The Neurology of Aging: Beyond the Brain!

The latest research on the neurology of aging beyond the brain where peripheral and autonomic systems may act as key drivers of decline.

All this in ‘Plain English! Just Ask the Doc!

Recent studies show neuromuscular junction (NMJ) failure contributes to sarcopenia: age-related loss of the sodium channel NaV1.4 impairs nerve-to-muscle signal transmission, correlating with weakness. This is potentially reversible??"ClC-1 chloride channel inhibition restored muscle responsiveness and strength in aged models. A 2025 theory posits sympathetic-parasympathetic imbalance (excess “fight-or-flight,� reduced “rest-and-repair�) as a core driver of aging hallmarks like inflammation, mitochondrial dysfunction, and senescence, with vagus nerve stimulation proposed as a countermeasure.

Peripheral nerves also age via reduced fiber/glial density, senescent Schwann cells that hinder regeneration, and inflammaging. Some Alzheimer’s-related motor issues may even originate at the NMJ independently of the brain. These findings shift focus toward targeting peripheral neural interfaces for healthier aging.

Speaker: Allan Bernstein, Neurologist