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The dorsal nerve cord is one of the embryonic features unique to chordates, along with a notochord, a post-anal tail and pharyngeal slits. It is a hollow cord dorsal to the no â¦ tochord.ike humans, A dorsal nerve cord would be present on the back of the person or chordate. Some invertebrates such as arthropods, have a ventral nerve cord on the belly..
Chordate Locomotion. â¢ Notochord stiffens the long body axis. â pressurized cartilage material bound in fibrous. sheath. â¢ segmental muscles (myomeres) act on. notochord to produce undulating motion. â¢ dorsal nerve cord branches to each set of. muscles to coordinate swimming motion.