Functional Movement Disorders (Part 1): Functional Jerks and Functional Myoclonus
Functional Jerks
Video 15.1 (C15c1): Functional Generalized Jerks
Variable jerking movements of the head, trunk, pelvis, and right hand with gait-triggered tremulousness.
Video 15.2 (C15c2): Functional Facial and Cervical Jerks
Variable neck jerks associated with downward eyebrow and mouth pulling.
Video 15.3 (C15c3): Functional Whole-Body Jerks
Continuous jerking of the trunk, head, arms, and legs exacerbated by standing and writing.
Video 15.4 (C15c4): Functional Jerks with Astasia-Abasia
Jerks suppressed by mental distraction and accompanied by highly incongruent gait impairment.
Video 15.5 (C15c5): Functional Multifocal Jerks
Asynchronous limb and truncal jerks with tremulous, pseudo-asterixis-like movements.
Video 15.6 (C15c6): Functional Propriospinal-Like Jerks
Generalized body jerks mimicking propriospinal myoclonus but demonstrating preparatory movements and nonphysiologic spread.
Video 15.7 (C15c7): Functional Hyperkinetic Movement Disorder
Continuous twisting, posturing, clapping, and inability to remain still in the context of psychosocial stress.
Video 15.8 (C15c8): Functional Violent Whole-Body Jerks
Frequent generalized violent jerks involving neck, trunk, arms, and vocalization.
Video 15.9 (C15c9): Functional Jerks with Distractibility
Small-amplitude hand jerks evolving into dramatic bilateral arm jerks responsive to distraction.
Video 15.10 (C15c10): Functional Tremor and Jerks
Distractible intermittent jerks and tremor paradoxically improving during challenging tasks.
Video 15.11 (C15c11): Functional Jerking Episode with Convergence Spasm
Paroxysmal violent flailing movements followed by convergence spasm.