Figure 2.
Schematic diagram of the dual-pathway model of saccadic control. The model is symmetric, but only connections for making a rightward saccade are shown. EBN, excitatory burst neurons; IBN, inhibitory burst neurons; (r,c)SC, rostral, caudal superior colliculus; NRTP, nucleus reticularis tegmenti pontis; FOR, fastigial oculomotor region; OMV, oculomotor vermis; OPN, omnipause neuron; VR, VL are the velocity drive commands from the EBN to the ocular motor nuclei. Arrowheads are excitatory, disks are inhibitory. See §§3 and 4 for explanation of function and colour code.