title: A study of the development of the orbicularis oris muscle.
mesh_terms: D002454:Cell Differentiation; D004558:Electric Stimulation; D004576:Electromyography; D005071:Evoked Potentials; D005152:Facial Muscles / Q000098:blood supply / Q000196:embryology* / Q000294:innervation / Q000502:physiology; D006801:Humans; D008046:Lip / Q000098:blood supply / Q000196:embryology* / Q000294:innervation; D008048:Lip Neoplasms / Q000601:surgery; D009508:Nevus, Pigmented / Q000601:surgery