GoshenBiotech, Inc. 1 article published in JoVE Neuroscience Intracerebroventricular Injection of Amyloid-β Peptides in Normal Mice to Acutely Induce Alzheimer-like Cognitive Deficits Hye Yun Kim1,2, Dongkeun K. Lee1, Bo-Ryehn Chung1,3, Hyunjin V. Kim1,4, YoungSoo Kim1,4 1Center for Neuro-Medicine, Korea Institute of Science and Technology, 2Research Institute, GoshenBiotech, Inc., 3Department of Chemical and Biological Engineering, Princeton University, 4Biological Chemistry Program, Korea University of Science and Technology The amyloid-β (Aβ)-injected animal model enables the administration of a defined quantity and species of Aβ fragments and reduces individual differences within each study group. This protocol describes the intracerebroventricular (ICV) injection of Aβ without stereotactic instruments, enabling the production of Alzheimer-like behavioral abnormalities in normal mice.