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Research paper

Acquired aphasia, dementia, and behavior disorder with epilepsy and continuous spike-and-waves during sleep in a child

Canonical early description of acquired aphasia, cognitive regression, and behavior disorder in a child with CSWS. Establishes that CSWS-era behavioral/frontal dysregulation is part of the phenotype itself rather than an incidental comorbidity. Foundational reference for what was later called acquired epileptic frontal syndrome.

Indexed context

Roulet-Perez E, Davidoff V, Despland PA, Deonna T

cswsesesacquired-epileptic-frontal-syndromebehavior-regressionpediatric

Markdown path

content/research/papers/1993-roulet-perez-acquired-epileptic-frontal-syndrome.md

Findings

Canonical early description of acquired aphasia, cognitive regression, and behavior disorder in a child with CSWS. Establishes that CSWS-era behavioral/frontal dysregulation is part of the phenotype itself rather than an incidental comorbidity. Foundational reference for what was later called acquired epileptic frontal syndrome.

Why it may matter for Levi

Historical-clinical grounding for interpreting Levi's pre-pulse behavioral dysregulation as part of the CSWS/DEE-SWAS phenotype, and recovery of the behavioral axis as a meaningful outcome alongside language recovery.

Paper text

Roulet-Perez, Davidoff, Despland, Deonna (1993) — Acquired aphasia, dementia, behavior disorder with CSWS

Source

Why this paper is in the corpus

Roulet-Perez 1993 is the canonical early description of what later became known as acquired epileptic frontal syndrome (AEFS) — a CSWS-related state in which children show prominent frontal-executive and behavioral dysregulation features (disinhibition, hyperactivity, impulsivity) in addition to the more classically recognized language/aphasia features. It is the load-bearing citation when framing the behavioral half of Levi's active-ESES-era phenotype as a recognized clinical entity, and by symmetry when interpreting the behavioral features during recovery.

Key findings

  • Detailed description of a child with acquired aphasia, cognitive regression ("dementia"), and behavior disorder in the setting of CSWS.
  • Highlights that the behavioral/frontal features can be as prominent as the language features, and can dominate the clinical picture.
  • Establishes that CSWS-era behavioral dysregulation is a recognized phenotype, not an incidental comorbidity.
  • Introduces the conceptual framing of CSWS as producing a spectrum of acquired cognitive/behavioral syndromes rather than a single uniform phenotype.

Limitations relevant to Levi

  • Single-case detailed description rather than a cohort study.
  • 1993 predates quantitative sleep-EEG analysis and the SHY framework; the paper's mechanistic reasoning is necessarily observational.
  • Pre-dates modern genetic etiological characterization.

Levi-relevant takeaways

  • Provides the historical precedent for Levi's pre-pulse behavioral dysregulation being part of the CSWS/DEE-SWAS phenotype itself, not a comorbid condition.
  • Implies that recovery of the behavioral axis is as meaningful an outcome as recovery of the language axis — consistent with how Jake and Miki are tracking Levi.
  • Does not directly address the recovery-phase disinhibition patterns that are the current focus; those are addressed in the neurorehabilitation-layer papers.

Citation note

Pair with Veggiotti 2001 (Neurophysiol Clin 31:387-397) for the full "acquired epileptic frontal syndrome" construct, and with Letzkus 2015 for the circuit-level mechanism of disinhibition. This paper contributes the clinical-historical grounding.