Wiring diagram of all 24 PFL3 neurons in the fly brain. Each grey arrow represents the preferred heading angle that a PFL3 neuron innervating a given glomerulus of the protocerebral bridge is expected to inherit from presynaptic heading-sensitive EPG and delta7 neurons in that glomerulus (Extended Data Fig. 5a–g ). Blue and red arrows represent the bridge-inherited, preferred heading angle H pref of the left and right PFL3 neurons that innervate a given column in the fan-shaped body. Purple arrows represent each column’s preferred goal angle G pref.
