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Vestibular labyrinths (canals) have directional sensory receptor cells for rotation of the head in space. The vestibular nerve ganglion cells project to vestibular nuclei. Secondary neurons connect with oculomotor neurons in a 3 or 4 neuron reflex arch to produce conjugate (horizontal example) eye movements. The 3rd nerve moves the eye nasally and the 6th nerve moves each eye laterally. This VOR circuitry responds to turning the head when oscillatory movement is over 0.5 degrees/sec/sec.
Vestibular labyrinths (canals) have directional sensory receptor cells for rotation of the head in space. The vestibular nerve ganglion cells project to vestibular nuclei. Secondary neurons connect with oculomotor neurons in a 3 or 4 neuron reflex arch to produce conjugate (horizontal example) eye movements. The 3rd nerve moves the eye nasally and the 6th nerve moves each eye laterally. This VOR circuitry responds to turning the head when oscillatory movement is over 0.5 degrees/sec/sec.