Periodic Jaw-Opening Myoclonus in Subacute Sclerosing Panencephalitis

Garg, Divyani; Kumar, Ashna; Sharma, Suvasini

doi:10.14802/jmd.23015

Cited by 3 publications

(2 citation statements)

References 7 publications

(10 reference statements)

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“…93 Recently, jaw opening myoclonus has been emphasized in SSPE. 83,94,95 One patient with craniocervical myoclonus persisting as the only symptom of SSPE for more than 3 years has been reported. 96 The myoclonus of SSPE is not considered to be stimulus sensitive, unlike progressive myoclonic epilepsies.…”

Section: Sspe As An Autoimmune Encephalitis Mimicmentioning

confidence: 99%

Movement Disorders in Patients with Subacute Sclerosing Panencephalitis: A Systematic Review

Garg,

Patel,

Sankhla

et al. 2024

Movement Disord Clin Pract

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BackgroundSubacute sclerosing panencephalitis (SSPE) is a complication of measles, occurring after a latency of 4–10 years. It continues to occur in developing countries although resurgence is being reported from developed countries. Characteristic features include progressive neuropsychiatric issues, myoclonus, seizures, movement disorders and visual impairment. Electroencephalography (EEG) typically shows periodic generalized discharges, and elevated CSF anti‐measles antibodies are diagnostic. Movement disorders are being increasingly recognized as part of the clinical spectrum, and range from hyperkinetic (chorea, dystonia, tremor, tics) to hypokinetic (parkinsonism) disorders and ataxia.ObjectivesThis article aims to comprehensively review the spectrum of movement disorders associated with SSPE.MethodsA literature search was conducted in PubMed and EMBASE databases in December 2023 and articles were identified for review.ResultsMovement disorders reported in SSPE included hyperkinetic (chorea, dystonia, tremor and tics), hypokinetic (parkinsonism), ataxia and extraocular movement disorders. Myoclonus, a core clinical feature, was the most frequent “abnormal movement.” Movement disorders were observed in all clinical stages, and could also be a presenting feature, even sans myoclonus. Hyperkinetic movement disorders were more common than hypokinetic movement disorders. An evolution of movement disorders was observed, with ataxia, chorea and dystonia occurring earlier, and parkinsonism later in the disease. Neuroradiological correlates of movement disorders remained unclear.ConclusionA wide spectrum of movement disorders was observed throughout the clinical stages of SSPE. Most data were derived from case reports and small case series. Multicentric longitudinal studies are required to better delineate the spectrum and evolution of movement disorders in SSPE.

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Section: Sspe As An Autoimmune Encephalitis Mimicmentioning

confidence: 99%

Movement Disorders in Patients with Subacute Sclerosing Panencephalitis: A Systematic Review

Garg,

Patel,

Sankhla

et al. 2024

Movement Disord Clin Pract

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“…Movement disorders are seen in up to half of all patients with SSPE [ 1 ]. We have recently reported jaw myoclonus for the first time in SSPE [ 2 ] and have subsequently observed it in other patients.…”

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confidence: 99%