Axial myoclonus in paraproteinemic polyneuropathy

Area of Science:

• Neurology
• Immunology

Background:

• Describes a rare case of paraproteinemic anti-myelin-associated glycoprotein (anti-MAG) antibody polyneuropathy.
• Highlights the co-occurrence of axial myoclonic jerks in this patient.

Observation:

• Neurophysiological studies revealed asymmetrical axial jerks, exacerbated by recumbency and abolished by arousal or sleep.
• Analysis demonstrated a propriospinal-type propagation of myoclonus originating from the left rectus abdominis.

Findings:

• Plasmapheresis significantly decreased the frequency and intensity of axial myoclonic jerks.
• The study observed an association between propriospinal myoclonus and anti-MAG polyneuropathy.

Implications:

• Suggests a potential, though unconfirmed, causal link between anti-MAG polyneuropathy and propriospinal myoclonus.
• This case may inform future research into the pathophysiology of myoclonus in autoimmune neuropathies.