Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.10/681
Título: Involuntary rhythmic leg movements time-locked with the respiratory cycle
Autor: Leal, A
Calado, E
Palavras-chave: Criança
Ressonância magnética nuclear
Magnetic resonance imaging
Data: 2001
Editora: Elsevier
Citação: Pediatr Neurol. 2001 Nov;25(5):405-8.
Resumo: Involuntary rhythmic leg movements in childhood is an uncommon condition, the generators of which remain unknown. We report on a male 3 years of age with distinct features providing important clues concerning the location of one of these generators. At the age of 7 months, the previously healthy young male started with low frequency, rhythmic, and continuous (both during wakefulness and sleep) flexion/extension movements of the lower limbs. Movements interfered significantly with gait acquisition, and, despite normal cognitive development, he was able to walk only at age 2 years, 4 months. The neurologic examination revealed the absence of automatic stepping in the neonatal period, but was otherwise normal. A polygraphic electroencephalogram/electromyogram (EEG/EMG) recording, at the age of 2 years, 9 months, revealed rhythmic and synchronous legs with EMG activity at 0.5 Hz. A more complete polygraphic recording at the age of 3 years, 10 months, showed a lower frequency (0.35 Hz) for the movements, which were time-locked with the respiratory cycle. Magnetic resonance imaging (MRI) of the brain revealed an increased T(2) signal in the upper medulla-lower pons regions. The generator of the rhythmic legs movements is postulated to be the respiratory center, connecting with the reticulospinal projecting neurons through an aberrant pathway.
Peer review: yes
URI: http://hdl.handle.net/10400.10/681
ISSN: 0887-8994
Aparece nas colecções:NEU - Artigos

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