Schematic of one side of the larval zebrafish vestibular circuit. A) Hair cells in the inner ear (blue/yellow/black lines) transduce the sensation of force into electrical activity. Afferent neurons in the stato-acoustic ganglion (SAG) relay this information to vestibular neurons in the hindbrain (VN). The midline-crossing VNs are categorized into two types, blue, which project to the oculomotor nucleus (nIII) while the yellow type project to both the trochlear nucleus (nIV) and nIII. Motoneurons that control the superior oblique (SO, red) and superior rectus (SR, green) muscles cross the midline, while those that control the inferior oblique (cyan, IO) and inferior rectus (magenta, IR) remain ipsilateral to the motor nuclei. B) Activation of both types of VN during roll tilts (along the barbecue axis of the fish, viewed head-on). C&amp;D) Activation of a single subtype of VN to produce compensatory torsional eye rotations during nose down and nose up tilts.