Search Results - "Cowan, Ronald"

Dopaminergic mechanisms of individual differences in human effort-based decision-making by Treadway, Michael T, Buckholtz, Joshua W, Cowan, Ronald L, Woodward, Neil D, Li, Rui, Ansari, M Sib, Baldwin, Ronald M, Schwartzman, Ashley N, Kessler, Robert M, Zald, David H

“…Preferences for different combinations of costs and benefits are a key source of variability in economic decision-making. However, the neurochemical basis of…”
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Dopaminergic Network Differences in Human Impulsivity by Buckholtz, Joshua W, Treadway, Michael T, Cowan, Ronald L, Woodward, Neil D, Li, Rui, Ansari, M. Sib, Baldwin, Ronald M, Schwartzman, Ashley N, Shelby, Evan S, Smith, Clarence E, Kessler, Robert M, Zald, David H

“…Dopamine (DA) has long been implicated in impulsivity, but the precise mechanisms linking human variability in DA signaling to differences in impulsive traits…”
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Aerobic exercise training reduces cannabis craving and use in non-treatment seeking cannabis-dependent adults by Buchowski, Maciej S, Meade, Natalie N, Charboneau, Evonne, Park, Sohee, Dietrich, Mary S, Cowan, Ronald L, Martin, Peter R

“…Cannabis dependence is a significant public health problem. Because there are no approved medications for this condition, treatment must rely on behavioral…”
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Mild cognitive impairment and postsurgical pain in older adults: A call for research by Kertai, Miklos D., Monroe, Todd B., Cowan, Ronald L., Bruehl, Stephen

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Partial-volume correction increases estimated dopamine D2-like receptor binding potential and reduces adult age differences by Smith, Christopher T, Crawford, Jennifer L, Dang, Linh C, Seaman, Kendra L, San Juan, M Danica, Vijay, Aishwarya, Katz, Daniel T, Matuskey, David, Cowan, Ronald L, Morris, Evan D, Zald, David H, Samanez-Larkin, Gregory R

“…The relatively modest spatial resolution of positron emission tomography (PET) increases the likelihood of partial volume effects such that binding potential…”
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Gender Differences in Pain Threshold, Unpleasantness, and Descending Pain Modulatory Activation Across the Adult Life Span: A Cross Sectional Study by Failla, Michelle D, Beach, Paul A, Atalla, Sebastian, Dietrich, Mary S, Bruehl, Stephen, Cowan, Ronald L, Monroe, Todd B

“…The neurobiological underpinnings of gender differences in pain perception, and how these differences may be modified by age, are incompletely understood,…”
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Associations between dopamine D2 receptor availability and BMI depend on age by Dang, Linh C., Samanez-Larkin, Gregory R., Castrellon, Jaime J., Perkins, Scott F., Cowan, Ronald L., Zald, David H.

“…The dopamine D2/3 receptor subtypes (DRD2/3) are the most widely studied neurotransmitter biomarker in research on obesity, but results to date have been…”
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Mesolimbic dopamine reward system hypersensitivity in individuals with psychopathic traits by Ansari, M Sib, Kessler, Robert M, Cole, David, Schwartzman, Ashley N, Buckholtz, Joshua W, Shelby, Evan S, Zald, David H, Treadway, Michael T, Woodward, Neil D, Baldwin, Ronald M, Cowan, Ronald L, Li, Rui, Benning, Stephen D, Smith, Clarence E

“…Psychopathy is a personality disorder that is strongly linked to criminal behavior. Using [18F]fallypride positron emission tomography and blood oxygen…”
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Neuroimaging research in human MDMA users: a review by Cowan, Ronald L

“…Determining whether, under what circumstances, and to what extent 3,4-methylenedioxymethamphetamine (MDMA) exposure produces chronic changes in human brain…”
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Assessing advanced cancer pain in older adults with dementia at the end-of-life by Monroe, Todd, Carter, Michael, Feldt, Karen, Tolley, Betsey, Cowan, Ronald L.

“…Monroe T., Carter M., Feldt K., Tolley B. & Cowan R.L. (2012) Assessing advanced cancer pain in older adults with dementia at the end‐of‐life. Journal of…”
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Brain Serotonin Function in MDMA (Ecstasy) Users: Evidence for Persisting Neurotoxicity by BENNINGFIELD, Margaret M, COWAN, Ronald L

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Differential regional decline in dopamine receptor availability across adulthood: Linear and nonlinear effects of age by Seaman, Kendra L., Smith, Christopher T., Juarez, Eric J., Dang, Linh C., Castrellon, Jaime J., Burgess, Leah L., San Juan, M. Danica, Kundzicz, Paul M., Cowan, Ronald L., Zald, David H., Samanez‐Larkin, Gregory R.

“…Theories of adult brain development, based on neuropsychological test results and structural neuroimaging, suggest differential rates of age‐related change in…”
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Mesolimbic dopamine D2 receptors and neural representations of subjective value by Castrellon, Jaime J., Young, Jacob S., Dang, Linh C., Cowan, Ronald L., Zald, David H., Samanez-Larkin, Gregory R.

“…The process by which the value of delayed rewards is discounted varies from person to person. It has been suggested that these individual differences in…”
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Changes in dopamine release and dopamine D2/3 receptor levels with the development of mild obesity by Kessler, Robert M., Zald, David H., Ansari, Mohammad Sib, Li, Rui, Cowan, Ronald L.

“…[18F]Fallypride PET studies were used to estimate regional DA D2/3 receptor levels and DA release in healthy subjects with BMI's from 19 to 35. Significant,…”
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Amygdala and hippocampus fail to habituate to faces in individuals with an inhibited temperament by Blackford, Jennifer Urbano, Allen, Amil H, Cowan, Ronald L, Avery, Suzanne N

“…Habituation is a basic form of learning that reflects the adaptive reduction in responses to a stimulus that is neither threatening nor rewarding. Extremely…”
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A Cross-Sectional Study of Pain Sensitivity and Unpleasantness in People with Vascular Dementia by Beach, Paul A, Humbel, Angela, Dietrich, Mary S, Bruehl, Stephen, Cowan, Ronald L, Moss, Karen O, Monroe, Todd B

“…Abstract Objective Advanced age is associated with a higher risk of both pain and dementia, with many studies finding that dementia often heightens sensitivity…”
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Pain reports and pain medication treatment in nursing home residents with and without dementia by Monroe, Todd B, Misra, Sumathi K, Habermann, Ralf C, Dietrich, Mary S, Cowan, Ronald L, Simmons, Sandra F

“…Aim The purpose of this pilot study was to determine if a diagnosis of dementia influenced pain self‐reports and pain medication use in a group of verbally…”
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Oscillatory serotonin function in depression by Salomon, Ronald M., Cowan, Ronald L.

“…ABSTRACT Oscillations in brain activities with periods of minutes to hours may be critical for normal mood behaviors. Ultradian (faster than circadian) rhythms…”
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Midbrain Dopamine Receptor Availability Is Inversely Associated with Novelty-Seeking Traits in Humans by Zald, David H, Cowan, Ronald L, Riccardi, Patrizia, Baldwin, Ronald M, Ansari, M. Sib, Li, Rui, Shelby, Evan S, Smith, Clarence E, McHugo, Maureen, Kessler, Robert M

“…Novelty-seeking personality traits are a major risk factor for the development of drug abuse and other unsafe behaviors. Rodent models of temperament indicate…”
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Decreased dopamine type 2 receptor availability after bariatric surgery: Preliminary findings by Dunn, Julia P, Cowan, Ronald L, Volkow, Nora D, Feurer, Irene D, Li, Rui, Williams, D. Brandon, Kessler, Robert M, Abumrad, Naji N

“…Abstract Background: Diminished dopaminergic neurotransmission contributes to decreased reward and negative eating behaviors in obesity. Bariatric surgery is…”
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