1. Relating to the soma or trunk, the wall of the body cavity, or the body in general.
2. Relating to or involving the skeleton or skeletal (voluntary) muscle and the innervation of the latter, as distinct from the viscera or visceral (involuntary) muscle and its (autonomic) innervation.
3. Relating to the vegetative, as distinguished from the generative, functions.
The information shown above for somatic is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.