Search Results - "Bell, Ryan P."

Dissociated grey matter changes with prolonged addiction and extended abstinence in cocaine users by Connolly, Colm G, Bell, Ryan P, Foxe, John J, Garavan, Hugh

“…Extensive evidence indicates that current and recently abstinent cocaine abusers compared to drug-naïve controls have decreased grey matter in regions such as…”
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Brain multimodal co-alterations related to delay discounting: a multimodal MRI fusion analysis in persons with and without cocaine use disorder by Meade, Christina S, Li, Xiang, Towe, Sheri L, Bell, Ryan P, Calhoun, Vince D, Sui, Jing

“…Delay discounting has been proposed as a behavioral marker of substance use disorders. Innovative analytic approaches that integrate information from multiple…”
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Reciprocal Influences of HIV and Cannabinoids on the Brain and Cognitive Function by Towe, Sheri L., Meade, Christina S., Cloak, Christine C., Bell, Ryan P., Baptiste, Julian, Chang, Linda

“…Globally, cannabis is the most commonly used illicit drug, with disproportionately high use among persons with HIV. Despite advances in HIV care, nearly half…”
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The Acute Effects of Time-Varying Caloric Vestibular Stimulation as Assessed With fMRI by Black, Robert D., Bell, Ryan P., Riska, Kristal M., Spankovich, Christopher, Peters, Richard W., Lascola, Christopher D., Whitlow, Christopher T.

“…We describe preliminary results from the application of time-varying caloric vestibular stimulation (tvCVS) to volunteers during a continuous blood oxygen…”
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Cocaine use is associated with cerebral white matter hyperintensities in HIV disease by Meade, Christina S, Bell, Ryan P, Towe, Sheri L, Lascola, Christopher D, Al-Khalil, Kareem, Gibson, Matthew J

“…White matter hyperintensities (WMH), a marker of cerebral small vessel disease and predictor of cognitive decline, are observed at higher rates in persons with…”
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White Matter Changes in HIV+ Women with a History of Cocaine Dependence by Wakim, Kathryn-Mary, Molloy, Ciara J, Bell, Ryan P, Ross, Lars A, Foxe, John J

“…Cocaine use is associated with the transmission of human immunodeficiency (HIV) virus through risky sexual behavior. In HIV+ individuals, cocaine use is linked…”
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Cocaine-related alterations in fronto-parietal gray matter volume correlate with trait and behavioral impulsivity by Meade, Christina S., Bell, Ryan P., Towe, Sheri L., Hall, Shana A.

“…•Cocaine users had broad reductions in gray matter volume in the brain.•Reduced volume in prefrontal and posterior parietal cortices correlated with…”
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Structural and Functional Brain Abnormalities in Human Immunodeficiency Virus Disease Revealed by Multimodal Magnetic Resonance Imaging Fusion: Association With Cognitive Function by Sui, Jing, Li, Xiang, Bell, Ryan P, Towe, Sheri L, Gadde, Syam, Chen, Nan-kuei, Meade, Christina S

“…Abstract Background Human immunodeficiency virus (HIV)–associated neurocognitive impairment remains a prevalent comorbidity that impacts daily functioning and…”
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On the down-sampling of diffusion MRI data along the angular dimension by Chen, Nan-kuei, Bell, Ryan P., Meade, Christina S.

“…It has been established that the diffusion gradient directions in diffusion MRI should be uniformly distributed in 3D spherical space, so that…”
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Hub disruption in HIV disease and cocaine use: A connectomics analysis of brain function by Al-Khalil, Kareem, Bell, Ryan P., Towe, Sheri L., Cohen, Jessica R., Gadde, Syam, Mu, James, Hall, Shana A., Meade, Christina S.

“…Cocaine use (CU) is prevalent in people with HIV (PWH). Both conditions are linked to changes in cognitive functioning and neural network topology. The current…”
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Synergistic effects of HIV and marijuana use on functional brain network organization by Hall, Shana A., Lalee, Zahra, Bell, Ryan P., Towe, Sheri L., Meade, Christina S.

“…HIV is associated with disruptions in cognition and brain function. Marijuana use is highly prevalent in HIV but its effects on resting brain function in HIV…”
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Reward and executive control network resting-state functional connectivity is associated with impulsivity during reward-based decision making for cocaine users by Hobkirk, Andréa L., Bell, Ryan P., Utevsky, Amanda V., Huettel, Scott, Meade, Christina S.

“…•Functional changes in reward and executive brain circuitry occur in addiction.•Resting-state connectivity was related to risk-taking propensity for cocaine…”
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The influence of monetary punishment on cognitive control in abstinent cocaine-users by Hester, Robert, Bell, Ryan P, Foxe, John J, Garavan, Hugh

“…Abstract Background Dependent drug users show a diminished neural response to punishment, in both limbic and cortical regions, though it remains unclear how…”
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Neural correlates of craving and impulsivity in abstinent former cocaine users: Towards biomarkers of relapse risk by Bell, Ryan P., Garavan, Hugh, Foxe, John J.

“…A significant hindrance to effective treatment of addiction is identifying those most likely to relapse. Cocaine addiction is characterized by deficits in…”
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Intact inhibitory control processes in abstinent drug abusers (I): A functional neuroimaging study in former cocaine addicts by Bell, Ryan P., Foxe, John J., Ross, Lars A., Garavan, Hugh

“…Neuroimaging studies in current cocaine dependent (CD) individuals consistently reveal cortical hypoactivity across regions of the response inhibition circuit…”
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Cocaine Use Prediction With Tensor-Based Machine Learning on Multimodal MRI Connectome Data by Zhang, Anru R, Bell, Ryan P, An, Chen, Tang, Runshi, Hall, Shana A, Chan, Cliburn, Al-Khalil, Kareem, Meade, Christina S

“…This letter considers the use of machine learning algorithms for predicting cocaine use based on magnetic resonance imaging (MRI) connectomic data. The study…”
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Human immunodeficiency virus‐related decreases in corpus callosal integrity and corresponding increases in functional connectivity by Hall, Shana A., Bell, Ryan P., Davis, Simon W., Towe, Sheri L., Ikner, Taylor P., Meade, Christina S.

“…People living with human immunodeficiency virus (PLWH) often have neurocognitive impairment. However, findings on HIV‐related differences in brain network…”
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Cortico-striatal networking deficits associated with advanced HIV disease and cocaine use by Al-Khalil, Kareem, Bell, Ryan P., Towe, Sheri L., Gadde, Syam, Burke, Emma, Meade, Christina S.

“…Cocaine use is disproportionately prevalent in people with HIV (PWH) and is known to potentiate HIV neuropathogenesis. As both HIV and cocaine have…”
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Additive cortical gray matter deficits in people living with HIV who use cocaine by Bell, Ryan P., Towe, Sheri L., Al-Khalil, Kareem, Gibson, Matthew, Nadeem, Tauseef, Meade, Christina S.

“…Cocaine use, which is disproportionately common in people living with HIV (PWH), is known to have neurotoxic effects that may exacerbate HIV neuropathogenesis…”
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Strengthened and posterior-shifted structural rich-club organization in people who use cocaine by Hall, Shana A., Bell, Ryan P., Gadde, Syam, Towe, Sheri L., Nadeem, Muhammad Tauseef, McCann, Peter S., Song, Allen W., Meade, Christina S.

“…People with cocaine use disorder (CUD) often have abnormal cognitive function and brain structure. Cognition is supported by brain networks that typically have…”
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