Ganglia, SpinalSpinal CordNeurons, AfferentGangliaNeuronsRetinal Ganglion CellsChick EmbryoBasal GangliaGanglia, SympatheticGanglia, AutonomicTrigeminal GanglionSpinal Cord InjuriesGanglia, ParasympatheticGanglia, SensoryStellate GanglionSpiral GanglionNodose GanglionGanglia, InvertebrateSuperior Cervical GanglionSpinal NervesBasal Ganglia DiseasesInjections, SpinalSpinal Nerve RootsRetinaGeniculate GanglionSpinal Cord DiseasesAxonsAnesthesia, SpinalSpinal Cord NeoplasmsSpinal CanalSpinal Cord CompressionSpinal DiseasesSpinal NeoplasmsRats, Sprague-DawleyAction PotentialsSpinal StenosisSpinal FusionAutonomic Fibers, PreganglionicOptic NerveMotor Neurons