Apathy and affective symptoms associated with elevated plasma neurofilament light but not p-tau181 in Alzheimer's disease
INTRODUCTION: Apathy and affective neuropsychiatric symptoms (NPS) are prevalent in Alzheimer's disease (AD), yet their neurobiological cause is still unclear. We examined associations between plasma neurofilament light chain (NfL) and tau pathology (p-tau181) with apathy and affective symptoms in mild cognitive impairment (MCI) and AD dementia. METHODS: This longitudinal study analyzed data from