Complete Neuron Map Reveals Surprising Fruit Fly Brain Dynamics

WHO:

SciTechDaily - A large international research team led by labs at Harvard Medical School and Princeton University.

SciTechDaily - Study co-senior authors Rachel Wilson and Wei-Chung Allen Lee.

SciTechDaily - Co-first authors Helen Yang and Alexander Bates.

SciTechDaily - Mala Murthy and Sebastian Seung, co-authors of the study.

SciTechDaily - Co-author Arie Matsliah.

WHAT:

SciTechDaily - The researchers created the first complete wiring diagram of every connection between neurons in the central nervous system of an adult fruit fly.

SciTechDaily - The detailed map, called a connectome, includes the fruit fly’s nerve cord and adds to an earlier connectome of the fly brain.

SciTechDaily - The full connectome is freely available online for global scientific research.

SciTechDaily - The study was published on June 8 in Nature.

WHERE:

SciTechDaily - The research was conducted at Harvard Medical School and Princeton University.

WHEN:

SciTechDaily - The study was published on June 8, 2026.

SciTechDaily - In 2024, the FlyWire Consortium published a complete connectome of a fruit fly brain.

WHY:

SciTechDaily - The research aims to understand how the brain and body work together to produce complex behaviors.

SciTechDaily - The findings suggest that many fruit fly behaviors are controlled by local neural circuits rather than a single command center in the brain.

HOW:

SciTechDaily - Researchers prepared thousands of thin serial sections from a single fruit fly and imaged them with electron microscopy.

SciTechDaily - AI tools were used to align the images and assemble them into a unified 3D map.

SciTechDaily - The connectome shows how each neuron connects with other neurons at the synapse level.

(UPDATED June 15, 2026 08:55 UTC)

A large international research team led by labs at Harvard Medical School and Princeton University has created the first complete wiring diagram of every connection between neurons in the central nervous system of an adult fruit fly, known as a connectome. This detailed map, which includes the fruit fly’s nerve cord and builds on an earlier connectome of the fly brain, is now freely available online for global scientific research. The study, co-authored by Rachel Wilson, Wei-Chung Allen Lee, Helen Yang, Alexander Bates, Mala Murthy, Sebastian Seung, and Arie Matsliah, was published on June 8, 2026, and aims to enhance our understanding of how the brain and body work together to produce complex behaviors.