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Published on: February 10, 2020
Rhythmic rocking stereotypies in frontal lobe seizures: A quantified video study
Jen-Cheng Hou1, Monique Thonnat1, Raoul Huys2
1INRIA Sophie Antipolis - Méditerranée, université Nice Côte d'Azur, 06902 Valbonne, France.
Objectives:
Rhythmic, stereotyped movements occur in some epileptic seizures. We aimed to document time-evolving frequencies of antero-posterior rocking occurring during prefrontal seizures, using a quantitative video analysis.
Methods:
Six seizures from 3 patients with prefrontal epilepsy yet different sublobar localizations were analyzed using a deep learning-based head-tracking method.
Results:
Mean rocking frequency varied between patients and seizures (0.37-1.0Hz). Coefficient of variation of frequency was low (≤12%).
Discussion:
Regularity of body rocking movements suggests a mechanism involving intrinsic oscillatory generators. Since localization of seizure onset varied within prefrontal cortex across patients, altered dynamics converging on a "final common pathway" of seizure propagation involving cortico-subcortical circuits is hypothesized.
