Reward-Related Processes and Brain Function
5 października 2017 zaktualizowane przez: National Institute of Mental Health (NIMH)
This study will examine and compare brain changes during decision-making in healthy adolescents and adolescents who are anxious or depressed. The findings may provide a better understanding of mechanisms that lead to depression or anxiety.
Adolescents between 9 and 17 years of age and adults between 20 and 40 years of age in the following categories will be enrolled in this study:
- Healthy adults
- Healthy adolescents
- Adolescents with major depression
- Adolescents with anxiety disorder (generalized anxiety disorder, social phobia, or/and separation anxiety disorder)
The study involves three visits, as follows:
Visit 1
Visit 1 consists of three parts for both child and adult participants:
- Part 1: Staff will meet with participants for a standard psychiatric interview, which will include questions about the participants feelings, experiences and behavior both past and present. For adolescent participants, staff will meet with the child alone, the parent alone, and the child and parent together.
- Part 2: Participants will perform a series of simple tasks involving shapes, letters, and numbers. They will have a medical history, physical examination and blood draw. In addition, adolescents will have a urine drug test.
- Part 3: Adults and those adolescents who will undergo magnetic resonance imaging (MRI) in Visit 3 will receive training to familiarize them with the procedure.
Visit 2
- Adolescents will again be asked standardized questions regarding their feelings, experiences and behavior, and will then perform a series of simple decision-making tasks on a computer.
- Adults will undergo MRI scanning, as described below in Visit 3 for adolescents. This concludes the participation of adults in the study.
Visit 3
Adolescents will have one of the following two procedures:
- Decision-making task using a computer. Small electrodes will be placed on the child s wrists, face and fingers to monitor muscle tone and skin humidity during the task.
Or
- MRI, a test that uses a strong magnetic field and radio waves to show changes in brain function. During the scan, the participant lies on a table in a space enclosed by a metal cylinder (the MRI scanner). The procedure takes 60-90 minutes; subjects must lie still for 10-15 minutes at a time. During imaging, the subject will be asked to perform a decision-making task on a computer.
Przegląd badań
Status
Zakończony
Warunki
Szczegółowy opis
Impaired motivated behaviors, including aspects of decision-making and reward-related processes, lie at the root of maladaptive behavior in many psychiatric disorders, including major depression (MD).
Little is known of the cognitive and neural mechanisms that underlie MD in adolescents.
Adolescence is a key period during which many psychiatric disorders first emerge, and studies during this developmental stage may provide a unique window to address primary deficits associated with the disorders.
In particular, major depression shows a marked increase in prevalence at adolescence.
Data from family-based and longitudinal studies suggest that anxiety disorders (AD), often preceding MD, may index childhood vulnerabilities for the development of MD.
The concomitant examination of MD and AD can help interpret these findings.
We propose to examine, in adolescents, the manner in which the various elemental emotional-cognitive processes are differentially affected in MD and AD compared to healthy controls.
This investigation will be done in two phases.
In Phase I, using fMRI, we will test two tasks in the decision-making model of gambling that have similarly been tested in adults in a group of healthy adolescents and healthy adults.
This phase will serve as a test of the feasibility and validity of using these tasks in adolescents, and will provide normative developmental data by comparing healthy adults with healthy adolescents.
In addition to showing the feasibility of using these tasks in normal adolescents, we will also test task performance behaviorally in healthy, anxious and depressed adolescents.
Measures will include psychophysiological and eye tracking measures, and behavioral variables.
Once task performance is well characterized behaviorally, we will conduct in Phase II an fMRI study in independent groups of depressed and anxious adolescents and compare the findings with those obtained in healthy adolescents.
Typ studiów
Obserwacyjny
Zapisy (Rzeczywisty)
241
Kontakty i lokalizacje
Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.
Lokalizacje studiów
-
-
District of Columbia
-
Washington, D.C., District of Columbia, Stany Zjednoczone
- Childrens National Medical Center
-
-
Maryland
-
Bethesda, Maryland, Stany Zjednoczone, 20892
- National Institutes of Health Clinical Center, 9000 Rockville Pike
-
-
Kryteria uczestnictwa
Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.
Kryteria kwalifikacji
Wiek uprawniający do nauki
9 lat do 40 lat (Dziecko, Dorosły)
Akceptuje zdrowych ochotników
Nie
Płeć kwalifikująca się do nauki
Wszystko
Opis
INCLUSION CRITERIA:
- Age: Subjects will be males and females, 9-17 and 20-40 years of age.
- Psychiatric history: Subjects in Group 3, and 4 will be diagnosed with current MD, and current AD (generalized anxiety disorder, social phobia, or/and separation anxiety disorder) respectively, based on k-SADS interviews of parents and adolescents for minors (<18 years old), and SCID for adults. History of anxiety disorders in individuals with MD is acceptable, if current symptoms are mild or absent (see exclusion criteria). Similarly, history of depression in individuals with AD is acceptable, if current symptoms are mild or absent (see exclusion criteria). AD and MD patients should have a CGAS< 70.
- Medication status: No history of medication treatment or use of an SSRI > one month prior to entering the study and fluoxetine > six months prior to entering the study.
EXCLUSION CRITERIA:
Because factors such as psychiatric disease, or CNS disease, can influence functional brain activity, and pregnancy precludes participation in fMRI studies, these factors are exclusionary.
- Psychiatric disease: Any current history of an axis I diagnosis other than adjustment disorder, simple phobia, Social Phobia, Separation Anxiety, dysthymia, GAD and MD is exclusionary. Subjects will be assessed using DSM-IV criteria via standardized psychiatric interviews conducted by trained examiners (K-SADS in minors and SCID in adults). Any current suicidal ideation, and severe ADHD requiring pharmacotherapy will be exclusionary.
- History of Drug Abuse: Axis I diagnoses of substance use disorders will be exclusionary.
- Severe acute and chronic medical illnesses
- CNS disease: History of brain abnormalities (e.g., neoplasms, subarachnoid cysts), cerebrovascular disease, infectious disease (e.g., abscess), or other neurological disease, or history of head trauma (defined as loss of consciousness > 3 min).
- IQ lower than 70.
- Metal or electronic objects: Metal plates, certain types of dental braces, cardiac pacemakers, etc., that are sensitive to electromagnetic fields contraindicate MRI scans.
- Claustrophobia: Subjects will be questioned about potential discomfort in being in an enclosed space, such as an MRI scanner.
- Pregnancy status: Because of the potential effects of hormonal changes on brain function as well as the unknown effects of electromagnetic field on the fetus, pregnancy is an exclusion criterion. Sexually mature female participants must have a negative urine pregnancy test performed within 24 hours of the fMRI scan.
Plan studiów
Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.
Jak projektuje się badanie?
Szczegóły projektu
Współpracownicy i badacze
Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.
Śledczy
- Główny śledczy: Monique Ernst, M.D., National Institute of Mental Health (NIMH)
Publikacje i pomocne linki
Osoba odpowiedzialna za wprowadzenie informacji o badaniu dobrowolnie udostępnia te publikacje. Mogą one dotyczyć wszystkiego, co jest związane z badaniem.
Publikacje ogólne
- Elliott R, Sahakian BJ, McKay AP, Herrod JJ, Robbins TW, Paykel ES. Neuropsychological impairments in unipolar depression: the influence of perceived failure on subsequent performance. Psychol Med. 1996 Sep;26(5):975-89. doi: 10.1017/s0033291700035303.
- Rogers RD, Owen AM, Middleton HC, Williams EJ, Pickard JD, Sahakian BJ, Robbins TW. Choosing between small, likely rewards and large, unlikely rewards activates inferior and orbital prefrontal cortex. J Neurosci. 1999 Oct 15;19(20):9029-38. doi: 10.1523/JNEUROSCI.19-20-09029.1999.
- Murphy FC, Sahakian BJ, Rubinsztein JS, Michael A, Rogers RD, Robbins TW, Paykel ES. Emotional bias and inhibitory control processes in mania and depression. Psychol Med. 1999 Nov;29(6):1307-21. doi: 10.1017/s0033291799001233.
Daty zapisu na studia
Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.
Główne daty studiów
Rozpoczęcie studiów
11 stycznia 2002
Ukończenie studiów
24 lipca 2017
Daty rejestracji na studia
Pierwszy przesłany
15 stycznia 2002
Pierwszy przesłany, który spełnia kryteria kontroli jakości
15 stycznia 2002
Pierwszy wysłany (Oszacować)
16 stycznia 2002
Aktualizacje rekordów badań
Ostatnia wysłana aktualizacja (Rzeczywisty)
6 października 2017
Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości
5 października 2017
Ostatnia weryfikacja
24 lipca 2017
Więcej informacji
Terminy związane z tym badaniem
Słowa kluczowe
Dodatkowe istotne warunki MeSH
Inne numery identyfikacyjne badania
- 020092
- 02-M-0092
Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .