ELAVL4 and Parkinson disease: For example, ELAVL2 has been linked to learning and memory formation, autism spectrum disorder and schizophrenia [48, 49, 67]; ELAVL3 has been linked to amyotrophic lateral sclerosis (ALS) and cerebellar ataxia [68, 69]; ELAVL4 has been linked to AD and PD [50, 70, 71].