Electrophysiological Characteristics and Anatomical Differentiation of Epileptic and Non-epileptic Myoclonus.
Study Details
Study Description
Brief Summary
This study was conducted on a series of patients with myoclonus to identify the electrophysiological characteristics and the anatomical classification of myoclonus of different causes.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Detailed Description
The current study included 50 patients with different types of myoclonus in comparison to 30 control subjects. Electrophysiological study was done for all patients by Somatosensory Evoked Potential (SSEP) and Electroencephalography (EEG) while the control group underwent SSEP. SSEP was studied in the patients and control group by stimulation of right and left median nerves.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Epileptic myoclonus Juvenile Myoclonic Epilepsy and Progressive Myoclonic Epilepsy |
Diagnostic Test: Somatosensory evoked potential
Stimulation of the right and left median nerves for each subject were carried out with electrical square wave pulses of 0.2 ms duration applied at a rate of 5 HZ. with cathode proximally. The intensity of the stimulus was adjusted to produce minimal twitches of the thumb (1-2 cm thumb movement). Five hundred (500) stimuli were delivered. The recording electrode picked up the responses. They were then summated and averaged.
The final evoked potential was then displayed on the screen. When two reproducible SEPs responses were obtained the data was accepted for analysis. The graph was printed out on paper, for the purpose of simplification only one response was printed out.
|
| Non-epileptic myoclonus (secondary) Post hypoxic myoclonus, Post ischemic stroke myoclonus, Hepatic, Chronic kidney disease, and Drug induced myoclonus |
Diagnostic Test: Somatosensory evoked potential
Stimulation of the right and left median nerves for each subject were carried out with electrical square wave pulses of 0.2 ms duration applied at a rate of 5 HZ. with cathode proximally. The intensity of the stimulus was adjusted to produce minimal twitches of the thumb (1-2 cm thumb movement). Five hundred (500) stimuli were delivered. The recording electrode picked up the responses. They were then summated and averaged.
The final evoked potential was then displayed on the screen. When two reproducible SEPs responses were obtained the data was accepted for analysis. The graph was printed out on paper, for the purpose of simplification only one response was printed out.
|
Outcome Measures
Primary Outcome Measures
- Somatosensory evoked potential [24-72 hours]
Stimulation of the right and left median nerves for each subject were carried out with electrical square wave pulses of 0.2 ms duration applied at a rate of 5 HZ. with cathode proximally. The intensity of the stimulus was adjusted to produce minimal twitches of the thumb (1-2 cm thumb movement). Five hundred (500) stimuli were delivered. The recording electrode picked up the responses. They were then summated and averaged. The final evoked potential was then displayed on the screen. When two reproducible SEPs responses were obtained the data was accepted for analysis. The graph was printed out on paper, for the purpose of simplification only one response was printed out.
Eligibility Criteria
Criteria
Inclusion Criteria:
- Myoclonus classified into primary and secondary myoclonus.
Exclusion Criteria:
- Psychiatric comorbidity to exclude psychological myoclonus.
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Mansoura University Hospital | Mansoura | Dakahlia | Egypt | 35516 |
Sponsors and Collaborators
- Mansoura University Hospital
Investigators
- Principal Investigator: Esmael Ahmed, MD, Assistant Prof of Neurology
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- Mansoura University 11