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NCT00109642

The Role of Norepinephrine in Emotional Processing

Completed Last updated 2 July 2017
What this trial tests

trial in Psychopathy in 216 participants. Completed in 15 March 2009.

Timeline
26 April 2005
Primary endpoint
15 March 2009
15 March 2009

Quick facts

Lead sponsorNational Institute of Mental Health (NIMH)
StatusCompleted
Study typeOBSERVATIONAL
Enrollment216
Start date26 April 2005
Primary completion15 March 2009
Estimated completion15 March 2009
Sites1 location across United States

Conditions studied

Sponsor

National Institute of Mental Health (NIMH)

Who can join

Adults 20 to 50, any sex, with Psychopathy or Mental Disorders. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

This study will examine the role of a brain chemical called norepinephrine in thinking, decision-making, and emotional processing. After norepinephrine is released from a brain cell, it binds to another brain cell's receptor. Some of the receptors it binds to are called alpha-2 adrenergic receptors. This study will use medicines called yohimbine and guanfacine to look at the function of norepinephrine in the brain when it binds to the alpha-2 adrenergic receptors. Yohimbine increases norepinephrine's function and guanfacine decreases its function. Healthy volunteers between 20 and 50 years of age who do not have heart disease, high blood pressure, psychiatric illness, or other serious medical conditions and who are not allergic to lactose may be eligible for this study. Candidates are screened with a medical and psychiatric history, physical examination, neuropsychological testing, blood and urine tests and electrocardiogram. Women are screened with a urine pregnancy test. Participants are given a pill of yohimbine, guanfacine, or placebo and undergo the following tests and procedures: * Blood pressure and heart rate measurements: Blood pressure and heart rate are measured before the medication is taken and several times after. * Blood draws: Blood is drawn before the medicine is taken and 90 minutes after to measure levels of norepinephrine and the hormone cortisol. * Neurocognitive testing: Participants do neurocognitive tasks on the computer for up to 90 minutes. The tasks involve looking at pictures or words on a screen and responding according to instructions given. * Magnetic resonance imaging (MRI): Patients may undergo neurocognitive testing MRIs. This test uses a strong magnetic field and radio waves to show changes in brain activity. The subject lies on a table that slides into a narrow cylinder (the MRI scanner). Images of the brain are obtained while the subject performs the computer tasks.

Publications & conference data

No peer-reviewed publications indexed yet for this trial. Completed trials usually publish results within 12-18 months.

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Other National Institute of Mental Health (NIMH) trials

Trials by the same sponsor.

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Data sources for this page

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