Nondeclarative associative learning in Alzheimer's disease: An overview of eyeblink, fear, and other emotion-based conditioning

•Alzheimer's disease is a neurodegenerative disorder that affects cognitive functions, particularly declarative memory.•Nondeclarative associative learning, such as motor, fear, and emotion-based learning, involve distinct neural structures and are also affected by Alzheimer's disease.•Eyeblink conditioning, fear conditioning, and other emotion-based learning in Alzheimer's disease are investigated in this review.•Evidence suggests that some forms of nondeclarative associative learning such as eyeblink and fear conditioning are impaired in Alzheimer's disease, whereas emotion-based learning may be relatively preserved.•The review highlights the importance of studying nondeclarative associative learning in Alzheimer's disease to better understand the disease progression and develop new intervention strategies.