CSF Tau and Amyloid Biomarkers in Cognitive Impairment Across the ALS–FTD Spectrum: A Systematic Narrative Review and Evidence Map
Cognitive impairment is an important non‐motor manifestation of amyotrophic lateral sclerosis (ALS), particularly across the ALS–frontotemporal dementia (ALS–FTD) spectrum. Cerebrospinal fluid (CSF) tau and amyloid biomarkers may reflect nonspecific neurodegenerative injury, concomitant Alzheimer disease (AD) pathology...