Coma
Conditions
Keywords
Brain-damaged, Disorders of consciousness, Post-coma, consciousness, coma, vegetative state, minimally conscious state, music, P300
Brief summary
Exposure to music improves cognitive function in 'healthy' participants and in brain-damaged patients. However, it is still difficult to understand what precisely in music causes a positive effect : are they emotional components, familiarity or preference which improve cognition or is there any specific effect of music? Moreover, it is not yet possible to characterize the neural and functional links between the brain systems solicited by music and those associated with other cognitive functions enhanced by music. Finally, researches on brain-damaged patients have not exploited the potential effect of music on the level of alert and perceptual awareness, while this type of stimulation could be a valuable tool to improve cognition in patients with a disturbance of consciousness and alertness. The main objective is to describe the impact of music on the brain's response to self-referential or neutral stimuli in brain-damaged patients with persistent consciousness disorder after a coma and in healthy participants.
Interventions
OTHERElectroencephalography (EEG)
EEG will be performed to assess brain activity in response to sounds of different nature, including music and the given name of the registered person
Sponsors
Hospices Civils de Lyon
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
Yes
Inclusion criteria
Brain-damaged patients : Inclusion Criteria: * Disorders of consciousness (Traumatic brain injury, stroke or anoxic encephalopathy) * Coma diagnosis (Plum and Posner, 1966), vegetative state (Task Force, 1994) or minimally conscious state (Giacino, Ashwal et al. 2002) * Lack of autonomic crisis since one week minimum * Medical condition considered stable * Patients who do not present hearing loss. Peaks I and II of Brainstem Auditory Evoked Potentials (BAEP) will be normal.
Exclusion criteria
* Hearing Problem * Uncontrolled Epilepsy * Autonomic crises * Medical unstable state * Pregnant or likely to be (interrogation data) or breastfeeding woman Healthy participants : Inclusion Criteria: * Subjects with normal hearing * Absence of neurological disorder * Subjects able to understand the experimental instructions
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| P300 response in brain-damaged patients | 24 hours after inclusion | Improvement of the P300 response (increase in amplitude and / or a decrease in latency) to the first name pronunciation will be assessed in patients in coma, in a vegetative state or in a minimally conscious state, when it is preceded by a favorite or familiar sound (music, language, environmental noise) and / or a positive emotional connotation, compared to a control condition (unfamiliar sound and / or neutral emotional connotation). This improvement in brain response will be the sign of a more efficient categorization of patient's own name. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| P300 response in healthy volunteers | 24 hours after inclusion | Improvement of the P300 response (increase in amplitude and / or a decrease in latency) to a self-referential stimulation (eg first name pronunciation) compared to a non-self-referential stimulation (eg other name) will be assessed in healthy participants when it is preceded by a favorite or familiar sound (music, language, environmental noise) and / or a positive emotional connotation, compared to a control condition (sound unfamiliar and / or neutral emotional connotation) |
| P300 response in brain-damaged patients | 24 hours after inclusion | Increase of the P300 response (increase in amplitude and / or a decrease in latency) to a self-referential stimulation (e.g. name pronunciation) will be assessed when the patient is awake (according to EEG measures and / or eye opening) compared to when the patient is asleep (according to EEG measures and / or eye closure). |
| Medial prefrontal cortex activity level in healthy volunteers | 24 hours after inclusion | Increase of the level of activity measured in the medial prefrontal cortex will be assessed in healthy participants after a favorite or familiar sound (music, language, environmental noise) and / or a positive emotional connotation, compared to a control condition (unfamiliar sound and / or neutral emotional connotation). |
Countries
France
Outcome results
None listed