7T Amygdala and Citalopram Study
This study investigates how citalopram, a common antidepressant that increases a brain chemical called serotonin, affects a key part of the brain linked to depression, known as the amygdala. Healthy volunteers will receive either a single dose of citalopram or a dummy pill (placebo). While looking at emotional faces, their brains will be scanned using a special MRI machine (7T fMRI). This advanced scanner can look closely at different, smaller parts within the amygdala. The aim is to understand exactly how citalopram changes how these specific amygdala parts react to emotions, helping us learn more about how antidepressants help people with mood disorders.
At a glance
What is this study about?
This research wants to find out how a common antidepressant medicine, called citalopram, works in the brain. Citalopram is a type of medicine often used to help people with depression and other mood problems. It works by increasing levels of a brain chemical called serotonin. Scientists know that citalopram can change how people react to emotional information, but they don't fully understand the small details of how it does this, especially in a part of the brain called the amygdala.
The amygdala is a small but very important area in your brain often linked to how we process emotions. In people with depression, this area might not be working quite as it should. This study uses a very advanced brain scanner (called a 7T fMRI) that can look at the amygdala in much more detail than older scanners. This means they can see how citalopram affects different, very small parts of the amygdala.
By understanding these tiny changes, the researchers hope to get a clearer picture of how antidepressants bring about their positive effects. This knowledge could lead to better treatments in the future for people struggling with depression and other emotional difficulties.
Key takeaways
- Study explores how citalopram (antidepressant) affects a brain area called the amygdala.
- Uses advanced brain scanning (7T fMRI) to look at tiny details within the amygdala.
- Aims to understand how emotional processing is changed by the medicine.
- Involves a single dose of citalopram or a dummy pill, then a brain scan.
- Results could help improve future treatments for mood disorders.
Who may be eligible?
To join this study, you need to be a healthy volunteer between 18 and 40 years old. You must be able to understand and agree to take part, and speak English well enough to follow the study instructions.
There are several reasons why you might not be able to take part. For example, if you have any metal in your body (like medical implants or shrapnel) that could be affected by the strong scanner magnet, or if you have a pacemaker. You also can't have a history of serious mental health conditions like major depression or certain personality disorders. If you've recently taken psychoactive medications or other medicines that might affect how citalopram works, you may not be able to participate.
Additionally, certain medical conditions like heart problems, epilepsy, diabetes, glaucoma, or severe kidney/liver issues would prevent you from joining. The study team will carefully check your medical history to make sure taking part is safe for you and that the study results will be accurate.
Could this study suit you?
Answer these quick questions to see if you may be eligible. This is a guide only — the research team makes the final call.
- Are you between 18 and 40 years old?
- Do you have any metal implants or a pacemaker?
- Do you have a history of serious mental health conditions (like major depression)?
- Have you taken psychoactive medicines or other interacting drugs recently?
- Do you have conditions like heart disease, epilepsy, or severe diabetes?
What does participation involve?
If you decide to take part, you'll first have a medical and mental health check-up to make sure you're suitable and it's safe for you. This will probably involve answering questions about your health and medical history. After this, you'll be randomly assigned to receive either a single 20mg dose of citalopram or a single dose of a dummy pill (placebo) – neither you nor the researchers will know which one you get.
Once you've taken the pill, you will have a special brain scan (7T fMRI). During the scan, you'll be asked to look at emotional faces. The scan itself is painless but can be noisy and involves lying still for a period. The study is a single visit, so it won't involve multiple trips over a long time. You'll be given all the instructions clearly during your visit.
Potential risks and benefits
Locations (1)
- University of Oxford, Department of PsychiatryVerified postcodeOxford, United Kingdom· Recruiting
Common questions
What is citalopram?
Citalopram is a common antidepressant medicine used to treat depression and anxiety by affecting a brain chemical called serotonin.
What is the amygdala?
The amygdala is a part of your brain that plays a key role in processing emotions, especially fear and anxiety.
What is a 7T fMRI scan?
It's a very powerful type of brain scan that can see tiny details in the brain, helping researchers understand how different areas are working.
Will I know if I got the real medicine or the dummy pill?
No, this is a 'blinded' study, meaning neither you nor the researchers will know if you received citalopram or the placebo until after the study is complete.
How long will my participation take?
Your participation will involve a single visit for screening, taking the pill, and the brain scan.
How to find out more
Marieke AG Martens, DPhil
Always speak to your GP or specialist before deciding to take part in a study.
Interested in taking part?
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