Multiple Sclerosis (MS) is the most common acquired neurological disease leading to disability, especially ambulatory, in young adults. To date, the correlation between the number or volume of white matter lesions seen on conventional MRI and the degree of disability of patients remains low to moderate. This phenomenon is known as the "clinical-radiological paradox". In this new project, we hypothesize that an evaluation of the corticospinal pathways including their thoracic medullary portion, as well as taking into account the severity of the lesions using quantitative MRI, will allow the investigators to refine the correlation with ambulatory disability in MS patients. We will complete the evaluation of motor pathways with those of the proprioceptive pathways also strongly involved in ambulation.
Multiple Sclerosis (MS) is the most common acquired neurological disease leading to disability, especially ambulatory, in young adults. To date, the correlation between the number or volume of white matter lesions seen on conventional MRI and the degree of disability of patients remains low to moderate. This phenomenon is known as the "clinical-radiological paradox". The impact of the precise localisation of focal MS lesions on certain circuits particularly involved in ambulation, such as pyramidal or proprioceptive beams, has however been little studied in imaging, mainly due to technical limitations. Indeed, such studies require the acquisition of brain and spinal cord MRI images of sufficient spatial resolution to allow the localisation of focal lesions and pathways. Several previous studies have shown encouraging results by separately studying damage to the brain or spinal cord portion of the corticospinal bundle and relating it to disability. To our knowledge, no studies have analysed the lesional involvement of the cortico-spinal bundle or the entire proprioceptive bundle from the motor cortex to the medullary cone in patients with MS. In a preliminary study, we studied the cerebral spinal cortex and cervical spinal cord bundle using data from the PHRC 2012 EMISEP and obtained encouraging results. In particular, we have shown that the cortico-spinal pathways are very frequently affected by focal lesions in the early years of the disease and that it is already correlated with the functional consequences in patients measured clinically and in electrophysiology. In this new project, we hypothesize that an evaluation of the corticospinal pathways including their thoracic medullary portion, as well as taking into account the severity of the lesions using quantitative MRI, will allow the investigators to refine the correlation with ambulatory disability in MS patients. We will complete the evaluation of motor pathways with those of the proprioceptive pathways also strongly involved in ambulation.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
94
MRI protocol is different, a little bit longer than MRI in routine for patients. For healthy volunteer, a specific MRI for this study is done
Electrophysiology will be done during routine visits for patients and during inclusion visit to healthy volunteers
AP-HM Timone
Marseille, France
CHU Rennes
Rennes, France
association ratio between EDSS score and focal injury fraction at inclusion
EDSS score is a specific multiple sclerosis scale, named Expanded Disability Status Scale, from 0 (normal neurological status) to 10 (death kinked to sclerosis). Focal injury fraction is focal injury volume divided by the volume of goal zone and will be assessed by MRI analysis.
Time frame: 24 months
Correlation between focal lesion load and changes in Expanded Disability Status Scale (EDSS)
Correlation between focal lesion load and changes in Expanded Disability Status Scale (EDSS) during patients follow up. The Expanded Disability Status Scale (EDSS) is a method of quantifying disability in multiple sclerosis and monitoring changes in the level of disability over time. It is widely used in clinical trials and in the assessment of people with MS. The EDSS scale ranges from 0 to 10 in 0.5 unit increments that represent higher levels of disability. Scoring is based on an examination by a neurologist.
Time frame: 24 months
Correlation between the severity of lesions and changes in Expanded Disability Status Scale (EDSS)
Correlation between the severity of lesions and changes in Expanded Disability Status Scale (EDSS) during patients follow up. The Expanded Disability Status Scale (EDSS) is a method of quantifying disability in multiple sclerosis and monitoring changes in the level of disability over time. It is widely used in clinical trials and in the assessment of people with MS. The EDSS scale ranges from 0 to 10 in 0.5 unit increments that represent higher levels of disability. Scoring is based on an examination by a neurologist. The severity of the lesions will be assessed by the volume of the focal lesion load on the motor and sensory pathways, and by the value of the average magnetization transfer ratio (MTR) within the lesions
Time frame: 24 months
Differences in central conduction times between patients and healthy volunteers
Significance of the differences in central conduction time values of motor and somaesthetic evoked potentials and in mean MTR values of motor and sensory pathways, between patients and healthy volunteers. Central conduction time values of motor and somaesthetic evoked potentials in healthy subjects and patients as well as on the averages of MTR (magnetic transfer ratio) values of motor and sensory pathways at the encephalic and medullary level, between patients and healthy volunteers
Time frame: 1 day
Correlation between focal lesion load and changes in Timed 25-Foot Walk Test (T25W)
Correlation between focal lesion load and changes in Timed 25-Foot Walk Test (T25W) during patients follow up. The T25-FW is a quantitative mobility and leg function performance test based on a timed 25-walk. It is the first component of the MSFC to be administered at each visit. The patient is directed to one end of a clearly marked 25-foot course and is instructed to walk 25 feet as quickly as possible. he task is immediately administered again by having the patient walk back the same distance. The score for the T25-FWis the average of the two completed trials.
Time frame: 24 months
Correlation between the severity of lesions and changes in Timed 25-Foot Walk Test (T25W)
Correlation between the severity of lesions and changes in Timed 25-Foot Walk Test (T25W) during patients follow up. The T25-FW is a quantitative mobility and leg function performance test based on a timed 25-walk. It is the first component of the MSFC to be administered at each visit. The patient is directed to one end of a clearly marked 25-foot course and is instructed to walk 25 feet as quickly as possible. he task is immediately administered again by having the patient walk back the same distance. The score for the T25-FWis the average of the two completed trials.The severity of the lesions will be assessed by the volume of the focal lesion load on the motor and sensory pathways, and by the value of the average magnetization transfer ratio (MTR) within the lesions
Time frame: 24 months
Correlation between focal lesion load and changes in Nine Hole Peg Test (9HPT)
Correlation between focal lesion load and changes in Nine Hole Peg Test (9HPT) during patients follow up. The Nine-Hole Peg Test (9HPT) is used to measure finger dexterity in patients with various neurological diagnose. Scores are based on the time taken to complete the test activity, recorded in seconds
Time frame: 24 months
Correlation between the severity of lesions and changes in Nine Hole Peg Test (9HPT)
Correlation between the severity of lesions and changes in Nine Hole Peg Test (9HPT) during patients follow up. The Nine-Hole Peg Test (9HPT) is used to measure finger dexterity in patients with various neurological diagnose. Scores are based on the time taken to complete the test activity, recorded in seconds. The severity of the lesions will be assessed by the volume of the focal lesion load on the motor and sensory pathways, and by the value of the average magnetization transfer ratio (MTR) within the lesions
Time frame: 24 months
Correlation between focal lesion load and changes in walking distance
Correlation between focal lesion load and changes in walking distance using 6-minutes walk test (6MWT) during patients follow up. The score of the test is the distance a patient walks in 6 minutes.
Time frame: 24 months
Correlation between the severity of lesions and changes in walking distance
Correlation between the severity of lesions and changes in walking distance using 6-minutes walk test (6MWT) during patients follow up. The score of the test is the distance a patient walks in 6 minutes. The severity of the lesions will be assessed by the volume of the focal lesion load on the motor and sensory pathways, and by the value of the average magnetization transfer ratio (MTR) within the lesions
Time frame: 24 months
Correlation between focal lesion load and changes in 12-Item Multiple Sclerosis Walking Scale (MSWS12) score
Correlation between focal lesion load and changes in 12-Item Multiple Sclerosis Walking Scale (MSWS12) during patients follow up. The 12-item Multiple Sclerosis Walking Scale (MSWS-12) is a patient-reported outcome that assesses the impact of walking impairment in people with multiple sclerosis. The EQ-5D-3L is a validated, generic, preference-based, health-status measure consisting of five descriptive questions encompassing five domains of HRQoL (mobility, self-care, usual activities, pain/discomfort, anxiety/depression). Each question is answered based on three response options (1= "no problems", 2= "moderate problems", 3= "severe problems"), with the 243 potential patterns of responses enabling classification of a participant into a distinct health state associated with a specific index score.
Time frame: 24 months
Correlation between the severity of lesions and all limbs electrophysiology parameters
Correlation between the severity of lesions and all limbs electrophysiology parameters : Electrophysiology (all 4 limbs) with the central conduction time of motor evoked potentials and the central conduction time of somesthetic evoked potentials. The severity of the lesions will be assessed by the volume of the focal lesion load on the motor and sensory pathways, and by the value of the average magnetization transfer ratio (MTR) within the lesions
Time frame: 24 months
Correlation between in focal lesion load of pathways and changes in Expanded Disability Status Scale
The amount of focal lesion load in the motor and proprioceptive pathways will be correlated with the change in Expanded Disability Status Scale (EDSS) score during patients follow up.
Time frame: 24 months
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