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The Fly’s Compass
RING ATTRACTOR · ELLIPSOID BODY · A HEADING HELD IN NEURONS
HEADINGdrift 0°
Drag the dial (or use ← → / A D) to turn the fly. Orange = where it actually points · cyan = its neural estimate.
Turn with the lights off and the compass drifts; switch them on and the landmark snaps it back. Drag the scene to orbit · ⌘/Ctrl+scroll to zoom.
RING ACTIVITYbump
The 36 compass neurons unrolled — one bump of activity, kept single by local excitation and global inhibition. Its position is the heading.