carries impulses from spinal cord to autonomic ganglia?

Answer 1

the answer to you question is the postganglionis efferent neuron!!!!^_^

Answer 2

Sensory input from the body surface, from joint, tendon, and muscle receptors, and from internal organs passes centrally through the dorsal roots of the spinal cord. fibers from motor cells in the spinal cord exit via the ventral roots and course to their peripheral targets (autonomic ganglia or skeletal muscle). The spinal nerve is formed by the joining of dorsal and ventral roots, and it is the basic structural and functional unit on which the peripheral nervous system is built.