Autonomic Nervous System View this post on Instagram dorsal root, ventral root, gray ramus, white ramus, dorsal ramus, ventral ramus……. preganglionic, postganglionic, prevertebral, paravertebral….. do any of these words/concepts confuse you? This video reviews the basics of the autonomic nervous system. A post shared by PAssion4pathology (@passion4pathology) on Aug 8, 2019 at 11:45pm PDT Share this:TwitterFacebookLike this:Like Loading...