Generalised sensory system abnormalities in amyotrophic lateral sclerosis: a European multicentre study

Area of Science:

• Neuroscience
• Neurology
• Electrophysiology

Background:

• Amyotrophic lateral sclerosis (ALS) is primarily known as a motor neuron disease.
• Emerging evidence suggests sensory nervous system involvement in ALS.
• This study investigates sensory nerve abnormalities in ALS patients.

Purpose of the Study:

• To assess sensory nerve conduction studies (NCS) in a cohort of 88 Amyotrophic Lateral Sclerosis (ALS) patients.
• To determine the prevalence and characteristics of sensory nerve abnormalities in ALS.
• To explore the potential implications of sensory involvement in ALS pathophysiology.

Main Methods:

• A European multicenter study involving seven clinical neurophysiologists.
• Consecutive series of ALS patients were examined.
• Sensory nerve conduction studies (NCS) were performed and peer-reviewed.

Main Results:

• Sensory NCS abnormalities were detected in 20 (22.7%) of the ALS patients.
• A subset of these patients (11, or 12.5%) were diagnosed with electrophysiological polyneuropathy.
• No significant differences in age, disease duration, or onset region were observed between patients with normal and abnormal sensory NCS.

Conclusions:

• Findings corroborate previous reports of sensory system involvement in ALS.
• The presence of sensory nerve abnormalities may indicate a variant form of ALS.
• ALS with generalized sensory abnormalities could involve degeneration of both motor neurons and dorsal root ganglion cells.