Olfactory and Brain Stimulations in Treatment-resistant Depression
This study focuses on people with depression that hasn't improved with standard treatments, often called 'treatment-resistant depression'. It investigates whether a special type of gentle brain stimulation, called iTBS, works better when combined with pleasant smells. iTBS aims to help parts of the brain linked to mood and pleasure. Researchers want to compare the effects of this combined approach versus iTBS alone. The hope is to find more effective ways to help people feel better, especially those who struggle to experience joy, a common symptom of depression. This is a carefully designed study where participants are randomly assigned to one of the treatment groups without knowing which one they are receiving.
At a glance
What is this study about?
Depression is a common health problem, affecting many adults. Sometimes, people experience a type of depression called 'treatment-resistant depression,' meaning their symptoms haven't improved with typical treatments like medication or talking therapies. A key symptom for many people with depression is anhedonia, which means losing the ability to feel pleasure or joy in things they once enjoyed.
Researchers are exploring new ways to help. One promising approach is 'non-invasive brain stimulation,' specifically a type called intermittent theta-burst stimulation (iTBS). This treatment gently stimulates a particular area of the brain thought to be involved in mood and reward. The idea is that it might help this part of the brain work better and potentially increase the release of chemicals that improve mood.
This study wants to take this a step further. We know that our sense of smell is closely linked to our brain's reward system. Interestingly, some studies suggest that simply smelling pleasant things can help improve symptoms of depression. So, this research is investigating whether combining iTBS with pleasant smells works even better than iTBS alone for people with treatment-resistant depression, especially when it comes to bringing back the ability to experience pleasure.
Key takeaways
- Looks at combining brain stimulation with pleasant smells for hard-to-treat depression.
- Aims to improve mood and the ability to feel pleasure.
- Compares combined treatment to brain stimulation alone.
- Uses a non-invasive brain stimulation called iTBS.
- Participation is voluntary and carefully monitored.
Who may be eligible?
This study is looking for adults aged 18 and over who have been diagnosed with depression that hasn't improved with standard treatments. Your depression symptoms would need to be at a certain level, and you should specifically have difficulties experiencing pleasure.
You would need to have been on a stable dose of antidepressant medication for at least four weeks before joining. You also need to be able to speak and read French and be willing to sign a consent form to participate.
However, you wouldn't be able to join if you have certain health conditions like a problem with your sense of smell, other serious medical conditions affecting the brain, or other mental health issues or drug use (other than smoking). You also can't take part if you have certain metal implants in your head or are pregnant or breastfeeding.
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 an adult aged 18 or over?
- Have you been diagnosed with depression that hasn't responded well to other treatments?
- Do you have difficulty experiencing pleasure or joy?
- Have you been on the same antidepressant medication for at least 4 weeks?
- Do you not have any major problems with your sense of smell or other serious medical conditions?
- Are you not pregnant or breastfeeding?
What does participation involve?
If you decide to take part, you would be randomly assigned to one of two groups: either receiving the brain stimulation by itself or receiving it combined with pleasant smells. It's a 'double-blind' study, meaning neither you nor the research team would know which treatment you're receiving.
The brain stimulation involves a device placed on your head that delivers gentle magnetic pulses. If you are in the combined group, you would also experience pleasant smells during these sessions. The researchers would regularly check your mood and how you're feeling using questionnaires throughout the study. The total duration of your participation, including all visits and assessments, would be explained in detail by the research team.
Potential risks and benefits
Locations (1)
- CH Le VinatierVerified postcodeBron, France· Recruiting
Common questions
What is 'treatment-resistant depression'?
It's when depression symptoms haven't improved much, even after trying standard treatments like medication or therapy.
What is iTBS?
It's a gentle, non-invasive brain stimulation that uses magnetic pulses to target specific areas of your brain involved in mood.
Why are smells involved?
The sense of smell is strongly linked to the brain's reward system, and researchers think pleasant smells might boost the effects of brain stimulation.
Will I know which treatment I'm getting?
No, it's a 'double-blind' study, meaning neither you nor the researchers will know which treatment you are receiving until after the study is complete.
Can I stop participating if I want to?
Yes, you are always free to withdraw from the study at any time without any impact on your ongoing medical care.
How to find out more
SARTELET Lydie
Always speak to your GP or specialist before deciding to take part in a study.
Interested in taking part?
Discussion
Community discussion
Powered by our forum at community.patient.info. Please be respectful — this is not medical advice.