Omidi, Shirin Jamal

Leucine-rich glioma-inactivated-1 (LGI1) IgG-associated autoimmune encephalitis typically presents with faciobrachial dystonic seizures, hyponatremia, and temporal lobe MRI abnormalities. However, the clinical spectrum of LGI1 IgG-associated AE extends beyond these classical features, with reports of diverse seizure semiologies and atypical presentations challenging traditional diagnostic paradigms. This study reports a male in his late 60s presenting with recurrent episodes of right foot cramping and electric shock-like pain, progressing to generalized tonic-clonic seizures. Initial workup suggested chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), but LGI1 IgG antibodies were subsequently detected. Despite treatment with intravenous immunoglobulin (IVIG), the seizures persisted. This case highlights the heterogeneity in LGI1 encephalitis presentations. The patient’s proprioceptive-induced reflex seizures represent a rare manifestation of the disease. Treatment with rituximab, a B-cell depleting therapy, resulted in significant improvement, suggesting its potential effectiveness in LGI1 encephalitis with a resistant seizure course. The case also emphasizes the intricate interplay between the mesial temporal lobe, basal ganglia, and frontal regions in LGI1 encephalitis pathophysiology.

AbstractAlthough electricity has been used in medicine for thousands of years, bioelectronic medicine for treating epilepsy has become increasingly common in recent years. Invasive neurostimulation centers primarily around three approaches: vagus nerve stimulation (VNS), responsive neurostimulation (RNS), and deep brain stimulation (DBS). These approaches differ by target (e.g., cranial nerve, cortex, or thalamus) and stimulation parameters (e.g., triggered stimulation or continuous stimulation). Although typically noncurative, these approaches can dramatically reduce the seizure burden and offer patients new treatment options. There remains much to be understood about optimal targets and individualized stimulation protocols. Objective markers of seizure burden and biomarkers that quickly quantify neural excitability are still needed. In the future, bioelectronic medicine could become a curative approach that remodels neural networks to reduce pathological activity.