awarded an Enhancement of Equipment Fund by the University of Arizona for the MRI-compatible Transcranial Magnetic Stimulation System!

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Our MRI-compatible TMS and Navigation Systems are delivered today!

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Congratulations to Mark Sundman for receiving the Galileo Circle Graduate Scholars Award!

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TMS-compatible EEG system is delivered!

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Our manuscript entitled "

Dual-task performance is associated with brain MRI Morphometry in individuals with mild cognitive impairment

" is published Journal of Neuroimaging!
https://pubmed.ncbi.nlm.nih.gov/33783915/

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Affiliations

¹ Department of Biomedical Engineering, University of Arizona, Tucson, AZ.

² Arizona Center on Aging, Department of Medicine, College of Medicine, University of Arizona, Tucson, AZ.

³ Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona, Tucson, AZ.

⁴ Department of Psychology, University of Arizona, Tucson, AZ.

⁵ Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ.

Free PMC article

Free PMC article

Affiliations

¹ Department of Biomedical Engineering, University of Arizona, Tucson, AZ.

² Arizona Center on Aging, Department of Medicine, College of Medicine, University of Arizona, Tucson, AZ.

³ Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona, Tucson, AZ.

⁴ Department of Psychology, University of Arizona, Tucson, AZ.

⁵ Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ.

Abstract

Background and purpose: Cognitive impairment is a critical health problem in the elderly population. Research has shown that patients with mild cognitive impairment (MCI) may develop dementia in later years. Therefore, early identification of MCI could allow for interventions to help delay the progression of this devastating disease. Our objective in this study was to detect the early presence of MCI in elderly patients via neuroimaging and dual-task performance.

Methods: Brain MRI scans from 21 older adult volunteers, including cognitively healthy adults (HA, n = 9, age = 68-79 years) and mild cognitively impaired (MCI, n = 12, age = 66-92 years) were analyzed using automatic segmentation techniques. Regional volume, surface area, and thickness measures were correlated with simultaneous performance of motor and cognitive tasks (dual-task) within a novel upper-extremity function (UEF) test, using multivariate analysis of variance models.

Results: We found significant associations of dual-task performance with volume of five cortical brain regions (P ≤ .048) and thickness of 13 regions (P ≤ .043) within the frontal, temporal, and parietal lobes. There was a significant interaction effect of cognitive group on dual-task score for the inferior temporal gyrus volume (P ≤ .034), and the inferior parietal lobule, inferior temporal gyrus, and middle temporal gyrus average thickness (P ≤ .037).

Conclusions: This study highlighted the potential of dual-tasking and MRI morphometric changes as a simple and accurate tool for early detection of cognitive impairment among community-dwelling older adults. The strong interaction effects of cognitive group on UEF dual-task score suggest higher association between atrophy of these brain structures and compromised dual-task performance among the MCI group.

Keywords: Automated MRI analysis; dual-task; mild cognitive impairment; upper-extremity function.

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national center for biotechnology information

# data[].attributes.attachment_link.title
Dual-task performance is associated with brain MRI Morphometry in individuals with mild cognitive impairment - PubMed

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This study highlighted the potential of dual-tasking and MRI morphometric changes as a simple and accurate tool for early detection of cognitive impairment among community-dwelling older adults. The strong interaction effects of cognitive group on UEF dual-task score suggest higher association betwe ...

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Rudolph Rodriguez's manuscript entitled, "Chemobrain: The Unspoken Reality of Life After Cancer", is accepted for publication by Harvard Brain! Great work, Rudy!

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Letter-to-the-Editor titled, "TMS-Induced Seizure Cases Stratified by Population, Stimulation Protocol, and Stimulation Site: A Systematic Literature Search”, by Chou, Ton That, Chen, Sundman, and Huang, is accepted for publication in Clinical Neurophysiology! https://pubmed.ncbi.nlm.nih.gov/32193163/

Check out the recent article, "Potential for Resting-State fMRI of the Amygdala in Elucidating Neural Mechanisms of Adaptive Self-Regulatory Strategies: A Systematic Review", by Warren, Chou, and Steklis, is published in Brain Connectivity ! https://www.ncbi.nlm.nih.gov/pubmed/31950847

Chou, Ton That, and Sundman published a manuscript titled, "A Systematic Review and Meta-Analysis of rTMS Effects on Cognitive Enhancement in Mild Cognitive Impairment and Alzheimer's Disease" is published in Neurobiology of Aging!

https://www.ncbi.nlm.nih.gov/pubmed/31783330

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Our manuscript entitled "Transcranial Magnetic Stimulation Reveals Diminished Homeostatic Metaplasticity in Cognitively Impaired Adults" is accepted for publication by Brain Communications! Congratulations to Mark Sundman, Koeun Lim, Viet Ton That, Rudy Rodriguez, Yilin Liu, and Ying-hui Chou! https://pubmed.ncbi.nlm.nih.gov/33376989/

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Congratulations to Rudolph Rodriguez for receiving the College of Science Galileo Circle Scholarship and for winning the Third Place Undergraduate Research Poster Presentation: 2020 14th Annual WAESO Student Research Conference !!

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Congratulations to Dr. Ying-hui Chou, who has been awarded a Faculty Seed Grant by the University of Arizona!

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NIBIB Director, Dr. Bruce Tromberg, Visiting our Lab

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NIBIB Director, Dr. Bruce Tromberg, Visiting our Lab

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Dr. Ying-Zu Huang Speaking at our TMS Workshop

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Dr. Ying-Zu Huang Speaking at our TMS Workshop

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Congratulations to Dr. Mark Sundman for successfully defending his dissertation! 11/2022

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Congratulations to Dr. Mark Sundman for successfully defending his dissertation! 11/2022

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Congratulations to Dr. Yu-Chin Allison Chen for successfully defending her dissertation! 11/2023

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Congratulations to Dr. Yu-Chin Allison Chen for successfully defending her dissertation! 11/2023