For years, scientists have used AI models to mimic how the primate brain recognizes objects—the so-called ventral visual stream. But the dorsal stream, which handles motion and spatial awareness, has lagged behind due to a lack of large-scale neural data. Now, a team led by Ethan B. Trepka and colleagues at Stanford and collaborating institutions has released STSBench, a dataset that captures activity from over 2,000 single neurons in the superior temporal sulcus (STS) of rhesus macaques watching natural videos. This nearly 50-fold increase over prior dorsal stream datasets opens the door to building more accurate computational models of how we perceive movement and location.
The researchers recorded neuronal responses while monkeys viewed thousands of unique, natural video clips, ensuring the data reflects real-world visual processing. They demonstrated that STSBench can be used to benchmark encoding models—algorithms that predict neural firing from visual input—and even to reconstruct what the animal saw from its brain activity alone. This work, accepted at NeurIPS 2025, represents a major step forward in understanding the dorsal stream's role in vision, complementing the well-studied ventral stream.
Why It Matters for Your Brain
Understanding the dorsal stream isn't just academic. This pathway is critical for tasks like catching a ball, navigating a crowded room, or driving a car. By providing a robust dataset, STSBench enables researchers to develop better AI models that can predict and explain how our brains process motion and space. For anyone interested in cognitive abilities, this research highlights that different brain networks handle different types of visual information, and that AI can help us decode those processes. Knowing that your brain has specialized circuits for object recognition (ventral) and motion/spatial awareness (dorsal) can inform how you train your mind—for instance, activities like sports or video games that demand quick spatial judgments may strengthen dorsal stream efficiency.
What You Can Do
To keep your dorsal stream sharp, engage in activities that challenge your motion perception and spatial reasoning: play fast-paced video games, practice sports that require hand-eye coordination, or try spatial puzzles like mazes and tangrams. These evidence-based exercises may help maintain the neural circuits responsible for processing where things are and how they move.
Source: arXiv q-bio.NC
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