What is Stimulus Screen?

Stimulus Screen, also called Juice Reward Mechanism Monkey, is a lab diagram of a rhesus monkey wired to recording gear, staring at a screen and receiving juice as a reward, reused as a self-deprecating meme about screen addiction.

Where did Stimulus Screen come from?

The figure appeared in a 2011 Cognitive Neurophysiology Laboratory paper on the neuronal basis of self-motion perception and was reused in 2012 Reed College course materials on addiction before @shack_diesel posted it on Twitter in June 2020.

What does Stimulus Screen mean?

The monkey stands in for the poster; the stimulus screen is whatever game, feed or video they are glued to, and the juice is their reward of choice, often an energy drink or soda.

How do you use Stimulus Screen?

Keep the diagram and its arrows, then swap the labels or photoshop the screen and juice container to match a specific habit, as mememonk_ did with 'literally me syndrome' in 2022.

Is Stimulus Screen still popular?

It saw heavy exploitable use through early 2023, when monkey.posting's repost passed 17,000 likes in a day, and still shows up as a shorthand for dopamine-driven screen habits.

Stimulus Screen

2020image macrosemi-active

Published November 2, 2026

Stimulus Screen, also known as Juice Reward Mechanism Monkey, is a scientific diagram of a rhesus macaque wired to a recording electrode, staring at a monitor, and receiving juice as a reward. The figure began life in a 2011 Cognitive Neurophysiology Laboratory study on self-motion perception, then went viral in June 2020 after @shack_diesel reposted it on Twitter without context. By late 2022, Instagram remix accounts were photoshopping it into bits about 'literally me syndrome' and the 'YouTube without eating' meme.

science chart memes self deprecating memes exploitable templates primate memes delayed virality memes

Overview

The gag works because the clinical diagram reads like a brutally honest self-portrait of modern computer use. In the original figure, a rhesus monkey sits in a restraint chair, a cable runs from an implanted electrode to recording gear, and a tube delivers juice when the animal performs correctly on the task shown on the screen1. Remixers kept this layout and swapped out the labels, so the 'stimulus screen' became a gaming monitor, a phone, or a TikTok feed, while the juice reward stood in for Red Bull, soda or dopamine itself4.

Most versions use the raw diagram with a plain caption, with the monkey as a stand-in for the poster. Others photoshop the screen contents, replace the juice container with a branded drink, or redraw the monkey's expression to match whatever hobby the joke targets. The tone is self-deprecating rather than cruel, and KYM lists it as a close cousin of the Neuron Activation format4. Some posts also keep the 'watch X get Y' phrasing from the first Reddit crosspost3.

Gallery

Origin & Background

Platform

Scientific paper (source) / Twitter (viral spread)

Date

2020

The diagram comes from the Cognitive Neurophysiology Laboratory's 2011 study 'The neuronal basis of self-motion perception,' which used rhesus monkeys to look at how the brain processes optic flow4. A copy of the same illustration showed up on a Reed College biology course page in 2012, inside materials about addiction and reward circuits1.

Meme use started on June 12, 2020, when Twitter account @shack_diesel reposted the image with no caption; the tweet collected over 23,000 likes and 3,400 retweets2. The next day, June 13, a user crossposted it to the /r/ape subreddit under the title 'Watch stimulus screen get dopamine reward,' which climbed past 1,400 upvotes3.

How It Spread

On June 15, 2020, a user reposted the diagram to /r/gaming under the title 'Rate my setup,' which climbed to over 8,800 upvotes and introduced the image to a much larger non-biology audience5. Instagram accounts picked it up next: rat.mans.memes added a caption on October 11, 2020, and poomkinjuice later uploaded a 2022 version that passed 60,000 likes6.

The exploitable form became dominant over the following years. On June 16, 2021, Tumblr user topherchris posted an edit that collected over 10,900 notes7. On August 3, 2022, Instagram account mememonk_ reframed the diagram around 'literally me syndrome,' reaching 18,000 likes8.

Later edits swapped the stimulus screen for different cultural references. Instagram user souvlaki.vape.nation uploaded a version tied to the 'YouTube without eating' meme on December 17, 2022, which reached around 5,500 likes in a month9. On January 26, 2023, monkey.posting reposted the format and passed 17,000 likes within a day10.

Timeline

2011

The Cognitive Neurophysiology Laboratory publishes 'The neuronal basis of self-motion perception,' which includes the original diagram of the monkey, stimulus screen and juice reward mechanism[4].

2012

The same image appears on a Reed College biology course page about addiction and reward circuits[1].

2021-06-16

Tumblr user topherchris posts a photoshopped version that collects over 10,900 notes[7].

2023-01-26

Monkey.posting reposts the format and passes 17,000 likes in a day[10].

How to Use This Meme

A typical post keeps the lab diagram and its arrows intact, then swaps the 'stimulus screen' and 'juice reward mechanism' labels, or the images they point to, for whatever activity and reward the poster wants to roast themselves for. Common conventions include replacing the screen with a specific game, app or video platform, and swapping the juice for an energy drink or soda6. Captions often use the 'watch X get Y' structure popularized by the first /r/ape repost3.