Muscle Manual was written to familiarize the reader with the anatomy and physiology of the orofacial musculature. Professionals who work with clients exhibiting deficits of the orofacial complex require a clear understanding of the typical muscle functions that occur in the act of swallowing and speech to more properly diagnose and treat the disorders associated. The orofacial complex consists of the muscles of the jaw, lips, tongue, soft palate, and larynx. This manual provides comprehensive illustrations of each muscle with descriptions of the anatomical maps for those muscles. The maps also discuss the origin, insertion, function of the muscle, as well as the cranial nerve innervation associated, allowing the reader to more easily comprehend the anatomy and associated physiology.