Clinical trials

People in good health do not perceive the future in the same way as those suffering from depression. This difference in perception affects behaviour and emotions and warrants further investigation, both before and after treatment with antidepressants. Research shows that past negative experiences with medication can reduce the effectiveness of treatment, whilst positive expectations can increase it. It is important to gain a better understanding of how antidepressants influence the way in which elderly people with major depressive disorder (MDD) change their beliefs, and to determine whether an improvement in their depressive symptoms is linked to these changes in their beliefs. This study aims to understand whether antidepressants can alter the way people view the future and whether this contributes to their effectiveness. It also seeks to determine whether patients' expectations regarding treatment influence clinical outcomes, and whether changes in their mood may in turn affect these expectations. The study will involve 31 patients aged 65 and over who are suffering from a depressive disorder and require a change of antidepressant, and 31 healthy subjects, also aged 65 and over. The participants' involvement will last for 12 weeks. During a medical consultation, once the doctor has checked that the participant meet all the study's eligibility criteria, they will ask for the participant consent to take part in the study. The participant will then be asked to answer one question about what you hope to gain from the new antidepressant treatment that the doctor will prescribe for the participant. Finally, the participant will carry out a belief-updating exercise, which involves : presenting the participant with a series of events and ask them to indicate how likely they think each of them is to occur, and then. Once they have received further information about these events, ask them to reassess the likelihood of them occurring. This task will be carried out again 12 weeks after the participant start taking their antidepressant, during a consultation required as part of their individual care plan. From the first week of antidepressant treatment until week 12, the participant will be contacted by telephone once a week to answer two short questions about their expectations regarding the treatment and any changes in your mood.

Functional neurological disorder (FND) is a condition that causes significant suffering and disability. It is defined by the presence of neurological symptoms that interfere with an individual's functioning and are not consistent with any known anatomical lesion but that causes significant functional impairment. The investigators are particularly interested in motor symptoms (abnormal movements or motor deficits). Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive and acceptable treatment that has proven effective in certain chronic pain conditions, depression, and OCD. The investigators would like to evaluate the impact of rTMS on the patient's overall perception of change, particularly on the clinical symptoms of motor FND. Secondary objectives include evaluating the overall effect on symptoms from the clinician's perspective, the effect on quality of life, on depressive and anxiety symptoms and associated dissociation, as well as evaluating any changes in the sense of agency and identifying the side effects of rTMS treatment.

Depression is a common complication of Autism Spectrum Disorder (ASD): it is four times more prevalent in people with ASD than in the general population. However, treating depression in people with ASD is complicated by the lack of guidelines. Antidepressants appear to be less effective and less well tolerated than in the general population. rTMS (repetitive transcranial magnetic stimulation) is a technique that stimulates the brain in a painless and non-invasive way. This technique is well tolerated and has very few side effects (headaches, fatigue). It is now used routinely in clinical practice to treat resistant depression, with satisfactory results. A few studies using rTMS in depression in people with ASD have shown encouraging results and avenues for improvement. It could therefore be interesting to conduct a therapeutic study with rTMS on depression in people with ASD, following the avenues for improvement proposed by previous studies. The main objective is to evaluate the effectiveness of rTMS in depressed patients with ASD by looking at changes in mood before and after treatment. The investigator will also look at the effects on executive and attentional functions and repetitive behaviors, as well as treatment tolerance.

The goal of this clinical trial is to identify reliable markers of apathy in elderly subjects with bipolar disorder, age between 70 and 85 years, in order to accurately identify subjects at high risk of progressing to dementia by measuring motor activity (actimetrics), recorded language and analysing brain changes (MRI). Actimetry is the measurement and recording of body movements using an actimeter. This device is worn on the wrist and contains sensors capable of measuring and recording all movements, including those of very low intensity. An automated speech analysis using artificial intelligence is used to detect low-intensity anomalies, and we want to test whether individual differences correspond to individual differences in brain anatomy and function. Researchers will compare elderly subjects with bipolar disorder and healthy volunteer, age between 70 and 85 years. Participants will be asked to: * Perform an MRI * Complete 3 cognitive tests: verbal memory, verbal fluency and an emotional storytelling task, in which you will be asked to describe a memory orally using positive, negative and neutral emotions. * wear an actimeter on your wrist for 4 days.