sympathetic ganglion morphology trait prevertebral ganglion morphology trait smb Any measurable or observable characteristic related to the shape, structure, color, or pattern of the sympathetic ganglia located in front of the vertebral column and associated with the major branches of the abdominal aorta; these include the celiac, aorticorenal, superior and inferior mesenteric ganglia. VT:0015051 Trait.ontology 2010-04-21T04:17:52Z