Study of Sleep Inertia in Major Depressive Disorder by the Psychomotor Vigilance Task

Inclusion criteria

• The patient must have given their free and informed consent and signed the consent form
• The patient must be a member or beneficiary of a health insurance plan
• Ability to understand, write and read French Inclusion criteria for patients with major depression
• Diagnosis of depression according to DSM-5 criteria
• Suspicion of a sleep disorder requiring polysomnographic screening
• Score for IHSS items 3 and 4

• Score ≥ 1 for group with sleep inertia
• Score = 0 for the group without sleep inertia Inclusion criteria for controls
• No complaints of sleep inertia (score = 0 on IHSS items 3 and 4)
• No excessive daytime sleepiness (Epworth Sleepiness Scale score ≤10),
• No depressive symptoms (Hospital Anxiety Depression Scale score < 8 on items 2, 4, 6, 8, 10, 12, 14).

Exclusion criteria

• The patient is participating in an interventional study
• The patient is under safeguard of justice or state guardianship
• Unweaned from the following medications for at least 5 half-lives prior to inclusion: wake-promoting or psychostimulant drugs (modafinil, methylphenidate, mazindol, amphetamine, pitolisant, solriamfetol, sodium oxybate), neuroleptics, hypnotics, antidepressants, anxiolytics, antiepileptics, budipine, dopamine agonist and antagonist antiemetics (except domperidone), opiates, gabapentin, pregabalin, benzodiazepines, Z-hypnotics (zolpidem and zopiclone), monoamine oxidase inhibitors, catechol-O-methyltransferase or sedative antihistamines.
• Patients with central nervous system diseases: Parkinson's disease, mild cognitive impairment and dementia, progressive supranuclear palsy, multisystem atrophy, Huntington's chorea, amyotrophic lateral sclerosis, epilepsy, history of head trauma with loss of consciousness.
• Patients with a malignant neoplastic disease requiring therapeutic treatment in the 12months prior to the screening visit
• Other medical or psychiatric illnesses (with the exception of depression in he depression group) which, in the investigator's opinion, could interfere with the study.
• History of suicide attempt (including failed attempt), or suicidal ideation in the past month
• Chronic alcohol consumption or drug abuse in the previous 6 months
• Sleep-wake circadian rhythm disorders and presence of sleep insufficiency according to ICSD-3 criteria
• Pregnant, parturient or breast-feeding women.