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Benign myoclonus of early infancy involves brief jerks in infants aged 4-9 months with normal neurological exams. This condition has a good prognosis, distinguishing it from West syndrome.
Area of Science:
- Pediatrics
- Neurology
- Developmental Pediatrics
Context:
- Presents a follow-up study of infants diagnosed with benign myoclonus of early infancy.
- Analyzes a personal series of 18 children with long-term follow-up (4-16 years).
- Addresses the differential diagnosis of infantile spasms and related neurological conditions.
Purpose:
- To re-evaluate the diagnosis and prognosis of benign myoclonus of early infancy.
- To differentiate benign myoclonus from cryptogenetic cases of West syndrome.
- To provide long-term follow-up data supporting the benign nature of this condition.
Summary:
- Describes infants presenting with repeated head and arm jerks between 4-9 months of age.
- Highlights normal neurological examinations and normal electroencephalograms (EEGs) in affected infants.
- Reports a favorable long-term outcome for infants diagnosed with benign myoclonus of early infancy.
Impact:
- Establishes the benign nature and excellent prognosis of benign myoclonus of early infancy.
- Provides crucial information for clinicians to differentiate benign myoclonus from more severe epileptic syndromes like West syndrome.
- Contributes to a better understanding of early infantile movement disorders and their developmental trajectories.
Abstract:
In 1976/77 we presented a group of small infants starting between four and nine months of age with repeated jerks of head and arms. They showed no neurological abnormalities and several EEGs in each case were normal. The term "benign myoclonus of early infancy" was proposed. Differential diagnosis are discussed in this paper, as a larger personal series of 18 children with a follow-up during four to sixteen years is analyzed. Special emphasis is given to good prognosis of "benign myoclonus of early infancy" and the differences with cryptogenetic cases of West syndrome.