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This study aims to explore the contributions of neuromarketing to marketing in the customer's purchasing decision-making process from a theoretical perspective based on a literature review. The methodology begins with the selection of scientific articles from Elsevier's Scopus database using the following search equation: TILTE ("neuromarketing"), which indicates publications that included the term neuromarketing in their titles. The study population consisted of 263 publications, from which a sample of 21 articles that met the criterion of 50 or more citations was selected. The results show a thematic map with four document grouping clusters: Cluster 1 addresses topics related to consumer behavior and psychological pricing, while Cluster 2 covers topics associated with perceptions of neuromarketing and neuroscience. Cluster 3 refers to people's emotional reactions, market research, and food marketing. The fourth cluster defines concepts related to neuroergonomics and neurogastronomy. It is concluded that neuromarketing allows us to understand consumer behavior, since through neuroscience it is able to study customer behavior in relation to the stimuli that they may have when faced with an advertisement.