[Amyotrophic lateral sclerosis in totally locked-in state]

Area of Science:

• Neuropathology
• Neuroscience
• Genetics

Context:

• Amyotrophic Lateral Sclerosis (ALS) is a progressive neurodegenerative disease.
• Totally Locked-in State (TLS) represents the most severe form of ALS, characterized by complete immobility and inability to communicate.
• Understanding neuropathological changes in TLS is crucial for disease progression insights.

Purpose:

• To conduct a neuropathological examination of the brains of seven patients diagnosed with ALS in a TLS.
• To identify and characterize the specific brain regions and pathways affected by the neurodegenerative process in TLS patients.
• To correlate genetic findings (familial, SOD1 mutation, sporadic) with observed neuropathological alterations.

Summary:

• Seven autopsy brains from patients with ALS in TLS were analyzed.
• All cases exhibited marked degeneration of the brain stem tegmentum.
• Lesions consistently involved tracts responsible for somatic sensory and auditory processing.

Impact:

• This study highlights specific neuropathological hallmarks in ALS patients with TLS.
• Findings underscore the severe impact of ALS on brain stem structures controlling sensory and motor functions.
• Provides a basis for future research into mechanisms and potential therapeutic targets for advanced ALS stages.