The 'Neuron Activation' meme, also frequently referred to as 'Monkey Sees Action,' features a three-panel sequence showcasing a simplified anatomical drawing of a monkey's brain. The meme typically depicts a stimulus—often something shiny, attractive, or relatable—followed by a literal 'flash' of activity in the monkey's brain labeled 'Neuron activation.' Originally derived from an illustration by artist @p_men8 in 2018, it evolved into a viral sensation on Twitter and Reddit by late 2020. It is widely used to satirize the predictable, almost Pavlovian way that people react to specific interests, niche hobbies, or visual triggers on the internet, highlighting our more 'primitive' side.