- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01495897
Abnormal Movements, Cerebellum and Sensorimotor : Oculomotor Study (MOUVADOC)
Adaptation Sensorimotrice, Cervelet et Mouvements Anormaux: Projet d'étude Oculomotrice
Dystonia is a movement disorder characterized by involuntary, sustained, often repetitive muscle contractions of opposite muscles that lead to abnormal twisting movements or odd postures. Essential tremor is a slowly progressive neurologic disorder characterized by the appearance of a tremor during the voluntary movement. The pathophysiology of dystonia or essential tremor is not fully elucidated. Dystonia and essential tremor are associated with dysfunction of the sensorimotor basal ganglia-cortical network and involvement of the cerebellum and cerebellar pathways has also been recently suggested.
The investigators propose to study 30 patients having a primary dystonia (15 DYT11 genetically documented), 15 patients having an essential tremor without deep brain stimulation and 15 patients having an essential tremor with deep brain stimulation.A group of 30 healthy volunteers will be recruited and tested according to the same modalities. They will be paired in sex and age. 30 patients having a Parkinson disease will be also tested.
Eye position will be sampled with a video-based monocular eye tracker (SMI, Germany) before and immediately after an adaptation task. Saccade adaptation is evaluated as the percentage change in the mean saccade amplitude between pre-test and post-test.
Expected results:
- no or fewer alteration of the performance to the adaptation task in the Parkinson group than in the Essential Tremor group/ dystonia group.
- abnormal reactive saccade backward adaptation in the Dystonia group and Essential Tremor group, providing further neurophysiological evidence of cerebellar dysfunction.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Dystonia is a movement disorder characterized by involuntary, sustained, often repetitive muscle contractions of opposite muscles that lead to abnormal twisting movements or odd postures. Essential tremor is a slowly progressive neurologic disorder characterized by the appearance of a tremor during the voluntary movement. High frequency stimulation of the ventral intermedius nucleus (Vim) of the thalamus, relay for the cerebellar output, is successfully used for the treatment of severe essential tremor. It occasionally induces adverse event such as balance disorders or cerebellar symptoms. The pathophysiology of dystonia or essential tremor is not fully elucidated. Dystonia and essential tremor are associated with dysfunction of the sensorimotor basal ganglia-cortical network and involvement of the cerebellum and cerebellar pathways has also been recently suggested. It seems that dystonia and essential tremor could be the result of basal ganglia or cerebellar dysfunction, or from dysfunction of structures controlled at the same time by the cerebellum and the basal ganglia.
methodology: We propose to study 30 patients having a primary dystonia (15 DYT11 genetically documented), 15 patients having an essential tremor without deep brain stimulation and 15 patients having an essential tremor with deep brain stimulation.
A group of 30 healthy volunteers will be recruited and tested according to the same modalities. They will be paired in sex and age. 30 patients having a Parkinson disease will be also tested.
The subjects will be seated in darkness facing a screen located 60 cm before their eyes, their chin on a chin strap and their forehead placed against a frontal support. Eye position is sampled at 500 Hz with a video-based monocular eye tracker (SMI, Germany). Each recording session start with a calibration test in which the subjects looked at nine consecutive targets covering the entire visual field, as used during the oculomotor paradigms: four experimental conditions: a visually guided saccade task, a pre-test, a backward adaptation task, and a post-test. The pre-test and post-test (40 trials each) are performed before and immediately after the backward adaptation task, in the same conditions, except that the target was extinguished when the velocity threshold (150°/s for 10 ms) is reached, instead of jumping to a new location. This avoided any post-saccadic visual feedback that would counteract the adaptive mechanism. Saccade adaptation is evaluated as the percentage change in the mean saccade amplitude between the pre-test and post-test.
Expected results:
- no or fewer alteration of the performance to the adaptation task in the Parkinson group than in the Essential Tremor group/ dystonia group.
- abnormal reactive saccade backward adaptation in the Dystonia group and Essential Tremor group, providing further neurophysiological evidence of cerebellar dysfunction.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
-
Paris, France, 75013
- : Fédération des Maladies du Système Nerveux
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion criteria:
- Age ≥18 years
- -normal cognitive functions (>24y)
- Normal clinical examination of ocular mobility, visualization of the target
- No drug potentially able to modify and to influence the data: anti-depressants, neuroleptics, anti-emetics, amphetamines, anti myoclonic/dystonic drugs, alcohol, dopaminergic drug, antiepileptic.
- Dystonia or essential tremor or Parkinson: diagnostic made by a neurologist
- For DYT11: mutation in SGCE gene.
- For dystonia: No secondary dystonia
- For Parkinson : UPDRS<28
- No other neurological disorder
For the patient having deep brain stimulation:
- Duration of stimulation> 6 months
- Cerebral imagery post operation made
- Stimulation parameter stable since 3 months at least.
- Usual stop of the stimulation during the night
Exclusion criteria:
- Uncontrollable medical problems not related to M-D
- Current active psychiatric disorder
- Intake during the last 3 days of drugs potentially able to modify and to influence the data: anti-depressants, neuroleptics, anti-emetics, amphetamines, anti myoclonic/dystonic drugs, alcohol, dopaminergic drug
- Subjects legally protected.
- Subjects who are not enrolled at social security.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Other: Healthy
Healthy volunteers
|
Device: studying Saccadic eye movements with a video eye tracker: The subjects are seated in darkness facing a screen located 60 cm before their eyes, their chin on a chin strap and their forehead placed against a frontal support.
Eye position is sampled at 500 Hz with a video-based monocular eye tracker (SMI, Germany).
Each recording session start with a calibration test in which the subjects looked at nine consecutive targets covering the entire visual field, as used during the oculomotor paradigms: four experimental conditions: a visually guided saccade task, a pre-test, a backward adaptation task, and a post-test.
The pre-test and post-test (40 trials each) are performed before and immediately after the backward adaptation task, in the same conditions, except that the target was extinguished when the velocity threshold (150°/s for 10 ms) is reached, instead of jumping to a new location.
|
Experimental: Dystonia
patients with Primary Dystonia
|
Device: studying Saccadic eye movements with a video eye tracker: The subjects are seated in darkness facing a screen located 60 cm before their eyes, their chin on a chin strap and their forehead placed against a frontal support.
Eye position is sampled at 500 Hz with a video-based monocular eye tracker (SMI, Germany).
Each recording session start with a calibration test in which the subjects looked at nine consecutive targets covering the entire visual field, as used during the oculomotor paradigms: four experimental conditions: a visually guided saccade task, a pre-test, a backward adaptation task, and a post-test.
The pre-test and post-test (40 trials each) are performed before and immediately after the backward adaptation task, in the same conditions, except that the target was extinguished when the velocity threshold (150°/s for 10 ms) is reached, instead of jumping to a new location.
|
Experimental: Parkinson
patients with Parkinson's disease
|
Device: studying Saccadic eye movements with a video eye tracker: The subjects are seated in darkness facing a screen located 60 cm before their eyes, their chin on a chin strap and their forehead placed against a frontal support.
Eye position is sampled at 500 Hz with a video-based monocular eye tracker (SMI, Germany).
Each recording session start with a calibration test in which the subjects looked at nine consecutive targets covering the entire visual field, as used during the oculomotor paradigms: four experimental conditions: a visually guided saccade task, a pre-test, a backward adaptation task, and a post-test.
The pre-test and post-test (40 trials each) are performed before and immediately after the backward adaptation task, in the same conditions, except that the target was extinguished when the velocity threshold (150°/s for 10 ms) is reached, instead of jumping to a new location.
|
Experimental: Essential tremor
patients with essential tremor with or without deep brain stimulation
|
Device: studying Saccadic eye movements with a video eye tracker: The subjects are seated in darkness facing a screen located 60 cm before their eyes, their chin on a chin strap and their forehead placed against a frontal support.
Eye position is sampled at 500 Hz with a video-based monocular eye tracker (SMI, Germany).
Each recording session start with a calibration test in which the subjects looked at nine consecutive targets covering the entire visual field, as used during the oculomotor paradigms: four experimental conditions: a visually guided saccade task, a pre-test, a backward adaptation task, and a post-test.
The pre-test and post-test (40 trials each) are performed before and immediately after the backward adaptation task, in the same conditions, except that the target was extinguished when the velocity threshold (150°/s for 10 ms) is reached, instead of jumping to a new location.
Device: studying Saccadic eye movements with a video eye tracker.
If the patient has deep brain stimulation, recording will be made in the morning, before the usual morning start of the deep brain stimulation.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Saccadic adaptation
Time Frame: between the pre-test and post-test, maximum 4 hours
|
Saccadic adaptation, evaluated as the percentage of changes in the mean saccade amplitude between the pre-test and post-test.
|
between the pre-test and post-test, maximum 4 hours
|
Characteristics of the saccade
Time Frame: measured during the analysis of the recorded session, maximum 4 hours
|
latency, velocity, duration of the saccade
|
measured during the analysis of the recorded session, maximum 4 hours
|
Collaborators and Investigators
Investigators
- Study Director: Emmanuel Flamand-Roze, MD, PhD, Institut National de la Santé Et de la Recherche Médicale, France
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- C10-18
- 2010-A00740-39 (Other Identifier: Afssaps)
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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